@article{3972, abstract = {{Using a finite-difference time-domain method, we theoretically investigate the optical spectra of crossing perpendicular photonic crystal waveguides with quantum dots embedded in the central rod. The waveguides are designed so that the light mainly propagates along one direction and the cross talk is greatly reduced in the transverse direction. It is shown that when a quantum dot (QD) is resonant with the cavity, strong coupling can be observed via both the transmission and crosstalk spectrum. If the cavity is far off-resonant from the QD, both the cavity mode and the QD signal can be detected in the transverse direction since the laser field is greatly suppressed in this direction. This structure could have strong implications for resonant excitation and in-plane detection of QD optical spectroscopy.}}, author = {{Song, Xiaohong and Declair, Stefan and Meier, Torsten and Zrenner, Artur and Förstner, Jens}}, issn = {{1094-4087}}, journal = {{Optics Express}}, keywords = {{tet_topic_phc, tet_topic_qd}}, number = {{13}}, pages = {{14130--14136}}, publisher = {{The Optical Society}}, title = {{{Photonic crystal waveguides intersection for resonant quantum dot optical spectroscopy detection}}}, doi = {{10.1364/oe.20.014130}}, volume = {{20}}, year = {{2012}}, } @inproceedings{3967, abstract = {{We simulate the linear and nonlinear optical response from split-ring resonator (SRR) arrays to study collective effects between the constituent SRRs that determine spectral properties of the second harmonic generation (SHG). We apply the Discontinuous Galerkin Time Domain (DGTD) method and the hydrodynamic Maxwell-Vlasov model to calculate the SHG emission. Our model is able to qualitatively reproduce and explain the non-monotonic dependence of the spectral SHG transmission measured experimentally for SRR arrays with different lattice constants}}, author = {{Grynko, Yevgen and Meier, Torsten and Linden, Stefan and Niesler, Fabian B. P. and Wegener, Martin and Förstner, Jens}}, keywords = {{tet_topic_meta, tet_topic_shg}}, location = {{Bad Honnef}}, number = {{1}}, pages = {{128--130}}, publisher = {{AIP Conference Proceedings}}, title = {{{Near-field coupling and second-harmonic generation in split-ring resonator arrays}}}, doi = {{10.1063/1.4750118}}, volume = {{1475}}, year = {{2012}}, } @article{3970, abstract = {{Optical experiments on second-harmonic generation from split-ring-resonator square arrays show a nonmonotonic dependence of the conversion efficiency on the lattice constant. This finding is interpreted in terms of a competition between dilution effects and linewidth or near-field changes due to interactions among the individual elements in the array.}}, author = {{Linden, S. and Niesler, F. B. P. and Förstner, Jens and Grynko, Yevgen and Meier, Torsten and Wegener, M.}}, issn = {{0031-9007}}, journal = {{Physical Review Letters}}, keywords = {{tet_topic_shg, tet_topic_meta}}, number = {{1}}, publisher = {{American Physical Society (APS)}}, title = {{{Collective Effects in Second-Harmonic Generation from Split-Ring-Resonator Arrays}}}, doi = {{10.1103/physrevlett.109.015502}}, volume = {{109}}, year = {{2012}}, } @article{43200, abstract = {{A novel adaptive approach to compute the eigenenergies and eigenfunctions of the two-particle (electron-hole) Schrödinger equation including Coulomb attraction is presented. As an example, we analyze the energetically lowest exciton state of a thin one-dimensional semiconductor quantum wire in the presence of disorder which arises from the non-smooth interface between the wire and surrounding material. The eigenvalues of the corresponding Schrödinger equation, i.e., the one-dimensional exciton Wannier equation with disorder, correspond to the energies of excitons in the quantum wire. The wavefunctions, in turn, provide information on the optical properties of the wire. We reformulate the problem of two interacting particles that both can move in one dimension as a stationary eigenvalue problem with two spacial dimensions in an appropriate weak form whose bilinear form is arranged to be symmetric, continuous, and coercive. The disorder of the wire is modelled by adding a potential in the Hamiltonian which is generated by normally distributed random numbers. The numerical solution of this problem is based on adaptive wavelets. Our scheme allows for a convergence proof of the resulting scheme together with complexity estimates. Numerical examples demonstrate the behavior of the smallest eigenvalue, the ground state energies of the exciton, together with the eigenstates depending on the strength and spatial correlation of disorder.}}, author = {{Meier, Torsten and Mollet, Christian and Kunoth, Angela}}, journal = {{Communications in Computational Physics}}, number = {{1}}, pages = {{21--47}}, publisher = {{Cambridge University Press}}, title = {{{Excitonic Eigenstates of Disordered Semiconductor Quantum Wires: Adaptive Wavelet Computation of Eigenvalues for the Electron-Hole Schrödinger Equation}}}, doi = {{10.4208/cicp.081011.260712a}}, volume = {{14}}, year = {{2012}}, } @inbook{56044, author = {{Brandl-Bredenbeck, Hans Peter and Kämpfe, Astrid}}, booktitle = {{Research methods in Physical Education and Youth Sport}}, editor = {{Armour, Kathleen and MacDonald, Doune}}, pages = {{174--188}}, publisher = {{Routledge}}, title = {{{Surveys}}}, year = {{2012}}, } @article{56040, author = {{Kämpfe, Astrid and Brüne, Alexander and Brandl-Bredenbeck, Hans Peter and Weigelt, Matthias}}, journal = {{sportunterricht}}, number = {{9}}, pages = {{265--270}}, title = {{{Wie die Profis? Ideen zum Einsatz psychologischer Übungsformen im Schulsport}}}, volume = {{61}}, year = {{2012}}, } @article{56043, author = {{Brandl-Bredenbeck, Hans Peter and Kämpfe, Astrid and Köster, Carolin}}, journal = {{Forschungsforum Paderborn}}, pages = {{40--46}}, title = {{{Gesund und erfolgreich in Paderborn studieren (GriPs). Analyse studentischer Lebensstile.}}}, volume = {{15}}, year = {{2012}}, } @inproceedings{57712, author = {{Jöllenbeck, Thomas and Schönle, C and Beck, K and Neuhaus, Dorothee and Pietschmann, J and Wawer, C}}, booktitle = {{Schriften der Deutschen Vereinigung für Sportwissenschaft}}, editor = {{Freiwald, J and Baumgart, C and Jansen, C}}, pages = {{125--130}}, publisher = {{Feldhaus Czwalina}}, title = {{{Dynamischer Knievalgus - Hauptrisikofaktor für Verletzungen des vorderen Kreuzbandes?}}}, volume = {{222}}, year = {{2012}}, } @inproceedings{57714, author = {{Neuhaus, Dorothee and Olivier, N}}, booktitle = {{Sportpsychologische Kompetenz und Verantwortung. Schriften der Deutschen Vereinigung für Sportwissenschaft}}, editor = {{Wegner, M and Brückner, J.-P and Kratzenstein, S}}, pages = {{114}}, publisher = {{Feldhaus Czwalina}}, title = {{{Zum Einfluss von zusätzlichen Instruktionen bei unterschiedlichen Fokusbedingungen auf das bipedale Stehen auf einem Luftkissen}}}, volume = {{221}}, year = {{2012}}, } @inproceedings{57713, author = {{Neuhaus, Dorothee and Olivier, N}}, booktitle = {{Kurzfassung der Postbeiträge des dvs-Expertenworkshops 2012: Effektgesteuerte Handlungskontrolle - Wie sag´ ich´s meinem Kinde?}}, title = {{{Zum Einfluss von attentional unterschiedlichen Fokusinstruktionen auf das bipedale Stehen von jungen sporttreibenden Erwachsenen}}}, year = {{2012}}, } @inbook{64901, author = {{Greb, Lutz and Paradies, Jan}}, booktitle = {{Topics in Current Chemistry}}, isbn = {{9783642377587}}, issn = {{0340-1022}}, publisher = {{Springer Berlin Heidelberg}}, title = {{{Paracyclophane Derivatives in Frustrated Lewis Pair Chemistry}}}, doi = {{10.1007/128_2012_375}}, year = {{2012}}, } @article{26904, author = {{Herbst, Antje and Diethelm, Katharina and Cheng, Guo and Alexy, Ute and Icks, Andrea and Buyken, Anette}}, issn = {{0022-3166}}, journal = {{The Journal of Nutrition}}, pages = {{1348--1354}}, title = {{{Direction of Associations between Added Sugar Intake in Early Childhood and Body Mass Index at Age 7 Years May Depend on Intake Levels}}}, doi = {{10.3945/jn.110.137000}}, year = {{2011}}, } @article{26906, abstract = {{AbstractObjectiveNutrition-related health problems such as obesity are frequent among children and adolescents of Turkish descent living in Germany, yet data on their dietary habits are scarce. One reason might be the lack of validated assessment tools for this target group. We therefore aimed to validate protein and K intakes from one 24 h recall against levels estimated from one 24 h urine sample in children and adolescents of Turkish descent living in Germany.DesignCross-sectional analyses comprised estimation of mean differences, Pearson correlation coefficients, cross-classifications and Bland–Altman plots to assess the agreement between the nutritional intake estimated from a single 24 h recall and a single 24 h urine sample collected on the previous day.SettingDortmund, Germany.SubjectsData from forty-three study participants (aged 5–18 years; 26 % overweight) with a traditional Turkish background were included.ResultsThe 24 h recall significantly overestimated mean protein and K intake by 10·7 g/d (95 % CI of mean difference: 0·6, 20·7 g/d) and 344 mg/d (95 % CI 8, 680 mg/d), respectively. Correlations between intake estimates were r = 0·25 (P = 0·1) and 0·31 (P = 0·05). Both methods classified 70 % and 69 % of the participants into the same/adjacent quartile of protein and K intake and misclassified 7 % and 7 %, respectively, into the opposite quartile. Bland–Altman plots indicated a wide scattering of differences in both protein and K intake.ConclusionsAmong children and adolescents of traditional Turkish descent living in Germany, one 24 h recall may only be valid for categorizing subjects into high, medium or low consumers.}}, author = {{Bokhof, Beate and Buyken, Anette and Doğan, Canan and Karaboğa, Arzu and Kaiser, Josa and Sonntag, Antje and Kroke, Anja}}, issn = {{1368-9800}}, journal = {{Public Health Nutrition}}, pages = {{640--647}}, title = {{{Validation of protein and potassium intakes assessed from 24 h recalls against levels estimated from 24 h urine samples in children and adolescents of Turkish descent living in Germany: results from the EVET! Study}}}, doi = {{10.1017/s1368980011002734}}, year = {{2011}}, } @article{27010, author = {{Diethelm, Katharina and Remer, Thomas and Jilani, Hannah and Kunz, Clemens and Buyken, Anette}}, issn = {{0261-5614}}, journal = {{Clinical Nutrition}}, pages = {{640--646}}, title = {{{Associations between the macronutrient composition of the evening meal and average daily sleep duration in early childhood}}}, doi = {{10.1016/j.clnu.2011.05.004}}, year = {{2011}}, } @article{27011, abstract = {{There are no published data regarding the overall dietary glycaemic index (GI) and glycaemic load (GL) of Australian children and adolescents. We therefore aim to describe the dietary GI and GL of participants of the 2007 Australian National Children's Nutrition and Physical Activity Survey (2007ANCNPAS), and to identify the main foods contributing to their GL. Children, aged 2–16 years, who provided two 24 h recalls in the 2007ANCNPAS were included. A final dataset of 4184 participants was analysed. GI of each food item was assigned using a previously published method. GL was calculated, and food groups contributing to the GL were described by age group and sex. The weighted mean dietary GI and GL of the participants were 54 (sd 5) and 136 (sd 44), respectively. Among the nutrients examined, Ca had the highest inverse relationship with GI (P < 0·001), while percentage energy from starch was most positively associated with GI. The association between fibre density and GI was modest, and percentage energy from sugar had an inverse relationship with GI. Daily dietary GL contributed by energy-dense and/or nutrient-poor (EDNP) items in subjects aged 14–16 years was more than doubled that of subjects aged 2–3 years. To conclude, Australian children and adolescents were having a high-GI dietary pattern characterised by high-starchy food intake and low Ca intake. A significant proportion of their dietary GL was from EDNP foods. Efforts to reduce dietary GI and GL in children and adolescents should focus on energy-dense starchy foods.}}, author = {{Chun Yu Louie, Jimmy and Buyken, Anette and Heyer, Kristina and Flood, Victoria M.}}, issn = {{0007-1145}}, journal = {{British Journal of Nutrition}}, pages = {{1273--1282}}, title = {{{Dietary glycaemic index and glycaemic load among Australian children and adolescents}}}, doi = {{10.1017/s0007114511001577}}, year = {{2011}}, } @article{27068, abstract = {{AbstractObjectiveHighly processed foods such as convenience foods usually have a high salt content and therefore might indirectly act as adipogenic due to an increasing consumption of sugar-containing beverages (SCB). We examined the association between dietary salt and body weight status.DesignWe used data on urinary Na excretion as an indicator of dietary salt and BMI standard deviation score (BMI-SDS) and percentage body fat (%BF) of children and adolescents participating in the DONALD (Dortmund Nutritional and Anthropometric Longitudinally Designed) Study.SettingDortmund, Germany.SubjectsChildren and adolescents (n 364) who had at least two 24 h urine samples and two dietary records in the observational period between 2003 and 2009 were considered in our data analysis.ResultsRepeated-measures regression models revealed that urinary Na was positively associated with BMI-SDS (+0·202 SDS/g Na excretion at baseline; P < 0·001) and %BF (+1·303 %BF/g Na excretion at baseline; P < 0·01) at baseline in boys and girls. These associations remained significant after adjustment for SCB consumption and total energy intake. Furthermore, there was a positive trend between baseline Na excretion and the individual change in %BF in the study period (+0·364 increase in %BF/g Na excretion at baseline), which was confirmed after inclusion of SCB consumption or total energy intake. There was no significant association between the change in Na excretion and the concurrent change of either BMI-SDS or %BF in any model.ConclusionsOur results suggest that a high intake of processed salty foods could have a negative impact on body weight status in children and adolescents independently from their consumption of SCB.}}, author = {{Libuda, Lars and Kersting, Mathilde and Alexy, Ute}}, issn = {{1368-9800}}, journal = {{Public Health Nutrition}}, pages = {{433--441}}, title = {{{Consumption of dietary salt measured by urinary sodium excretion and its association with body weight status in healthy children and adolescents}}}, doi = {{10.1017/s1368980011002138}}, year = {{2011}}, } @article{27069, author = {{Alexy, Ute and Cheng, Guo and Libuda, Lars and Hilbig, Annett and Kersting, Mathilde}}, issn = {{0261-5614}}, journal = {{Clinical Nutrition}}, pages = {{78--84}}, title = {{{24h-Sodium excretion and hydration status in children and adolescents - Results of the DONALD Study}}}, doi = {{10.1016/j.clnu.2011.08.014}}, year = {{2011}}, } @article{27076, author = {{Muckelbauer, R. and Libuda, Lars and Clausen, K. and Kersting, M.}}, issn = {{1436-9990}}, journal = {{Bundesgesundheitsblatt - Gesundheitsforschung - Gesundheitsschutz}}, pages = {{339--348}}, title = {{{Ansätze der Übergewichtsprävention durch verbessertes Trinkverhalten im Setting Grundschule}}}, doi = {{10.1007/s00103-010-1224-7}}, year = {{2011}}, } @inbook{27589, author = {{Muckelbauer, R. and Libuda, Lars and Kersting, M.}}, booktitle = {{Developing Children´s Food Products.}}, isbn = {{978-1-84569-431-9 }}, publisher = {{Woodhead Publishing Limited }}, title = {{{Fluids and children’s health. }}}, year = {{2011}}, } @article{27728, abstract = {{ Context: Whether prepubertal glucocorticoid status impacts on the timing of puberty is not clear. Objective: The objective of the study was to examine the relationship between prepubertal glucocorticoid status and early or late pubertal markers, independent of adrenarchal and nutritional status. Design and Participants: Prospective cohort study of healthy Caucasian children (n = 111, 56 boys) who provided both 24-h urine samples and weighed dietary records 1 and 2 yr before the start of pubertal growth spurt [age at take-off (ATO)]. Measurements: Major urinary glucocorticoid and androgen metabolites determined by gas chromatography-mass spectrometry analysis were summed to assess daily overall cortisol (ΣC21) and adrenal androgen secretion; urinary free cortisol and cortisone measured by RIA were summed (UFF+UFE) as an indicator of potentially bioactive free glucocorticoids. Main Outcomes: The main outcomes included ATO, age at peak height velocity, age at menarche/voice break, ages at Tanner stage 2 for breast (girls) and genital (boys) development, and pubic hair. Results: In girls ΣC21, but not UFF+UFE, was associated with pubertal markers after adjusting for overall adrenal androgen, urinary nitrogen, and body fat. Girls with higher ΣC21 (fourth quartile) reached ATO 0.7 yr (P = 0.01) and menarche 0.9 yr later (P = 0.006) than girls with lower ΣC21 (first quartile). The ΣC21 tended to be also positively associated with age at Tanner stage 2 for breast (P = 0.1), Tanner stage 2 for pubic hair (P = 0.1), and age at peak height velocity (P = 0.06). In boys, neither the ΣC21 nor UFF+UFE was related to pubertal timing. Conclusion: An individually higher prepubertal glucocorticoid secretion level, even in physiological range, appears to delay early and late pubertal timing of healthy girls, particularly their onset of pubertal growth spurt and menarche. }}, author = {{Shi, Lijie and Wudy, Stefan A. and Buyken, Anette and Maser-Gluth, Christiane and Hartmann, Michaela F. and Remer, Thomas}}, issn = {{0021-972X}}, journal = {{The Journal of Clinical Endocrinology & Metabolism}}, pages = {{E891--E898}}, title = {{{Prepubertal Glucocorticoid Status and Pubertal Timing}}}, doi = {{10.1210/jc.2010-2935}}, year = {{2011}}, }