In this article we prove a special case of a conjecture of A. Abrams and R. Ghrist about fundamental groups of certain aspherical spaces. Specifically, we show that the n−point braid group of a linear tree is a right angled Artin group for each n.

The dependence of gastric mucosal structure and function on hormonal activity has been the subject of many investigations (Welbourn and Ward, 1962; Zollinger and Craig, 1960; Grossman, 1950). The conflicting nature of experimental findings and interpretations, particularly as related to the effect of adrenal cortical hormones on gastric secretion, is reflected in many articles reviewing this su...

Needle insertion is a minimally invasive technique in diagnosing and treating tumors. However, to perform a surgery accurately, the tissue should have minimum amount of displacement during needle insertion so that it reaches the target tissue. Therefore, the tissue membrane has to move less to decrease rupturing under the membrane. In this study, the effect of different design parameters on dis...

results the rate of first-time successful spinal needle insertion was not significantly different between the clsp and tsp groups (62.9% versus 55.7%, p > 0.05). ease of landmark palpation in the clsp group was not significantly different from that in the tsp group (86.7% versus 76.4%, p > 0.05). the number of needle-bone contacts in both groups were not significantly different (p > 0.05). the ...

ABSTRAK Artikel ini membahas ideologi dan aparatus negara dalam tiga cerpen karya Putu Wijaya. Penelitian menggunakan paradigma Abrams, yaitu pendekatan objektif diskurtif. Pendekatan digunakan untuk menganalisis unsur-unsur intrinsik diskurtif membongkar dengan perspektif Louis Althusser. Pengumpulan data dilakukan studi pustaka mengandalkan jenis kualitatif. Hasil penelitian menujukkan bahwa ...

Background and aims: Needle stick injuries are a common and serious occupational hazard in the medical settings. So, this study was aimed to assess the incidence of needle stick injury among medical students at Tabriz Imam Reza Hospital in 2014. Methods: This is a cross-sectional study which its data was collected from 211 medical students in Tabriz Imam ...