Autor: Helvaci, M. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Fluidity Characteristics of A201 and A206 Al-Cu Alloy
Autorzy:: Yildirim, K.
Helvaci, M.
Gürsoy, Ö.
Erzi, E.
Kahruman, C.
Dispinar, D.
Powiązania:: https://bibliotekanauki.pl/articles/380959.pdf
Data publikacji:: 2018
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: Al-Cu alloy
casting
fluidity of alloy
mould coating
stop Al-Cu
odlew
lejność stopu
forma odlewnicza
Opis:: Al-4.5Cu alloys are widely used in aerospace industries due to their low weight and high mechanical properties. This group of aluminium alloys is known as 2xx series and exhibits the highest mechanical properties however this alloy is known to suffer from feedability and high tendency for hot tearing. Al-Si alloys (3xx) have improved fluidity and better feedability particularly by several modifications such as Ti, B or Sr. Eutectic temperature is decreased and mechanical properties can be enhanced. Yet, the strength values of this alloy group cannot reach the values of 2xx series. Therefore, in this study, the effect of Ag addition on the fluidity of Al-4.5Cu alloy has been investigated. Standard size spiral mould was used. The casting temperature was selected to be 770^oC. Five castings were made and Weibull statistical approach was used to evaluate the results. In addition, coating of the die with BN was also investigated. It was found that Ag addition and BN coating of the die revealed the most reproducible, reliable and high fluidity values.
Źródło:: Archives of Foundry Engineering; 2018, 18, 1; 135-138
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Tytuł:: Opinions of nephrology nurses about death concept
Autorzy:: Dönmez, Ç.F.
Yılmaz, M.
Helvacı, İ.
Powiązania:: https://bibliotekanauki.pl/articles/1917338.pdf
Data publikacji:: 2015
Wydawca:: Uniwersytet Medyczny w Białymstoku
Tematy:: death concept
Nursing
nephrology nurses
opinion
Death
Opis:: Introduction: Dialysis patient had experienced the fear of pain and suffering, loneliness and fear of death. The high mortality rate in these patients indicates that about one-fourth of them are in their last year of life, suggesting the presence of death and dying in the haemodialysis unit. Nephrology nurses play an important role in these patients and their families in dealing with the fear of death and accepting the reality of death. Purpose: To determine the opinions of nephrology nurses about death concept.Materials and methods: This was a descriptive study conducted among nurses. A total of 68 nurses working on the hemodialysis units of public hospitals in Turkey completed the questionnaire. The tool used in the study was the Scale of Thorson-Powell Death Anxiety, the Scale of Death Related Depression and the Scale of Attitude Towards Death and Dying Patient. The results were analyzed statistically and p<0.05 was accepted as statistically significant. Results: Nephrology nurses had a medium-level avoidant attitude towards dying patient and their emotional state was depressive. They experienced medium-level death anxiety, the death related anxiety and depression and avoidant attitude towards the patient were found more in female nurses compared to male nurses. The nurses who worked for 1-10 years have less DRDS scores than nurses who worked for 20 years or above. İn addition nurses had an avoidant attitude towards dying patients as their DRDS and TPDAS scores increased. Conclusions: It can be suggested that nephrology nurses should be given training on how to take care of dying patients, and the continuity of this in-service training should be ensured.
Źródło:: Progress in Health Sciences; 2015, 5, 1; 63-68
2083-1617
Pojawia się w:: Progress in Health Sciences
Dostawca treści:: Biblioteka Nauki

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