Table 5 - uploaded by Perica Vasiljević
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Percentage of hair color, eye color and shape of the earlobe and χ2 values(the total sample) 

Percentage of hair color, eye color and shape of the earlobe and χ2 values(the total sample) 

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Craniofacial characteristics are used to identify similarities and differences between human populations or within a single population. The aim of this study is to provide data on the differences/similarities between two groups of subjects, left-handed and right-handed children, based on the parameters that determine the phenotypic characteristics...

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... This can be explained by the fact that, when working with the circular saw, the dominant hand holds the machine, while the non-dominant hand holds the material being cut, near the blade, which is in correlation with the results presented in the study by Hassine et al. [1]. The population of Serbia is predominantly right-handed [10]. When working with table circular saws, both hands are at equal risk [9]. ...
... Ovaj podatak se može objasniti činjenicom da se, pri radu sa ručnim cirkularom, mašina drži u dominantnoj ruci, a da se nedominantnom rukom pridržava materijal u blizini sečiva, što je u korelaciji i sa rezultatima u radu Hasina i saradnika [1]. Populacija u Srbiji je uglavnom desnoruka [10]. Pri radu sa stonim cirkularima, pod podjednakim rizikom su obe ruke [9]. ...
Article
Introduction: Hand injuries are extremely common. It is estimated that almost a quarter of all injuries treated in the emergency department are hand injuries, due to the fact that the hand is highly exposed to trauma, as the result of its function and its protective movement. These injuries are usually seen in the young working age population, and they involve simultaneous damage to several different tissues. Aim: The purpose of this study is to evaluate the frequency and characteristics of hand injuries sustained by the circular saw, as well as to assess existing risk factors, in order to improve the prevention of these injuries. Materials and methods: This is a retrospective study involving 365 patients, treated during a five-year period. The patients suffered hand injury with a circular saw, either at home or at work. All patients were surgically treated at a single medical center. The patients were mostly men, with an average age of 48.6 ± 14.71 years. The data, which was collected from the medical records, included localization and type of injury, dominance of the injured hand, the type of surgical procedures performed, and the length of hospital stay. Results: The non-dominant hand was injured more often (62%), and this was usually the left hand (60%). The majority (83.2%) of patients were injured at home, while significantly less patients were injured in the workplace (16.7%). Most often, the patients sustained injuries to several different tissues, while there were only 12.5% of isolated injuries. The most commonly injured structures were extensor tendons of the wrist and fingers (245), followed by phalanges (226). Most of the patients sustained injury to one finger (35.1%), especially the thumb (68.4%), while two fingers were injured in 35.1% and three fingers in 20% of cases. The hand was injured in 7.27% of the cases, and the forearm was injured in 5.45% of the cases. Of the 995 surgical procedures carried out in total, the most commonly performed operation was tenorrhaphy (44.67%), followed by fracture fixation (29.3%). Finger reamputation was performed in 6.67% of cases, neurorrhaphy in 6%, and tendon reinsertion in 4% of cases. There was a total of 46 replantations (4.67%), and 27 revascularizations (2.67%). The average length of hospital stay was 9.04 ± 3.91 days. Conclusion: Working with a circular saw is a high-risk activity. The injuries sustained are severe. They can result in significant functional deficit and have major socioeconomic consequences. Lack of prior training and improper handling are clear risk factors. Clinical and epidemiological analysis is therefore of extreme importance, as it can be the key to the prevention of these injuries.
... Characteristics of the-head are partly-determined by genetic-factors (Mckeever, 2000), but they can-also be- affected by gender, nutrition, climatic, geographic and socioeconomic-factors, and health-care; so they occur as a-result of interaction of genetic and environmental-factors (Cvetkovic & Vasiljevic, 2015). ...
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The-aim of this-research was to-design and prototype a-chin-strap-device, which can-be-used to-manage largely-untapped local-population of open-mouth-habitual-snorers. Document-analysis was utilized as one of the-study-instruments (including review of: (i) selected-International-patents on the-designs of chin-strap device; (ii) published-research on head-gear, head-products, and the-use of anthropometric-data in their-design; and (iii) prior-art on chin-strap-devices and their-respective-limitations). Target-specifications/ objectives of chin-strap-device were formulated from the-document-analysis, while Pair-wise-Comparison Charts were-used, to-rank the-importance of the-objectives, in the-different-levels. This-study also used such-basic-tools-as pencil and paper, for sketching, of the-alternative-designs; and a-database, as a-tool for information-storage and retrieval. Besides, the-study applied fundamental-Engineering-principles of product design, and was-carried-out in-compliance-with both; ISO8559: 1989 (Garment-construction and anthropometric-surveys-body-dimensions), and ISO7250: 1996 (Basic-human-body-measurements for technological-design). The-best-ranked-design (out of the-3 alternatives made) was chosen, via Engineering numerical-weighted-decision-Matrix and 'Drop and Re-vote' (D&R) method. 13 head-dimensions, and ahead of a-medium-size, and of normal-shape, for 50 th percentile, black-African-male, of over 40 years of age, was selected, as a-design-target. The-values, for these-head-dimensions (one-dimensional measurements), were obtained from IOM and Anthrotech anthropometric-data-tables, for civilian-population. 2D-drawings, of the-selected-alternative, were created via computer-aided-design (CAD) AutoCAD-software. The-fibre, from which the-final-fabric, to-be-made, for a-chin-strap-device, was designed discretely of the-product-design-process, and then was-incorporated, into-the-design, as a-finished input/fabric-structure. This-study also adopted 'analysis' method of materials-selection. The-main objectives, of the-intended-device, was used as a-guide, in-materials-selection. Acrylic man-made textile-fibre was selected, via computerized-materials-databases/libraries; and afterwards the-woven-fabric of plain-weave was-chosen as main-material, for the-device. The-fabrication and assembly, of the-prototype, was achieved via stitching-joining-method. Traditional-testing/usability-inspection (by dynamic-verification) was conducted on a-volunteer (open-mouth-snorer); observers reported, that some-snoring reduction was noticeable, in-comparison with the-observations, of the-volunteer, sleeping, without the-device, moreover, the-device stayed-in-position (without sliding-off), during the-five-observation-nights. Overall, the-result of this-preliminary-design is somewhat-optimistic, further-improvement(s) and trials, however, are necessary. The-study, hence, further-recommended to: (1) carry-out a-detailed-design; (2) fabricate the-next/refined-prototype(s); (3) conduct explorative-use-ability-trials, in-collaboration-with the-department of Medical-Engineering, School of Medicine, MU; and (4) analyze the-marketing-aspect of the-design.
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The skill of writing with the left or right hand is often taken as a hand lateralization predictor. Taking into consideration that such a manifestation is usually practiced, left-handedness often becomes 'concealed', making it harder to be phenotypically measured. The aim of this study is to determine the predictability of multiple manual skills in relation to the type of handedness. The sample of 756 primary-school students with the aid of Edinburgh Handedness Inventory showed that writing and drawing skills using a particular hand have a very clear mutual correlation (0.86 with the left-handed, and 0.50 with the right-handed). However, the correlation was not determined with other observed unimanual skills, such as throwing, using scissors, using a tooth brush, using a key and holding a glass. In addition to that, writing as such is not a reliable hand lateralization predictor. In relation to hand lateralization, writing shows a low determination coefficient with the left-handed, whereas for other skills R2 varies within the range 0.43-0.66. The numbers are similar to the right-handed, where R2 varies within the range 0.28-0.53, for all skills, except writing and drawing. A conclusion can be drawn that writing is not a reliable predictor of lateralization to left or right, but that those are skills in relation to which there is no cultural pressure.
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Handedness (dominant arm) is a term used to describe the ability of using right or left arm not only for writing but also for performing delicate and precise tasks. In fact, dominant arm appears even in prehistoric time. From the aspect of evolution, dominant arm is seen as an ability which correlates with speech development, and as such is related to cerebral lateralization. However, various cognitive disorders are connected to the dominant arm. The influence of inheritance and environment are equally important for the dominant arm, however their influence prevents us to determine how a certain arm becomes dominant.