Autocollimation sensor for laser-head position and velocity in reading data from optical disks

1993 ◽  
Vol 36 (4) ◽  
pp. 378-380
Author(s):  
L. M. Shashuk ◽  
M. I. Shribak
Keyword(s):  
Head Position ◽  
Laser Head ◽  
Optical Disks

Head Position Identification

1967 ◽  
Vol 10 (3) ◽  
pp. 438-448
Author(s):  
H. N. Wright
Keyword(s):  
Roc Curve ◽  
Head Position ◽  
Hearing Impaired ◽  
Type Ii ◽  
Experimental Conditions ◽  
Partial Explanation ◽  
Complex Sounds ◽  
Binaural Cues ◽  
Criterion Behavior ◽  
Stimulus Degradation

A binaural recording of traffic sounds that reached an artificial head oriented in five different positions was presented to five subjects, each of whom responded under four different criteria. The results showed that it is possible to examine the ability of listeners to localize sound while listening through earphones and that the criterion adopted by an individual listener is independent of his performance. For the experimental conditions used, the Type II ROC curve generated by manipulating criterion behavior was linear and consistent with a guessing model. Further experiments involving different degrees of stimulus degradation suggested a partial explanation for this finding and illustrated the various types of monaural and binaural cues used by normal and hearing-impaired listeners to localize complex sounds.

The percentage of migration as indicator of femoral head position

1988 ◽  
Vol 29 (3) ◽  
pp. 363-366 ◽  
Author(s):  
O. Eklof ◽  
H. Ringertz ◽  
L. Samuelsson
Keyword(s):  
Femoral Head ◽  
Head Position

The Comparison of Intrapartum Sonographic Signs and Digital Examination in Fetus with Cephalic Presentation

2020 ◽  
Vol 103 (11) ◽  
pp. 1178-1184
Keyword(s):  
Pregnant Women ◽  
Cross Sectional Study ◽  
Head Position ◽  
Vaginal Examination ◽  
Fetal Head ◽  
Cross Sectional ◽  
Percent Agreement ◽  
Anterior Position ◽  
Fetal Head Position ◽  
Digital Vaginal Examination

Objective: The agreement of fetal head position examined by digital vaginal examination (DVE) and intrapartum sonographic signs (ISS) in pregnant women during labor. Materials and Methods: A cross-sectional study was conducted. Two hundred eight-term singleton pregnant women attending labor at Ramathibodi Hospital, Thailand with the fetal cephalic presentation, cervical dilatation of 4 to 8 cm, station –2 or below and no contraindication for DVE were enrolled. The DVE evaluating fetal head position was performed by the third-year obstetrical residents. After DVE, ISS via transabdominal ultrasound for determining fetal head position was obtained immediately by the first researcher. The DVE report and the ultrasonographic images of ISS were recorded separately. The fetal head position based on ISS was designated by the second researcher blinded to the DVE result. The agreement of DVE and ISS for determining fetal head position was analyzed. Results: Two hundred eight pregnant women were analyzed. The fetal head position detected by DVE was consistent with that of ISS at 41.3% (p<0.001). The most percent agreement was observed in the fetus with left occiput anterior position at 72.7% (p<0.001). The lowest percent agreement was found in the direct occiput posterior at 14.3% (p=0.243). Parity, gestational age, current body mass index, epidural analgesia, cervical effacement, caput succedaneum, molding, and station did not significantly affect the discrepancy between DVE and ISS. Conclusion: The agreement between DVE and ISS for evaluating the fetal head position was low. The ISS might be considered for evaluating the fetal head position. Keywords: Fetal head position, Intrapartum sonographic sign, Digital vaginal examination

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