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When is a crisis a crisis?
(2017)
The marketing materials of remote eye-trackers suggest that data quality is invariant to the position and orientation of the participant as long as the eyes of the participant are within the eye-tracker’s headbox, the area where tracking is possible. As such, remote eye-trackers are marketed as allowing the reliable recording of gaze from participant groups that cannot be restrained, such as infants, schoolchildren and patients with muscular or brain disorders. Practical experience and previous research, however, tells us that eye-tracking data quality, e.g. the accuracy of the recorded gaze position and the amount of data loss, deteriorates (compared to well-trained participants in chinrests) when the participant is unrestrained and assumes a non-optimal pose in front of the eye-tracker. How then can researchers working with unrestrained participants choose an eye-tracker? Here we investigated the performance of five popular remote eye-trackers from EyeTribe, SMI, SR Research, and Tobii in a series of tasks where participants took on non-optimal poses. We report that the tested systems varied in the amount of data loss and systematic offsets observed during our tasks. The EyeLink and EyeTribe in particular had large problems. Furthermore, the Tobii eye-trackers reported data for two eyes when only one eye was visible to the eye-tracker. This study provides practical insight into how popular remote eye-trackers perform when recording from unrestrained participants. It furthermore provides a testing method for evaluating whether a tracker is suitable for studying a certain target population, and that manufacturers can use during the development of new eye-trackers.
Most event studies rely on cumulative abnormal returns, measured as percentage changes in stock prices, as their dependent variable. Stock price reflects the value of the operating business plus non-operating assets minus debt. Yet, many events, in particular in marketing, only influence the value of the operating business, but not non-operating assets and debt. For these cases, the authors argue that the cumulative abnormal return on the operating business, defined as the ratio between the cumulative abnormal return on stock price and the firm-specific leverage effect, is a more appropriate dependent variable. Ignoring the differences in firm-specific leverage effects inflates the impact of observations pertaining to firms with large debt and deflates those pertaining to firms with large non-operating assets. Observations of firms with high debt receive several times the weight attributed to firms with low debt. A simulation study and the reanalysis of three previously published marketing event studies shows that ignoring the firm-specific leverage effects influences an event study's results in unpredictable ways.
Background: Treatment of asthma does not always comply with asthma guidelines (AG). This may be rooted in direct or indirect resistance on the doctors’ and/or patients’ side or be caused by the healthcare system. To assess whether patients’ concepts and attitudes are really an implementation barrier for AG, we analysed the patients’ perspective of a “good asthma therapy” and contrasted their wishes with current recommendations.
Methods: Using a qualitative exploratory design, topic centred focus group (FG) discussions were performed until theoretical saturation was reached. Inclusion criteria were an asthma diagnosis and age above 18. FG sessions were recorded audio-visually and analysed via a mapping technique and content analysis performed according to Mayring (supported by MAXQDA®). Participants’ speech times and the proportion of time devoted to different themes were calculated using the Videograph System® and related to the content analysis.
Results: Thirteen men and 24 women aged between 20 and 77 from rural and urban areas attended five FG. Some patients had been recently diagnosed with asthma, others years previously or in childhood. The following topics were addressed: (a) concern about or rejection of therapy components, particularly corticosteroids, which sometimes resulted in autonomous uncommunicated medication changes, (b) lack of time or money for optimal treatment, (c) insufficient involvement in therapy choices and (d) a desire for greater empowerment, (e) suboptimal communication between healthcare professionals and (f) difficulties with recommendations conflicting with daily life. Primarily, (g) participants wanted more time with doctors to discuss difficulties and (h) all aspects of living with an impairing condition.
Conclusions: We identified some important patient driven barriers to implementing AG recommendations. In order to advance AG implementation and improve asthma treatment, the patients’ perspective needs to be considered before drafting new versions of AG. These issues should be addressed at the planning stage.
Trial registration: DRKS00000562 (German Clinical Trials Registry).
What is the magnetic field distribution for the equation of state of magnetized neutron stars?
(2017)
In this Letter, we report a realistic calculation of the magnetic field profile for the equation of state inside strongly magnetized neutron stars. Unlike previous estimates, which are widely used in the literature, we find that magnetic fields increase relatively slowly with increasing baryon chemical potential (or baryon density) of magnetized matter. More precisely, the increase is polynomial instead of exponential, as previously assumed. Through the analysis of several different realistic models for the microscopic description of stellar matter (including hadronic, hybrid and quark models) combined with general relativistic solutions endowed with a poloidal magnetic field obtained by solving Einstein–Maxwell's field equations in a self-consistent way, we generate a phenomenological fit for the magnetic field distribution in the stellar polar direction to be used as input in microscopic calculations.
Far-right parties gained considerable support in many European countries in recent years. Austria comes within a whisker of becoming the first country in the history of the European Union to elect a far-right president, Horbert Hofer, the candidate from the Freedom Party. Similarly, in France, Marie Le Pen is expected to be Front National’s (FN) candidate in the 2017 presidential election and probably to make it to the second round of voting...
Much of today’s conflicts and challenges, globally and locally, can be in part attributed to or are influenced by the hegemony of Western over non-Western cultures and politics. Long-standing and still reproduced Western dominance and power are directed at the protection of own interests, thereby re-creating power imbalances, inequalities and practices of exclusion...
Früh- und Spätwerk eines Autors sind manchmal gegensätzlich. Hätte Fontane nur Geschwisterliebe und Mathilde Möhring hinterlassen, käme niemand auf die Idee, beides stamme aus derselben Feder. Auch die Beliebtheit verteilt sich oft unterschiedlich auf Werkteile, die zu unterschiedlicher Zeit entstanden sind. Der Fall Clemens Brentano ist allerdings speziell. Seine vor 1817 geschriebenen Werke haben ein anderes Publikum als die, die er nach 1817 schrieb. Zwei Leserschaften hat der Autor, beide ansehnlich, die des religiösen Spätwerks noch um ein Vielfaches größer als die des Romantik-OEuvres. Und zwischen den beiden Gruppen: keine Berührung. Die einen kennen nichts von dem, was die anderen verehren, und umgekehrt.
Wie kommt das? Was ist 1817 mit Clemens Brentano passiert? Welche Veränderungen zeigen um diese Zeit die Lebensumstände, das Schreiben, die Welt- und Selbstreflexion des Autors?
Das vorweg: Brentano sorgte für die literaturhistorisch beispiellose Werkscheidung selbst, indem er seinen Nachlass zweiteilte. Die religiösen Manuskripte bekam der fromme Bruder Christian, die übrigen die freigeistige Schwester Bettine. Entsprechend sollten die Werkteile sehr unterschiedliche Editionsverfahren durchlaufen. Schon am Wendepunkt sandte Brentano zudem das Signal, er werde in Zukunft anders schreiben als bisher. Nach dem Eindruck des Publikums, von Wolfgang Bunzel zusammengefasst, "gibt er 1817 seinen bisherigen Lebensinhalt, das Dichten, auf [...]. Fortan entstehen scheinbar nurmehr religiöse Erbauungsschriften."