Wyniki wyszukiwania - BazTech

1

Constraints on variation of weight-shifting by foot during walking in adolescents with valgus alignment of hallux

Latour Ewa, Arlet Jarosław, Latour Marek, Dworak Lechosław B., Bohatyrewicz Andrzej

Acta of Bioengineering and Biomechanics

|

2020

|

Vol. 22, no. 3

95--104

EN

Purpose: Etiology of hallux valgus (HV) remains unclear and effective treatments and prophylaxis for this condition are lacking and conclusions of researches concerning HV are inconsistent. Recognition of the function-structure interrelation in foot at the early stage of valgus alignment of first metatarsophalangeus joint (1stMTPJ) would help explain the etiology of HV. Methods: The frequency of weight-shifting patterns during walking and the body mass index (BMI) were assessed relative to goniometric measurements of the 1stMTPJ angle in adolescents. Weight-shifting patterns were identified with a plantar pressure analysis, performed with the GaitlineMaxline Distance method. Results: As the 1stMTPJ angle widened, the frequency distributions of identified weight-shifting patterns became increasingly lopsided, due to the favoring or disfavoring of one pattern at the expense of the other. The two sexes showed opposite trends in the weight-shifting patterns that were favored/disfavored, relative to participants with a 0º 1stMTPJ angle. The clear predominance of a central-shift pattern, at the expense of a medial-shift, occurred with the largest (20º) 1stMTPJ angle among girls. Additionally, the BMI distributions associated with 1stMTPJ angle characteristics showed opposite trends between the sexes. Conclusions: Valgus alignment of 1stMTPJ among adolescents were associated with limitations in weight-shifting freedom of the foot during walking, that could be involved in maintaining balance. An 1stMTPJ angle of 20º, where distinct limitations were observed, might serve as a criterion of HV pathology.

2

Abdominal muscles activity during abdominal bracing and posterior pelvic tilt in women after natural birth and after caesarean delivery

Kuciel Natalia, Mazurek Justyna, Biernat Karolina, Pawik Łukasz, Sutkowska Edyta

Acta of Bioengineering and Biomechanics

|

2020

|

Vol. 22, no. 4

167--173

EN

Exercises after pregnancy can reduce the severity and risk of postnatal locomotor system disorders and muscular dysfunctions. The aim of the study was to evaluate electromyographic activity of abdominal muscles in women who gave birth naturally and via a caesarean section, and to compare it to a group of women who have never given birth. Methods: 27 women were included into the study after completing the personal questionnaire and functional examination. The surface electromyography during abdominal bracing and posterior pelvic tilt was used to test rectus abdominis muscles and internus oblique/ transversus abdominis muscles bilaterally. After normalization test, patients were asked to perform abdominal bracing and posterior pelvic tilt exercises. Results: Activity of rectus abdominis muscle is higher in posterior pelvic tilt compared to abdominal bracing. It should be noted that the internus oblique/transversus abdominis muscle activity in both exercises is similar. Conclusions: In women after natural birth and after a cesarean section who experienced no locomotor system symptoms, no statistically significant differences in abdominal muscle activity in both exercises were observed. In each group being studied, posterior pelvic tilt activated rectus abdominis muscles to a greater extent than just bracing.

3

Organiczna technologia płynów chłodzących dla silników gazowych.Jaka korzyść?

Deteree D.

Silniki Spalinowe

|

2006

|

R. 45, nr 2

73-77

PL

W artykule przedstawiono wyniki badań wpływu zastosowania płynu chłodzącego Coolelf Supra na stan wybranych części konstrukcyjnych silnika po jego długotrwałej eksploatacji. Stwierdzono, że płyn chłodzący ze składnikami organicznymi powoduje mniejsze zużycie tych elementów i poprawę właściwości chłodzących, co prowadzi do wydłużenia okresu eksploatacyjnego. Wskazano na przydatność systemu Total Dagofluid do monitorowania usterek silnika podczas jego pracy i serwisowania.

EN

Results of investigation of fluid coolant Coolelf Supra application on some engine parts in long-time running conditions have been presented in the paper. It was recognized, that organic additive coolant technology leads to smaller wear of engine parts, better cooling performance and longer engine life. The suitability of the "Diagofluid" system for monitoring of engine running or maintenance troubles has been stated.