Leader Affective Displays and Attributions of Charisma: The Role of Arousal

Research suggests that leader displays of positive affect are conducive to attributions of charisma. We qualify and extend this conclusion by arguing that this mainly holds for displays of positive affect that are associated with high levels of arousal. Results of a scenario experiment and a survey support this hypothesis, and show that besides the transfer of positive feelings per se, it is the transfer of arousal that mediates the relationship between leader affective displays and attributions of charisma.Arousal;Charisma;Leader Affect;Positive Feelings

Affective Match: Leader Emotional Displays, Follower Positive Affect, and Follower Performance

Leader emotions may play an important role in leadership effectiveness. Extending this earlier research on leader emotional displays and leadership effectiveness, we propose that the “affective match†between follower positive affect (PA) and leaders’ emotional displays moderates the effectiveness of leader emotional displays. Leader display of emotions has more positive effects on follower behavior if the match between the valence of leader emotion and follower PA is strong rather than weak. Support for this hypothesis was found in two experiments. The congruency between leader emotional displays and follower PA determined follower task performance and extra-role compliance. Results from the second experiment indicated that this effect is due to the affective aspects of leader behavior and not to the valence of the content of the message.Emotions;Leadership Effectiveness;Positive Affect

Prevalence of Schistosomiasis among Secondary School Boarding Students in Potiskum Metropolis, Yobe State, North-Eastern Nigeria

Schistosomiasis remains one of the world’s most prevalent diseases of public health importance. Despite more than a century of control efforts and the introduction of highly effective antischistosomal drug the eradication of the disease is still far from actualization. Six hundred (300 stool and300 urine) samples were collected randomly from the students who consented after obtaining some vital demographic data from them. The stool samples were processed using formol ether concentration techniques while the urine samples were processed by ordinary centrifugal sedimentation technique. The result obtained was tested using Chi-square. Of 600 samples, 30 urine samples were positive for S.haematobium giving 10.0% urinary schistosomiasis, while 6 faecal samples were positive for S. mansoni giving 2.0% intestinal schistosomiasis and an overall 6.0% of schistosomiasis.The result indicates that there is an increase in prevalence with increase in age. The infection rate was significantly higher (p < 0.05) among males (8.5%) than among females (1.0%).Infection was higher (11.2%) among students whose normal source of drinking water is stream, followed by those whose source of drinking water is well (4.0%) and the least among those using tap water (2.2%). The prevalence of schistosomiasis in relation to schools indicates a significant relationship (p < 0.05).FGSS had the highest prevalence (11.5%), followed by GSSTSS with 5.5% and GGSS recorded the least with 1.0%. Lack of prompt diagnosis, inadequate knowledge on the causes of schistosomiasis, unsuitable water supply and exposure to water bodies may be the likely predisposing factors responsible for the prevalence rate recorded in the study area

Conservative treatment of CMC-1 osteoarthritis

Initially, osteoarthritis of the carpometacarpal joint of the thumb (CMC-1) should be conservatively treated. However, literature concerning this topic is absent. Therefore, 39 patients (71 hands) with conservatively treated osteoarthritis of the carpometacarpal joint of the thumb were reviewed. The minimum follow-up period was I year; the average follow-up period was 8.8 years. Thirty-two women had bilateral CMC-I osteoarthritis; the remaining seven patients had unilateral CMC-1 osteoarthritis. Although suggested by others, long-term pain relief was not observed in this study. Moreover, patient satisfaction, thumb strength, and mobility were not influenced by the duration of the CMC-1 osteoarthritis. In conservatively treated patients, worse results are achieved than in operated patients, especially concerning their subjective experiences. The authors therefore advise surgery, especially in the case of pain which hampers the activities of daily life

Ultrafast pump-probe dynamics in ZnSe-based semiconductor quantum-wells

Pump-probe experiments are used as a controllable way to investigate the properties of photoexcited semiconductors, in particular, the absorption saturation. We present an experiment-theory comparison for ZnSe quantum wells, investigating the energy renormalization and bleaching of the excitonic resonances. Experiments were performed with spin-selective excitation and above-bandgap pumping. The model, based on the semiconductor Bloch equations in the screened Hartree-Fock approximation, takes various scattering processes into account phenomenologically. Comparing numerical results with available experimental data, we explain the experimental results and find that the electron spin-flip occurs on a time scale of 30 ps.Comment: 10 pages, 9 figures. Key words: nonlinear and ultrafast optics, modeling of femtosecond pump-probe experiments, electron spin-flip tim

Electron--Electron Scattering in Quantum Wires and it's Possible Suppression due to Spin Effects

A microscopic picture of electron-electron pair scattering in single mode quantum wires is introduced which includes electron spin. A new source of `excess' noise for hot carriers is presented. We show that zero magnetic field `spin' splitting in quantum wires can lead to a dramatic `spin'-subband dependence of electron--electron scattering, including the possibility of strong suppression. As a consequence extremely long electron coherence lengths and new spin-related phenomena are predicted. Since electron bands in III-V semiconductor quantum wires are in general spin-split in zero applied magnetic field, these new transport effects are of general importance.Comment: 11 pages, LaTeX and APS-RevteX 2, Rep.No. GF66,Figures from author, Physical Review Letters, scheduled for 7 June 199

An Australian longitudinal pilot study examining health determinants of cardiac outcomes 12 months post percutaneous coronary intervention

Background Percutaneous coronary intervention (PCI) is a very common revascularisation procedure for coronary artery disease (CAD). The purpose of this study was to evaluate cardiac outcomes, health related quality of life (HRQoL), resilience and adherence behaviours in patients who have undergone a PCI at two time points (6 and 12 months) following their procedure. Methods A longitudinal pilot study was conducted to observe the cardiac outcomes across a cohort of patients who had undergone a percutaneous coronary intervention (PCI). Participants who had undergone PCI 6 months prior were invited. Those participants who met the inclusion criteria and provided consent then completed a telephone survey (time point 1). These participants were then contacted 6 months later (i.e. 12 months post-intervention, time point 2) and the measures were repeated. Results All patients (n = 51) were recorded as being alive at time point 1. The multiple model indicated that controlling for other factors, gender was significantly associated with a linear combination of outcome measures (p = 0.004). The effect was moderate in magnitude (partial-η2 = 0.303), where males performed significantly better than females 6 months after the PCI procedure physically and with mood. Follow-up univariate ANOVAs indicated that gender differences were grounded in the scale measuring depression (PHQ9) (p = 0.005) and the physical component score of the short form measuring HRQoL (SF12-PCS) (p = 0.003). Thirteen patients were lost to follow-up between time points 1 and 2. One patient was confirmed to have passed away. The pattern of correlations between outcome measures at time point 2 revealed statistically significant negative correlation between the PHQ instrument and the resilience scale (CD-RISC) (r = -0.611; p < 0.001); and the physical component score of the SF-12 instrument (r = -0.437; p = 0.054). Conclusions Men were performing better than women in the 6 months post-PCI, particularly in the areas of mood (depression) and physical health. This pilot results indicate gender-sensitive practices are recommended particularly up to 6 months post-PCI. Any gender differences observed at 6 month appear to disappear at 12 months post-PCI. Further research into the management of mood particularly for women post-PCI is warranted. A more detailed inquiry related to access/attendance to secondary prevention is also warranted

Explaining the relationship between socio-economic status and interethnic friendships: The mediating role of preferences, opportunities, and third parties

Interethnic contact is important for social cohesion and has been shown to vary with people’s socio-economic status (SES). There is some evidence that SES has opposite effects on interethnic contact for non-Western ethnic minorities and for majority members in Western countries. Whereas minority members with a higher SES tend to have more contact with natives, natives with a higher SES tend to have less inter-ethnic contact. To replicate and further understand these contrasting findings, we focused on interethnic friendships in particular and tested simultaneousl