@article{26897, author = {{Bokhof, Beate and Günther, Anke LB and Berg-Beckhoff, Gabriele and Kroke, Anja and Buyken, Anette}}, issn = {{1368-9800}}, journal = {{Public Health Nutrition}}, pages = {{826--834}}, title = {{{Validation of protein intake assessed from weighed dietary records against protein estimated from 24 h urine samples in children, adolescents and young adults participating in the Dortmund Nutritional and Longitudinally Designed (DONALD) Study}}}, doi = {{10.1017/s136898000999317x}}, year = {{2010}}, } @article{26899, abstract = {{The extent to which the quality of dietary carbohydrates (CHO) changes throughout puberty is not known. We analysed trends in the quantity and quality of CHO intake among German adolescents by separately examining trends during puberty (pubertal trends) and trends in CHO intake from 1988 to 2007 (secular trends). Linear mixed-effects regression analyses were performed in 216 participants of the Dortmund Nutritional and Anthropometric Longitudinally Designed Study who had provided weighed 3 d dietary records at the onset of the pubertal growth spurt (defined by age at take-off) and over the subsequent 4 years. Over the course of puberty, CHO quality changed little: added sugar intake from beverages increased in girls (0·25 (se 0·12) % energy (% E)/year, P = 0·04) and added sugar intake from sweets decreased in both sexes (boys: − 0·22 (se 0·11) % E/year, P = 0·049; girls: − 0·20 (se 0·10) % E/year, P = 0·04). For both sexes, significant upward secular trends were observed for CHO (% E), glycaemic load (g/MJ) and added sugar intakes from sources other than sweets and soft drinks (% E), while absolute fibre intake (g/d) decreased (P ≤ 0·04). Concomitant increases in total added sugar intake (% E) and decreases in fibre and whole-grain densities (g/MJ) (P = 0·001–0·02) were confined to boys only. The quality of dietary CHO consumed by healthy German adolescents shows notable secular declines, but does not change markedly during puberty. Public health initiatives should be tailored to improve the overall quality of CHO nutrition.}}, author = {{Cheng, Guo and Libuda, Lars and Karaolis-Danckert, Nadina and Alexy, Ute and Bolzenius, Katja and Remer, Thomas and Buyken, Anette}}, issn = {{0007-1145}}, journal = {{British Journal of Nutrition}}, pages = {{1375--1383}}, title = {{{Trends in dietary carbohydrate quality during puberty from 1988 to 2007: a cause for concern?}}}, doi = {{10.1017/s0007114510002278}}, year = {{2010}}, } @article{26902, author = {{Cheng, Guo and Remer, Thomas and Prinz-Langenohl, Reinhild and Blaszkewicz, Meinolf and Degen, Gisela H and Buyken, Anette}}, issn = {{0002-9165}}, journal = {{The American Journal of Clinical Nutrition}}, pages = {{556--564}}, title = {{{Relation of isoflavones and fiber intake in childhood to the timing of puberty}}}, doi = {{10.3945/ajcn.2010.29394}}, year = {{2010}}, } @article{27009, author = {{Buyken, Anette and Flood, Victoria and Empson, Marianne and Rochtchina, Elena and Barclay, Alan W and Brand-Miller, Jennie and Mitchell, Paul}}, issn = {{0002-9165}}, journal = {{The American Journal of Clinical Nutrition}}, pages = {{634--643}}, title = {{{Carbohydrate nutrition and inflammatory disease mortality in older adults}}}, doi = {{10.3945/ajcn.2010.29390}}, year = {{2010}}, } @article{27077, author = {{Alexy, U and Libuda, Lars and Mersmann, S and Kersting, M}}, issn = {{0954-3007}}, journal = {{European Journal of Clinical Nutrition}}, pages = {{160--166}}, title = {{{Convenience foods in children's diet and association with dietary quality and body weight status}}}, doi = {{10.1038/ejcn.2010.254}}, year = {{2010}}, } @article{27078, abstract = {{Adequate dietary habits are supposed to be one of the most important modifiable factors in osteoporosis prevention. However, the importance of specific nutrients is controversial. We examined relevant nutrients which are supposed to have an impact on bone parameters and compared their effect sizes with those of two known predictors of bone development: bone-related muscle mass and androgen levels. We analysed nutritional, hormonal and anthropometric data from 107 prepubertal children participating in the Dortmund Nutritional and Anthropometric Longitudinally Designed Study. Diaphyseal bone mineral content (BMC), cortical area (CA), periosteal circumference, strength strain index and muscle area of the non-dominant forearm were measured by peripheral quantitative computed tomography. Data on long-term nutrient intakes (e.g. protein, Ca and vitamin D) were derived from 3 d weighed dietary records. Twenty-four hour urinary excretion rates of androgen metabolites including the sex steroid androstenediol were measured using GC–MS. Of all considered nutrients, only protein showed a trend for an association with BMC (β = +0·11; P = 0·073) and CA (β = +0·11; P = 0·056) in stepwise linear regression models. None of the other considered dietary variables was associated with bone parameters. The size of the bone anabolic effect of protein was partly comparable with that of androstenediol. Even though boys gained more bone mass in comparison with girls, the protein effect did not differ between sexes. Bone-related muscle area and sex steroids have the strongest effects on prepubertal diaphyseal bone. However, dietary protein may have a similar bone anabolic influence compared with androstenediol. In children without explicit nutrient deficits, protein seems to be the most important dietary component for diaphyseal bone status.}}, author = {{Libuda, Lars and Wudy, Stefan A. and Schoenau, Eckhard and Remer, Thomas}}, issn = {{0007-1145}}, journal = {{British Journal of Nutrition}}, pages = {{428--435}}, title = {{{Comparison of the effects of dietary protein, androstenediol and forearm muscle area on radial bone variables in healthy prepubertal children}}}, doi = {{10.1017/s0007114510003508}}, year = {{2010}}, } @article{27079, author = {{Johner, S A and Libuda, Lars and Shi, L and Retzlaff, A and Joslowski, G and Remer, T}}, issn = {{0954-3007}}, journal = {{European Journal of Clinical Nutrition}}, pages = {{1365--1370}}, title = {{{Urinary fructose: a potential biomarker for dietary fructose intake in children}}}, doi = {{10.1038/ejcn.2010.160}}, year = {{2010}}, } @article{27131, author = {{Diethelm, Katharina and Libuda, Lars and Bolzenius, Katja and Griefahn, Barbara and Buyken, Anette and Remer, Thomas}}, issn = {{1663-2826}}, journal = {{Hormone Research in Paediatrics}}, pages = {{390--398}}, title = {{{Longitudinal Associations between Endogenous Melatonin Production and Reported Sleep Duration from Childhood to Early Adulthood}}}, doi = {{10.1159/000303134}}, year = {{2010}}, } @inbook{27590, author = {{Remer, T. and Libuda, Lars}}, booktitle = {{Nutritional Influences on Bone Health. }}, isbn = {{978-1-84882-977-0}}, publisher = {{Springer}}, title = {{{Bone-anabolic impact of dietary high protein intake compared with effects of low potential renal acid load, endogenous steroid hormones, and muscularity in children. }}}, year = {{2010}}, } @article{27723, author = {{Remer, Thomas and Shi, Lijie and Buyken, Anette and Maser-Gluth, Christiane and Hartmann, Michaela F. and Wudy, Stefan A.}}, issn = {{0021-972X}}, journal = {{The Journal of Clinical Endocrinology & Metabolism}}, pages = {{3002--3009}}, title = {{{Prepubertal Adrenarchal Androgens and Animal Protein Intake Independently and Differentially Influence Pubertal Timing}}}, doi = {{10.1210/jc.2009-2583}}, year = {{2010}}, } @article{27725, abstract = {{ Whether prepubertal estrogen production impacts on the timing of puberty is not clear. We aimed to investigate prepubertal 24-h estrogen excretion levels and their association with early and late pubertal markers. Daily urinary excretion rates of estrogens of 132 healthy children, who provided 24-h urine samples 1 and 2 yr before the start of the pubertal growth spurt [age at takeoff (ATO)], were quantified by stable isotope dilution/GC-MS. E-sum3 (estrone + estradiol + estriol) was used as a marker for potentially bioactive estrogen metabolites and E-sum5 (E-sum3 + 16-epiestriol + 16-ketoestradiol) for total estrogen production. Pubertal outcomes were ATO, age at peak height velocity (APHV), duration of pubertal growth acceleration (APHV-ATO), age at Tanner stage 2 for pubic hair (PH2), genital (G2, boys) and breast (B2, girls) development, and age at menarche. Prepubertal urinary estrogen excretions (E-sum3 and E-sum5) were not associated with ATO, APHV, and age at PH2 but with duration of pubertal growth acceleration ( P < 0.01) in both sexes. Girls with higher E-sum3 reached B2 0.9 yr ( P = 0.04) and menarche 0.3 yr earlier ( P = 0.04) than girls with lower E-sum3. E-sum3 was not associated with age at G2 in boys ( P = 0.6). For most pubertal variables, the associations with E-sum3 were stronger than with E-sum5. In conclusion, prepubertal estrogens may not be critical for the onset of the pubertal growth spurt but are correlated with its duration in both boys and girls. Prepubertal estrogen levels may already predict the timing of girls' menstruation and breast development but do not appear to affect sexual maturation in boys. }}, author = {{Shi, Lijie and Remer, Thomas and Buyken, Anette and Hartmann, Michaela F. and Hoffmann, Philipp and Wudy, Stefan A.}}, issn = {{0193-1849}}, journal = {{American Journal of Physiology-Endocrinology and Metabolism}}, pages = {{E990--E997}}, title = {{{Prepubertal urinary estrogen excretion and its relationship with pubertal timing}}}, doi = {{10.1152/ajpendo.00374.2010}}, year = {{2010}}, } @article{27726, author = {{Buyken, Anette and Bolzenius, Katja and Karaolis-Danckert, Nadina and Günther, Anke L.B. and Kroke, Anja}}, issn = {{1042-0533}}, journal = {{American Journal of Human Biology}}, pages = {{216--224}}, title = {{{Body composition trajectories into adolescence according to age at pubertal growth spurt}}}, doi = {{10.1002/ajhb.21125}}, year = {{2010}}, } @article{27780, author = {{Buyken, Anette and Mitchell, P. and Ceriello, A. and Brand-Miller, J.}}, issn = {{0012-186X}}, journal = {{Diabetologia}}, pages = {{406--418}}, title = {{{Optimal dietary approaches for prevention of type 2 diabetes: a life-course perspective}}}, doi = {{10.1007/s00125-009-1629-8}}, year = {{2010}}, } @article{27781, author = {{Degen, Gisela H. and Blaszkewicz, Meinolf and Shi, Lijie and Buyken, Anette and Remer, Thomas}}, issn = {{1613-4125}}, journal = {{Molecular Nutrition & Food Research}}, pages = {{359--367}}, title = {{{Urinary isoflavone phytoestrogens in German children and adolescents - A longitudinal examination in the DONALD cohort}}}, doi = {{10.1002/mnfr.201000325}}, year = {{2010}}, } @inproceedings{17422, abstract = {{Commercial software of material flow simulations has the ability to layout the simulated models. Arranged equipment, such as conveyors or machines, includes the need to model and determine motion paths for moving objects like forklifts or automatically guided vehicles, so that the simulation framework is able to navigate all vehicles across those motion paths. After analyzing first scenarios, the user often carries out layout changes in the simulation model, e.g. moving, adding or deleting equipment. However, those changes cause time consuming, additional modeling of the motion paths for the user. Our motion planning algorithm reduces these changes by automatically determining the motion paths for moving objects, depending on an actual model layout without colliding with other objects. The algorithm works on the basis of the virtual scene’s 3D-data used for the simulation model’s visualization. We demonstrate the technique with a multi-floor building example.}}, author = {{Fischer, Matthias and Renken, Hendrik and Laroque, Christoph and Schaumann, Guido and Dangelmaier, Wilhelm}}, booktitle = {{Proceedings of the 2010 Winter Simulation Conference}}, isbn = {{9781424498666}}, title = {{{Automated 3D-motion planning for ramps and stairs in intra-logistics material flow simulations}}}, doi = {{10.1109/wsc.2010.5678906}}, year = {{2010}}, } @article{9744, abstract = {{Direct ultrasound irradiation is advantageous to increase the efficiency of the hydrothermal method which can be used for the production of piezoelectric thin films and lead free piezoelectric ceramics. To apply ultrasound directly to the process transducer prototypes were developed regarding the boundary conditions of the hydrothermal method. LiNbO$_{3}$ and PIC 181 were proven as feasible materials for high temperature resistant transducers ($\geq 200^\circ C$). Resistance of the transducers horn against the corrosive mineralizer was achieved by using Hastelloy C-22. The efficiency of the ultrasound assisted hydrothermal method depends on the generated sound field. Impedance and sound field measurements have shown that the sound field depends on the filling level and the position and design of the transducer.}}, author = {{Bornmann, Peter and Hemsel, Tobias and Littmann, Walter and Ageba, Ryo and Kadota, Yoishi and Morita, Takeshi}}, issn = {{1948-5719}}, journal = {{Journal of Korean Physical Society}}, keywords = {{High-temperature transducer, Hydrothermal method, Lithium-niobate transducer}}, number = {{4}}, pages = {{1122}}, title = {{{Ultrasonic Transducer for the Hydrothermal Method}}}, doi = {{10.3938/jkps.57.1122}}, volume = {{57}}, year = {{2010}}, } @article{4202, abstract = {{Unintentional doping in nonpolar a-plane 112¯0 gallium nitride GaN grown on r-plane 11¯02 sapphire using a three-dimensional 3D–two-dimensional 2D growth method has been characterized. For both 2D only and 3D–2D growth, the presence of an unintentionally doped region adjacent to the GaN/sapphire interface is observed by scanning capacitance microscopy SCM. The average width of this unintentionally doped layer is found to increase with increasing 3D growth time. By using an intentionally doped GaN:Si staircase structure for calibration, it is shown that the unintentionally doped region has an average carrier concentration of 2.50.31018 cm−3. SCM also reveals the presence of unintentionally doped features extending at 60° from the GaN/sapphire interface. The observation of decreasing carrier concentration with distance from the GaN/sapphire interface along these features may suggest that the unintentional doping arises from oxygen diffusion from the sapphire substrate. Low temperature cathodoluminescence spectra reveal emission peaks at 3.41 and 3.30 eV, which are believed to originate from basal plane stacking faults BSFs and prismatic stacking faults PSFs, respectively. It is shown that the inclined features extending from the GaN/sapphire interface exhibit both enhanced BSF and PSF emission. We suggest that enhanced unintentional doping occurs in regions around PSFs. Where BSFs intersect this doped material their emission is also enhanced due to reduced nonradiative recombination. Transmission electron microscopy confirms the presence of PSFs extending through the film at 60° from the GaN/sapphire interface.}}, author = {{Zhu, Tongtong and Johnston, Carol F. and Häberlen, Maik and Kappers, Menno J. and Oliver, Rachel A.}}, issn = {{0021-8979}}, journal = {{Journal of Applied Physics}}, number = {{2}}, publisher = {{AIP Publishing}}, title = {{{Characterization of unintentional doping in nonpolar GaN}}}, doi = {{10.1063/1.3284944}}, volume = {{107}}, year = {{2010}}, } @article{4210, abstract = {{In this paper we demonstrate a strain-driven GaN interlayer method to reduce dislocation densities in GaN grown on (111) oriented silicon by metal organic vapour phase epitaxy (MOVPE). In order to achieve crack-free GaN layers of reasonable thicknesses and dislocation densities it is crucial to integrate both dislocation reduction and strain management layers. In contrast to techniques like FACELO or nanoELO we show the in situ formation of GaN islands directly on the AlN nucleation layer without the need to deposit a SiO2 or SiNx mask. A graded AlGaN layer for strain management can be grown on top of this dislocation reducing 3D GaN inter-layer in order to achieve crack-free GaN layers grown on top of the AlGaN strain management layer. Furthermore, an additional SiNx layer for subsequent dislocation reduction can also be incorporated into the structure and is shown to efficiently reduce the dislocation density down to the low 10^9 cm^2. The structural properties of the 3D GaN island buffer layer and overgrown samples are studied by means of SEM, cross-sectional, and plan view TEM. Cathodoluminiscence in an SEM is employed to correlate the dislocation microstructure as observed by plan view TEM with luminescent properties.}}, author = {{Häberlen, Maik and Zhu, Dandan and McAleese, Clifford and Zhu, Tongtong and Kappers, Menno J. and Humphreys, Colin J.}}, issn = {{0370-1972}}, journal = {{physica status solidi (b)}}, number = {{7}}, pages = {{1753--1756}}, publisher = {{Wiley}}, title = {{{Dislocation reduction in GaN grown on Si(111) using a strain-driven 3D GaN interlayer}}}, doi = {{10.1002/pssb.200983537}}, volume = {{247}}, year = {{2010}}, } @article{5644, abstract = {{The economic relevance of information systems has been studied for many years and has attracted an abundance of research papers. However, the ?productivity paradoxon? of the 90s, Carr?s widely recognized paper ?IT doesn?t matter?, and several studies that do not find a positive correlation between IS investments and economic performance reveal long-lasting difficulties for IS researchers to explain ?IS business value?. Business executives and researchers also continue to question the value of IS investments. This raises the question of whether literature reviews have tapped their potential to address the concerns by covering key research areas of IS business value and preserving their key findings. In order to address this question, this paper identifies and describes 12 key research areas, and synthesizes what literature reviews published in pertinent academic outlets have done to preserve knowledge. The analysis of 22 literature reviews shows that some crucial areas have not been (sufficiently) covered. They provide fertile areas for future literature reviews. As this work is based on the results of more than 200 research papers, it is capable of drawing a comprehensive picture of the current state-of-the-art in IS business value research.}}, author = {{Schryen, Guido}}, journal = {{Business \& Information Systems Engineering (BISE)}}, keywords = {{Business value, Information systems, Literature review, Meta review}}, number = {{4}}, pages = {{225--237}}, publisher = {{Springer}}, title = {{{Preserving knowledge on IS business value: what literature reviews have done}}}, volume = {{52}}, year = {{2010}}, } @article{5645, abstract = {{The economic relevance of information systems has been studied for many years and has attracted an abundance of research papers. However, the ?productivity paradoxon? of the 1990s, Carr?s widely recognized paper ?IT doesn?t matter?, and several studies that do not find a positive correlation between IS investments and economic performance reveal long-lasting difficulties for IS researchers to explain ?IS business value?. Business executives and researchers also continue to question the value of IS investments. This raises the question of whether literature reviews have tapped their potential to address the concerns by covering key research areas of IS business value and preserving their key findings. In order to address this question, this paper identifies and describes 12 key research areas, and synthesizes what literature reviews published in pertinent academic outlets have done to preserve knowledge. The analysis of 22 literature reviews shows that some crucial areas have not been (sufficiently) covered. They provide fertile areas for future literature reviews. As this work is based on the results of more than 200 research papers, it is capable of drawing a comprehensive picture of the current state-of-the-art in IS business value research.}}, author = {{Schryen, Guido}}, journal = {{Wirtschaftsinformatik}}, number = {{4}}, pages = {{225--237}}, publisher = {{Gabler; Springer}}, title = {{{Ökonomischer Wert von Informationssystemen - Beitrag von Literatur-Reviews zum Wissenserhalt ( = Preserving Knowledge on IS Business Value. What Literature Reviews Have Done)}}}, volume = {{52}}, year = {{2010}}, }