Optimizing Fungicide Timing for the Control of Rhizoctonia Crown and Root Rot of Sugar Beet Using Soil Temperature and Plant Growth Stages.

Azoxystrobin is applied early in the sugar beet growing season in north-central United States for control of Rhizoctonia damping-off and Rhizoctonia crown and root rot caused by Rhizoctonia solani anastomoses groups (AGs) 4 and 2-2, respectively. Fungicide application timings based on crop growth stage and soil temperature thresholds were evaluated in inoculated small-scale trials and in commercial fields with a history of Rhizoctonia crown and root rot. Soil temperature thresholds of 10, 15, and 20°C were selected for fungicide application timings and used to test whether soil temperature could be used to better time applications of azoxystrobin. In both small- and large-plot trials, timing applications after attainment of specific soil temperature thresholds did not improve efficacy of azoxystrobin in controlling damping-off or Rhizoctonia crown and root rot compared with application timings based on either planting date, seedling development, or leaf stage in a susceptible (E-17) and a resistant (RH-5) cultivar. Application rate and split application timings of azoxystrobin had no significant effect on severity of crown and root rot. Other environmental factors such as soil moisture may interact with soil temperature to influence disease development. Cv. RH-5 had higher sugar yield attributes than the susceptible cultivar (E-17) in seasons conducive and nonconducive to crown and root rot development. All isolates recovered from both small- and large-plot trials in all years were AG 2-2. R. solani AG 4 was not identified in any samples from any year.

[Incoherence as an interaction phenomenon. Results of a single case study]. / Inkohärenz als Interaktionsphänomen. Ergebnisse einer Einzelfallstudie.

Traditionally psychiatric patients' change of topic occurring in interviews e.g. with a doctor are construed as a psychopathologically relevant type of incoherence (formal thought-disorder). In a single case study it can be shown, however, that more than half of the patient's changes of topic occur after a specific class of interactionally meaningful paraverbal features. These may be interpreted as signals of the patient's being ready to relinquish the speaker's role. Therefore, rather than interpreting this type of change of topic as thought-disordered incoherence it should be considered as a consequence of the patient's unsuccessful trying to take over the listener's role. In contrast to interactively unmarked (thought-disordered) changes of topic the occurrence of this phenomenon may be determined by the asymmetric doctor-patient relationship.

Wearable digital speech processor for cochlear implants using a TMS320C25.

Based on a single-chip DSP (TMS320C25, Texas Instruments) a programmable battery-operated sound processor with a digital encoder interface for the Nucleus-22 cochlear implant (CI) was built. The number of quasi-simultaneously addressed electrodes is only limited by the selected pulse width and the maximum rate of stimulation and can be as high as 10 electrodes at 300 Hz repetition rate. Implementation of various processing strategies (formant or channel vocoder, filterbank, zero crossings, etc.) is possible as well as sophisticated adaptive noise reduction. Programs and stimulation parameters are stored in electrically erasable memory and may be updated via a host computer. The built-in analog output may be used for single-channel stimulation or acoustic verifications of the sound processing algorithms. The power consumption with current 16K word data memory and at maximum stimulation rate is about 1 Watt, which necessitates recharging of batteries after 11 h.

[Control of verbal exchange in physician-patient consultation. A single case study]. / Zur Steuerung des Sprecherwechsels in einem Arzt-Patient-Gespräch. Eine Einzelfalluntersuchung.

Following theoretical considerations by Sacks et al. (1974) and Duncan & Fiske (1977) a method for the analysis of turn-taking in dialogues is proposed. This method is used in a pilot case study of a dialogue between a doctor and his patient. The conservation is segmented into single utterances (units of analysis) within which so called speaker-relevant control signs (tags, questions, speech pauses) as well as listener-relevant control signs (hearer signals) are defined and localized. Based on this analysis the transcript of the dialogue is entered into a data base. The distribution of speaker- and listener-relevant control signs and their relation to turn-taking lead to the conclusion that the two partners of dialogue "bargain" for the takeover of the floor within a process of communication.