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Prediction of SAR of electromagnetic radiation due to virtual reality headsets in the human head

100%

Poungsri P. , Pechrkool T. , Pruksanubal A. , Akkaraekthalin P.

tom R. 96, nr 9

171--175

Virtual reality (VR) headsets, 5G device, expose electromagnetic radiation to the human head led to concerns about the health effects. The purpose of this study is to predict the specific absorption rate (SAR) due to VR headsets in the human head. The study involves two biological models. Model A is a flat specific anthropomorphic mannequin (SAM). Model B is Model A inserted with a designed brain. The results are found that the SAR of model B is higher than that of model A, under the standard limits and not affected by temperature, short term memory, or memory load.

Urządzenia wirtualnej rzeczywistości generują pola elektromagnetyczne. W artykule analizowano współczynnik SAR takich urządzeń dla dwóch modeli.

Irlandzka architektura jako wyraz wartości kulturowych

86%

Gierek B.

nr 14

153–172

The architecture in Ireland has been developed in various periods: from megalithic times, through antiquity, the Middle Ages, to modern times. Irish architecture has preserved elements of three significant cultures flourishing in Ireland which Seán Ó Duinn calls “three streams”: the megalithic, the Celtic and the Christian cultures. With the Celtic culture is connected the term “Celtic spirituality” which is expressed in: affirmation of life and creature, harmony of man with nature and cosmos, and above all in the divine presence in the world and in human life. The author of this article also indicates to its manifestation in Irish architecture. The author of the article characterises selected elements of Irish architecture, pointing to their meaning, like: circularity in general, circle (as a solar symbol), stone, corbel technique, round tower, Celtic cross, human head, sheela-na-gig. The author based her study on historical, archaeological and literary sources, supplemented with her own field works conducted in Ireland in 1995–2016.

The clinical significance of the petroclinoid ligament

72%

Skrzat J. , Walocha J. , Jaworek J. K. , Mroz I.

tom 66

nr 1

This report describes the topography and structure of the petroclinoid ligament with reference to its clinical significance. Observations of this ligament were performed on 24 sections of human heads. Remnants of the ossified form of this ligament were sought in 73 dry human skulls. It was found that the petroclinoid ligament existed as an anterior and posterior fold of the dura mater and stretched from the petrous apex and the anterior and posterior clinoid process respectively. We assessed the close proximity of this ligament to the oculomotor nerve. In one case we found a partially ossified posterior petroclinoid ligament, which appeared as a bony spike that arose posteriorly and inferiorly from the posterior clinoid process.