@misc{AlbrechtClassGoebeletal.2020, author = {Albrecht, Sophia and Class, Fabian and Goebel, Jan and Kohler, Ulrich and Krawietz, Marian}, title = {Leben in der ehemaligen DDR}, series = {SOEP Survey Papers}, journal = {SOEP Survey Papers}, publisher = {German Institute for Economic Research (DIW Berlin)}, address = {Berlin}, year = {2020}, language = {de} } @misc{Kohler2020, author = {Kohler, Ulrich}, title = {Editorial: Survey Research Methods during the COVID-19 Crisis}, series = {Survey Research Methods}, volume = {14}, journal = {Survey Research Methods}, number = {2}, address = {Konstanz}, issn = {1864-3361}, doi = {10.18148/srm/2020.v14i2.7769}, pages = {93 -- 94}, year = {2020}, language = {en} } @misc{Timme2020, author = {Timme, Sinika}, title = {The face of affect and exertion}, series = {Journal of sport \& exercise psychology}, volume = {42}, journal = {Journal of sport \& exercise psychology}, publisher = {Human Kinetics Publishers}, address = {Champaign}, issn = {0895-2779}, pages = {S3 -- S3}, year = {2020}, language = {en} } @misc{Buerkner2020, author = {B{\"u}rkner, Hans-Joachim}, title = {Europeanisation versus Euroscepticism}, series = {Geopolitics}, volume = {25}, journal = {Geopolitics}, number = {3}, publisher = {Routledge, Taylor \& Francis Group}, address = {Philadelphia, Pa. [u.a]}, issn = {1465-0045}, doi = {10.1080/14650045.2020.1723964}, pages = {545 -- 566}, year = {2020}, abstract = {Several overlapping crises which affected the EU during the past ten years have recently aggravated. Especially the progressing refugee crisis, the persisting financial crisis and geopolitical turmoil in the EU's neighbourhood contributed to the rise of anti-EU movements and diverse articulations of Euroscepticism. Although public opinion and mainstream political analysis have easily identified right-wing populism as one of the most important drivers, it is still doubtful if it can be equated with Euroscepticism without further ado. To date it is by no means clear how and where Euroscepticism exactly originates.}, language = {en} } @misc{SeyfriedRoedel2020, author = {Seyfried, Salim and R{\"o}del, Claudia Jasmin}, title = {Blood flow matters in a zebrafish model of cerebral cavernous malformations}, series = {Circulation research : an official journal of the American Heart Association}, volume = {126}, journal = {Circulation research : an official journal of the American Heart Association}, number = {1}, publisher = {Lippincott Williams \& Wilkins}, address = {Baltimore, Md.}, issn = {0009-7330}, doi = {10.1161/CIRCRESAHA.119.316286}, pages = {E1 -- E2}, year = {2020}, language = {en} } @misc{RoederSinger2020, author = {R{\"o}der, Katrin and Singer, Christoph}, title = {Fortune, felicity and happiness in the early modern period}, series = {Critical survey : CS}, volume = {32}, journal = {Critical survey : CS}, number = {3}, publisher = {Berghahn Books}, address = {Oxford [u.a.]}, issn = {0011-1570}, doi = {10.3167/cs.2020.320301}, pages = {1 -- 7}, year = {2020}, language = {en} } @misc{Spiegel2020, author = {Spiegel, Thomas J.}, title = {Errata zu: Spiegel, Thomas Jussuf: Ist der Naturalismus eine Ideologie? - (Deutsche Zeitschrift f{\"u}r Philosophie : Zweimonatsschrift der internationalen philosophischen Forschung. -68 (2020), 1. - S. 51 -71. - DOI: 10.1515/dzph-2020-0003)}, series = {Deutsche Zeitschrift f{\"u}r Philosophie : Zweimonatsschrift der internationalen philosophischen Forschung}, volume = {68}, journal = {Deutsche Zeitschrift f{\"u}r Philosophie : Zweimonatsschrift der internationalen philosophischen Forschung}, number = {3}, publisher = {De Gruyter}, address = {Berlin}, issn = {0012-1045}, doi = {10.1515/dzph-2020-8888}, pages = {492 -- 493}, year = {2020}, language = {de} } @misc{JoostBrechtMayeretal.2020, author = {Joost, Theresa Anna and Brecht, Pia and Mayer, Frank and Cassel, Michael}, title = {Feasibility of open low-field MRI measurements in adolescent athletes with spondylolisthesis}, series = {Medicine and science in sports and exercise : official journal of the American College of Sports Medicine}, volume = {52}, journal = {Medicine and science in sports and exercise : official journal of the American College of Sports Medicine}, number = {17}, publisher = {Lippincott Williams \& Wilkins}, address = {Philadelphia}, issn = {0195-9131}, doi = {10.1249/01.mss.0000683832.74059.9d}, pages = {790 -- 790}, year = {2020}, abstract = {PURPOSE: To determine the feasibility of upright compared to supine MRI measurements to determine characteristics of the lumbar spine in AA with spondylolisthesis. METHODS: Ten AA (n=10; m/f: 4/6; 14.5±1.7y; 163±7cm; 52±8kg) from various sports, diagnosed with spondylolisthesis grade I-II Meyerding confirmed by x-ray in standing lateral view, were included. Open low-field MRI images (0.25 Tesla) in upright (82°) and supine (0°) position were evaluated by two observers. Medical imaging software was used to measure the anterior translation (AT, mm), lumbosacral joint angle (LSJA, °) and lordosis angle (LA, °). Reliability was analyzed by the intra-rater correlation coefficient (ICC) and standard error of measurements (SEM). RESULTS: Due to motion artifacts during upright position, measures of three participants had to be excluded. Between observers, AT ranged from 4.2±2.7mm to 5.5±1.9mm (ICC=0.94, SEM=0.6mm) in upright and from 4.9±2.4mm to 5.9±3.0mm (ICC=0.89, SEM=0.9mm) in supine position. LSJA varied from 5.1±2.2° to 7.3±1.5° (ICC=0.54, SEM=1.5°) in upright and from 9.8±2.5° to 10±2.4° (ICC=0.73, SEM=1.1°) in supine position. LA differed from 58.8±14.6° to 61.9±6° (ICC=0.94, SEM=1.19°) in upright and from 51.9±11.7° to 52.6±11.1° (ICC=0.98, SEM=1.59°) in supine position. CONCLUSIONS: Determination of AT and LA showed good to excellent reliability in both, upright and supine position. In contrast, reliability of LSJA had only moderate to good correlation between observers and should therefore be interpreted with caution. However, motion artifacts should be taken into consideration during upright imaging procedures.}, language = {en} } @misc{NairLinKhajooeietal.2020, author = {Nair, Alexandra and Lin, Chiao-I and Khajooei, Mina and Heikkila, Mika and Engel, Tilman and Mayer, Frank}, title = {Side comparison of knee muscle activities in response to perturbed walking of unilateral ankle instability}, series = {Medicine and science in sports and exercise : MSSE}, volume = {52}, journal = {Medicine and science in sports and exercise : MSSE}, number = {17}, publisher = {Lippincott Williams \& Wilkins}, address = {Philadelphia}, issn = {0195-9131}, doi = {10.1249/01.mss.0000671088.10003.6b}, pages = {97 -- 97}, year = {2020}, abstract = {Acute ankle sprain leads in 40\% of all cases to chronic ankle instability (CAI). CAI is related to a variety of motor adaptations at the lower extremities. Previous investigations identified increased muscle activities while landing in CAI compared to healthy control participants. However, it remains unclear whether muscular alterations at the knee muscles are limited to the involved (unstable) ankle or are also present at the uninvolved leg. The latter might potentially indicate a risk of ankle sprain or future injury on the uninvolved leg. Purpose: To assess if there is a difference of knee muscle activities between the involved and uninvolved leg in participants with CAI during perturbed walking. Method: 10 participants (6 females; 4 males; 26±4 years; 169±9 cm; 65±7 kg) with unilateral CAI walked on a split-belt treadmill (1m/s) for 5 minutes of baseline walking and 6 minutes of perturbed walking (left and right side, each 10 perturbations). Electromyography (EMG) measurements were performed at biceps femoris (BF) and rectus femoris (RF). EMG amplitude (RMS; normalized to MVIC) were analyzed for 200ms pre-heel contact (Pre200), 100ms post heel contact (Post100) and 200ms after perturbation (Pert200). Data was analyzed by paired t-test/Wilcoxon test based on presence or absence of normal distribution (Bonferroni adjusted α level p≤ 0.0125). Results: No statistical difference was found between involved and uninvolved leg for RF (Pre200: 4±2\% and 11± 22\%, respectively, p= 0.878; Post100: 10± 5 and 18±31\%, p=0.959; Pert200: 6±3\% and 13±24\%, p=0.721) as well as for BF (Pre200: 12±7\% and 11±6, p=0.576; Post100: 10±7\% and 9±7\%, p=0.732; Pert200: 7±4 and 7±7\%, p=0.386). Discussion: No side differences in muscle activity could be revealed for assessed feedforward and feedback responses (perturbed and unperturbed) in unilateral CAI. Reduced inter-individual variability of muscular activities at the involved leg might indicate a rather stereotypical response pattern. It remains to be investigated, whether muscular control at the knee is not affected by CAI, or whether both sides adapted in a similar style to the chronic condition at the ankle.}, language = {en} } @misc{LinKhajooeiNairetal.2020, author = {Lin, Chiao-I and Khajooei, Mina and Nair, Alexandra and Heikkila, Mika and Kaplick, Hannes and Tilman, Engel and Mayer, Frank}, title = {Activities of hip muscles in response to perturbed walking in individual with chronic ankle instability}, series = {Medicine and science in sports and exercise : MSSE}, volume = {52}, journal = {Medicine and science in sports and exercise : MSSE}, number = {17}, publisher = {Lippincott Williams \& Wilkins}, address = {Philadelphia}, issn = {0195-9131}, doi = {10.1249/01.mss.0000671060.98581.0b}, pages = {94 -- 94}, year = {2020}, abstract = {Chronic ankle instability (CAI) is not only an ankle issue, but also affects sensorimotor system. People with CAI show altered muscle activation in proximal joints such as hip and knee. However, evidence is limited as controversial results have been presented regarding changes in activation of hip muscles in CAI population. PURPOSE: To investigate the effect of CAI on activity of hip muscles during normal walking and walking with perturbations. METHODS: 8 subjects with CAI (23 ± 2 years, 171 ± 7 cm and 65 ± 4 kg) and 8 controls (CON) matched by age, height, weight and dominant leg (25 ± 3 years, 172 ± 7 cm and 65 ± 6 kg) walked shoed on a split-belt treadmill (1 m/s). Subjects performed 5 minutes of baseline walking and 6 minutes walking with 10 perturbations (at 200 ms after heel contact with 42 m/s2 deceleration impulse) on each side. Electromyography signals from gluteus medius (Gmed) and gluteus maximus (Gmax) were recorded while walking. Muscle amplitudes (Root Mean Square normalized to maximum voluntary isometric contraction) were calculated at 200 ms before heel contact (Pre200), 100 ms after heel contact (Post100) during normal walking and 200 ms after perturbations (Pert200). Differences between groups were examined using Mann Whitney U test and Bonferroni correction to account for multiple testing (adjust α level p≤ 0.0125). RESULT: In Gmed, CAI group showed lower muscle amplitude than CON group after heel contact (Post100: 18±7 \% and 47±21 \%, p< .01) and after walking perturbations ( 31±13 \% and 62±26 \%, p< .01), but not before heel contact (Pre200: 5±2 \% and 11±10 \%, p= 0.195). In Gmax, no difference was found between CAI and CON groups in all three time points (Pre200: 12±5 \% and 17±12 \%, p= 0.574; Post100: 41±21 \% and 41±13 \%, p= 1.00; Pert200: 79±46 \% and 62±35 \%, p= 0.505). CONCLUSION: People with CAI activated Gmed less than healthy control in feedback mechanism (after heel contact and walking with perturbations), but not in feedforward mechanism (before heel contact). Less activation on Gmed may affect the balance in frontal plane and increase the risk of recurrent ankle sprain, giving way or feeling ankle instability in patients with CAI during walking. Future studies should investigate the effect of Gmed strengthening or neuromuscular training on CAI rehabilitation.}, language = {en} }