The physiological reactions to cold of nine female Caucasians were examined and compared with the reactions of a sample of male Caucasians. The experiment was conducted in the climatic chamber of the Applied Physiology Laboratory at air temperatures of 27 and 5 C, with a wind velocity of 80–100 ft/min. The sample of nine did not provide for intermediate temperature studies. The metabolic rates of the females were lower than those of the males, at both 27 and 5 C, but when expressed per square meter no differences were found. Finger and toe and rectal temperatures were the same for both sexes at 5 C, but the average female finger temperature was lower than that of the males at 27 C. The average female skin temperature was 2 C lower than that of the males. This indicates a greater subcutaneous insulation for females and this is confirmed by skinifold measurements. Both Caucasian sexes therefore display an increase in rectal temperature with fall in air temperature, which contrasts markedly with the Bantu and Bushman, both of whom show a decrease in rectal temperatures. Caucasian females and cold; cold responses of Caucasian females Submitted on September 17, 1963

No abstract

The efficiency and the life rating are essential characteristics of mechanical drives. The traction drives with proper geometry can avoid the geometrical slip and their efficiency can exceed that of the gear drives. The elements has hardened steel surfaces, the lubricant is rheopectic. There is no danger for thinning the oil film and consequently for connecting the asperities. The traction drives are relatively noiseless, they are applicable for increasing speed in particular. There are some problems to be solved in friction drive. This is the necessity of clamping force. A simple machine element usually make a constant clamping force, a tensioning mechanism can be too complicated. The ideal solution is a simple design which assure a clamping force that is proportional to the instantaneous external load requirements. The authors suggest a modified machine element – a helical torsion spring, an elastic one, instead of the original, rigid annular wheel – that comprises both the driving and clamping functions, and the latter one is proportional to the external load, so that the principle of self-help operates.

An inflammation of the corpus cavernosum is relatively rare and must be differentiated from a tumour, abscess, thrombosis or embolism of the penile vessels. Most frequently inflammation of the corpus cavernosum is caused by iatrogenic interventions, followed by general infections and acute occlusion of penile vessels. Diabetes mellitus seems to be a predisposing factor. In the case of a 51-year-old diabetic patient with painful induration of the penis, an MR imaging study was undertaken to identify an inflammation of the corpora by exclusion of abscess formation. The inflammation responded well to a two-week oral Fluorchinolon treatment. Due to its high soft-tissue contrast, multiplanar layer images and, the MR scan was performed to identify an inflammation of the corpora cavernosa and to exclude an abscess formation. We consider a therapy with oral antibiotics to be sufficient for a non-abscess-forming cavernitis.

A hullámhajtómű leginkább igénybe vett eleme a hullámkerék. Terhelését, anyagának fáradását a vele kapcsolódó elemek erősen befolyásolják. Ilyen befolyásoló elem a bütyök is, mely a hajlékony csapágynak átadott alakváltozáson keresztül hat rá. Ahogy a hajlékony csapágy belső gyűrűjének görbülete változik, pontjai érintő irányban elmozdulnak, adott pontjaihoz tartozó normálisai elfordulnak, ugyanúgy a csapágy külső gyűrűjén is megjelennek ezek a változások, valamint a reá illesztett hullámkerékben is. A bütyök és a belső csapágygyürü érintkezési pontjai elvileg nem mozdulnak el egymáshoz képest, ha eltekintünk a köztük meglévő hézagtól. A csapágy külső gyűrűjének és a hullámkeréknek a kapcsolatáról ugyanez mondható el. Azonban amíg a belső gyűrű egyetlen deformálását nem követi újabb, a külső gyűrű és a hullámkerék deformálása folyamatosan, minden egyes körülfordulás alatt végbemegy. Fogazott kerekek esetén a fogak elfordulása követi a külső gyűrű normálisának elfordulását, ezért mindéképpen szükséges az eddigi adatok birtokában a külső csapágygyürü és a hullámkerék-alak meghatározása-pusztán a bütyök deformáló hatásából adódóan-, melyre azután a külső terhelésből adódó alakváltoztató hatás szuperponálandó. Jelen dolgozat előtanulmánynak tekinthető a kapcsolódó hullámkerék-fogak tartományának, a terheléseloszlásnak és fogdeformációknak számításához.