95 research outputs found
An Analysis of a Nonverbal Training Program\u27s Effect Upon Business Communications Students\u27 Sensitivity to Nonverbal Facial Expressions
Problem. The problem of this study was to determine if a specific training program in nonverbal facial communication for business communications students affects their sensitivity to nonverbal facial cues. A secondary problem was to determine if there was a difference between those groups trained in nonverbal facial communication and their sensitivity to para-language and kinesics (areas that received no formal training) and groups who received no such formal training.
Procedures. The study was conducted during the second semester of the 1982-83 school year. The study involved eight business communication classes, four teachers, and two post-secondary schools.
Of the 202 students who participated in the study, 111 were males and 91 were females. The 110 control students were administered the Profile of Nonverbal Sensitivity Test (PONS) as a pretest and a posttest. The experimental groups were also given the pretest and posttest along with three 45-minute training sessions in nonverbal facial communication.
The data collected from the 220-point PONS pretest and posttest were analyzed using analysis of variance and analysis of covariance. Data collected on a self-ranking score was analyzed using the Spearman Correlation Coefficient.
Conclusions. The following conclusions are based on the findings which were presented in chapter 4. (1) It can be concluded that when using the methodology, materials, and population of this study that students trained in nonverbal facial communication showed no significant difference in their sensitivity to kinesic and facial nonverbal cues. (2) It can be concluded that when using the methodology, materials, and population of this study that no matter how a student ranked him/herself in decoding nonverbal cues, he/she did not perform significantly better than those who did not rank themselves as high in decoding nonverbal cues. (3) It can be concluded that when using the methodology, materials, and population of this study that males and females trained in nonverbal facial communication improved significantly in their ability to decode paralanguage cues. (4) It can be concluded that when using the methodology, materials, and population of this study that there was no significant relationship between the ranked scores in sensitivity to nonverbal cues and the PONS posttest scores
On the sound field of a point-shaped sound source in uniform translatory motion
A rigorous analysis presented of the excitation of sound by point sources moving in uniform translatory motion at subsonic or supersonic velocities through a two- or three-dimensional medium at rest. The construction of surfaces of constant phase is based upon Huyghens' principle in such a manner that the propagation in the medium at rest of the elementary waves emanating from the sound source is independent of the momentary state of motion of the sound source. Hence, characteristic traits of the sound propagation may be understood even on the basis of simple geometric constructions
Pelvic Girdle Reconstruction Based on Spinal Fusion and Ischial Screw Fixation in a Case of Aneurysmal Bone Cyst
A case of lytic lesion of the pelvis in a 23-year-old woman is presented. A biopsy led to the diagnosis aneurysmal bone cyst
(ABC). Due to the histologically very aggressive growth of the tumor, a low malignant osteosarcoma could not be excluded.
In an initial operation the tumour, affecting the sacrum, the iliac crest and the lower lumbar spine was resected. Temporary
restabilisation of the pelvic ring was achieved by a titanium plate. The histological examination of the entire tumour
confirmed the diagnosis ABC. After 6 months, the MRI showed no recurrence. The observed tilt of the spine to the operated
side on the sacral base prompted a second surgical procedure: a transpedicular fixation of L5 and L4 was connected via bent
titanium stems to the ischium, where the fixation was achieved by two screws. This construction allowed the correction of the
base angle and yielded a stable closure of the pelvic ring. The patient has now been followed for 6 years: the bone grafts have
been incorporated and, in spite of radiological signs of screw loosening in the ischium, the patient is fully rehabilitated and
free of symptoms. Pedicle screws in the lower spine can be recommended for fixation of a pelvic ring discontinuity
Cosmological model with macroscopic spin fluid
We consider a Friedmann-Robertson-Walker cosmological model with some exotic
perfect fluid with spin known as the Weyssenhoff fluid. The possibility that
the dark energy may be described in part by the Weyssenhoff fluid is discussed.
The observational constraint coming from supernovae type Ia observations is
established. This result indicates that, whereas the cosmological constant is
still needed to explain current observations, the model with spin fluid is
admissible. For high redshifts the differences between the model with
spin fluid and the cold dark matter model with a cosmological constant become
detectable observationally for the flat case with .
From the maximum likelihood method we obtain the value of
. This gives us the limit
at the level. While the model with
``brane effects'' is preferred by the supernovae Ia data, the model with spin
fluid is statistically admissible. For comparison, the limit on the spin fluid
coming from cosmic microwave background anisotropies is also obtained. The
uncertainties in the location of a first peak give the interval . From big bang nucleosynthesis we
obtain the strongest limit . The
interconnection between the model considered and brane models is also pointed
out.Comment: RevTeX4, 15 pages, 10 figures; some minor change
Biomechanics and anterior cruciate ligament reconstruction
For years, bioengineers and orthopaedic surgeons have applied the principles of mechanics to gain valuable information about the complex function of the anterior cruciate ligament (ACL). The results of these investigations have provided scientific data for surgeons to improve methods of ACL reconstruction and postoperative rehabilitation. This review paper will present specific examples of how the field of biomechanics has impacted the evolution of ACL research. The anatomy and biomechanics of the ACL as well as the discovery of new tools in ACL-related biomechanical study are first introduced. Some important factors affecting the surgical outcome of ACL reconstruction, including graft selection, tunnel placement, initial graft tension, graft fixation, graft tunnel motion and healing, are then discussed. The scientific basis for the new surgical procedure, i.e., anatomic double bundle ACL reconstruction, designed to regain rotatory stability of the knee, is presented. To conclude, the future role of biomechanics in gaining valuable in-vivo data that can further advance the understanding of the ACL and ACL graft function in order to improve the patient outcome following ACL reconstruction is suggested
Navigated cup implantation in hip arthroplasty: A meta-analysis
Background and purpose Many studies have suggested that navigation-based implantation can improve cup positioning in total hip arthroplasty (THA). We conducted a systematic review and meta-analysis to compile the best available evidence, and to overcome potential shortcomings because of small sample sizes in individual studies
Robotic surgery: disruptive innovation or unfulfilled promise? A systematic review and meta-analysis of the first 30Â years
Water-jet-cutting in orthopedic surgery
Bei verschiedenen orthopÀdischen Operationen,finden sich Probleme, die den Trennprozess betreffen: bei der mikroinvasiven Nukleotomie wird der Nukleus pulposus durch einen kleinen Arbeitskanal abgetragen. Mechanische Werkzeuge oder ein LASER erlauben keinen gewebeselektiven Materialabtrag, und bergen die Gefahr andere Gewebe, wie z.B. den Anulus fibrosus zu schÀdigen.
Bei der Endoprothesenrevision muss gesunder Knochen geopfert werden, weil bisher bekannte Trennverfahren fĂŒr den Materialabtrag im Spalt zwischen Knochen und Prothese ungeeignet sind. Bei der Endoprothesenimplantation oder der Osteotomie fehlt bisher ein athermisches Trennverfahren mit hoher geometrischer Genauigkeit. Das Trennen mit HochdruckflĂŒssigkeitsstrahlen hat sich u.a. beim Bearbeiten von thermosensiblen Verbundwerkstoffen bewĂ€hrt. Der entscheidende Vorteil einer medizinischen DWS-Anwendung liegt in der Möglichkeit des selektiven Materialabtrags und im athermischen Trennprozess.
Ziel der vorliegenden Arbeit war es, die Eignung der DWS-Technik fĂŒr operative Trennprozesse in der OrthopĂ€die zu hinterfragen und den Materialabtragsprozess im Gewebe zu untersuchen
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