213 research outputs found
A Comparison of the Red and Green Coronal Line Intensities at the 29 March 2006 and the 1 August 2008 Total Solar Eclipses: Considerations of the Temperature of the Solar Corona
During the total solar eclipse at Akademgorodok, Siberia, Russia, in 1 August
2008, we imaged the flash spectrum with a slitless spectrograph. We have
spectroscopically determined the duration of totality, the epoch of the 2nd and
3rd contacts and the duration of the flash spectrum (63 s during ingress and 48
s during egress). Here we compare the 2008 flash spectra with those that we
similarly obtained from the total solar eclipse of 29 March 2006, at
Kastellorizo, Greece. Any changes of the intensity of the corona emission
lines, in particularly those of [Fe X] and [Fe XIV], could give us valuable
information about the energy content of the solar corona and the temperature
distribution of the corona. The results show that the high-ionization state,
the [Fe XIV] emission line, was much weaker during the 2008 eclipse, indicating
that following the long, inactive period during the solar minimum, there was a
drop in the overall temperature of the solar corona.Comment: 10 color figures of spectra, 3 b/w figure
Test of renormalization predictions for universal finite-size scaling functions
We calculate universal finite-size scaling functions for systems with an
n-component order parameter and algebraically decaying interactions. Just as
previously has been found for short-range interactions, this leads to a
singular epsilon-expansion, where epsilon is the distance to the upper critical
dimension. Subsequently, we check the results by numerical simulations of spin
models in the same universality class. Our systems offer the essential
advantage that epsilon can be varied continuously, allowing an accurate
examination of the region where epsilon is small. The numerical calculations
turn out to be in striking disagreement with the predicted singularity.Comment: 6 pages, including 3 EPS figures. To appear in Phys. Rev. E. Also
available as PDF file at
http://www.cond-mat.physik.uni-mainz.de/~luijten/erikpubs.htm
Feasibility and acceptability of aquatic exercise therapy in burn patients â A pilot study
Background: As the assistive and resistive properties of water can facilitate the performance of exercise, aquatic exercise therapy might be a promising rehabilitation modality for burn patients. This study aimed to investigate the feasibility and acceptability of aquatic exercise therapy in adult burn patients with an indication for supervised exercise therapy. Methods: Eligible for this observational pilot study were all competent adult burn patients with an indication for supervised exercise therapy who had been admitted to the burn centre of the Maasstad Hospital between June 2016 and February 2017. Patients were asked to participate in an in-hospital aquatic exercise therapy program for a minimum of 2 weeks, 2 times per week, or otherwise serve as control by having land-based exercise therapy (regular care). Feasibility of aquatic exercise therapy was assessed by comparing the number of eligible patients to the number of patients that could actually participate, monitoring attendance rates, monitoring complications, and evaluating early experiences. Acceptability was assessed using the Water Exercise Acceptability Questionnaire. Results: Eleven patients were invited and ten of them agreed to participate. All chose aquatic instead of land-based exercise therapy. Participants were aged between 19 and 64 years and their burns affected 18â53% of total body surface area (TBSA). Aquatic exercise therapy appeared feasible in nine of 13 eligible patients (69%). Attendance rates were high (42â100%) and the majority of participants (n = 9) continued with aquatic exercise therapy beyond the initial two weeks. No serious complications (e.g. infections) occurred. Adverse symptoms (wound healing issues) were reported in five participants, but in four of them these were not likely to be due to the aquatic exercise therapy. Enjoyment was high and adherence to the aquatic exercise therapy was further facilitated by support from staff, a sense of achievement, noticeable improvements, personal motivation, and support from other participants. Peer support was reported as a positive side effect. Conclusions: These preliminary results indicate that aquatic exercise therapy is both feasible and acceptable for the majority of adult burn patients with an indication for supervised exercise therapy. No indications were found for an increased risk of infection or other serious complications.</p
Feasibility and acceptability of aquatic exercise therapy in burn patients â A pilot study
Background: As the assistive and resistive properties of water can facilitate the performance of exercise, aquatic exercise therapy might be a promising rehabilitation modality for burn patients. This study aimed to investigate the feasibility and acceptability of aquatic exercise therapy in adult burn patients with an indication for supervised exercise therapy. Methods: Eligible for this observational pilot study were all competent adult burn patients with an indication for supervised exercise therapy who had been admitted to the burn centre of the Maasstad Hospital between June 2016 and February 2017. Patients were asked to participate in an in-hospital aquatic exercise therapy program for a minimum of 2 weeks, 2 times per week, or otherwise serve as control by having land-based exercise therapy (regular care). Feasibility of aquatic exercise therapy was assessed by comparing the number of eligible patients to the number of patients that could actually participate, monitoring attendance rates, monitoring complications, and evaluating early experiences. Acceptability was assessed using the Water Exercise Acceptability Questionnaire. Results: Eleven patients were invited and ten of them agreed to participate. All chose aquatic instead of land-based exercise therapy. Participants were aged between 19 and 64 years and their burns affected 18â53% of total body surface area (TBSA). Aquatic exercise therapy appeared feasible in nine of 13 eligible patients (69%). Attendance rates were high (42â100%) and the majority of participants (n = 9) continued with aquatic exercise therapy beyond the initial two weeks. No serious complications (e.g. infections) occurred. Adverse symptoms (wound healing issues) were reported in five participants, but in four of them these were not likely to be due to the aquatic exercise therapy. Enjoyment was high and adherence to the aquatic exercise therapy was further facilitated by support from staff, a sense of achievement, noticeable improvements, personal motivation, and support from other participants. Peer support was reported as a positive side effect. Conclusions: These preliminary results indicate that aquatic exercise therapy is both feasible and acceptable for the majority of adult burn patients with an indication for supervised exercise therapy. No indications were found for an increased risk of infection or other serious complications.</p
'Diverse mobilities': second-generation Greek-Germans engage with the homeland as children and as adults
This paper is about the children of Greek labour migrants in Germany. We focus on two life-stages of âreturnâ for this second generation: as young children brought to Greece on holidays or sent back for longer periods, and as young adults exercising an independent âreturnâ migration. We draw both on literature and on our own field interviews with 50 first- and second-generation Greek-Germans. We find the practise of sending young children back to Greece to have been surprisingly widespread yet little documented. Adult relocation to the parental homeland takes place for five reasons: (i) a âsearch for selfâ; (ii) attraction of the Greek way of life; (iii) the actualisation of the âfamily narrative of returnâ by the second, rather than the first, generation; (iv) life-stage events such as going to university or marrying a Greek; (v) escape from a traumatic event or oppressive family situation. Yet the return often brings difficulties, disillusionment, identity reappraisal, and a re-evaluation of the German context
Tapping the nucleotide pool of the host: novel nucleotide carrier proteins of Protochlamydia amoebophila
Protochlamydia amoebophila UWE25 is related to the Chlamydiaceae comprising major pathogens of humans, but thrives as obligate intracellular symbiont in the protozoan host Acanthamoeba sp. The genome of P. amoebophila encodes five paralogous carrier proteins belonging to the nucleotide transporter (NTT) family. Here we report on three P. amoebophila NTT isoforms, PamNTT2, PamNTT3 and PamNTT5, which possess several conserved amino acid residues known to be critical for nucleotide transport. We demonstrated that these carrier proteins are able to transport nucleotides, although substrate specificities and mode of transport differ in an unexpected manner and are unique among known NTTs. PamNTT2 is a counter exchange transporter exhibiting submillimolar apparent affinities for all four RNA nucleotides, PamNTT3 catalyses an unidirectional proton-coupled transport confined to UTP, whereas PamNTT5 mediates a proton-energized GTP and ATP import. All NTT genes of P. amoebophila are transcribed during intracellular multiplication in acanthamoebae. The biochemical characterization of all five NTT proteins from P. amoebophila in this and previous studies uncovered that these metabolically impaired bacteria are intimately connected with their host cellâs metabolism in a surprisingly complex manner
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