Results 81 to 90 of about 6,957 (218)

The minimal degree Kirchhoff index of bicyclic graphs

AIMS Mathematics
The degree Kirchhoff index of graph $ G $ is defined as $ Kf^{*}(G) = \sum\limits_{{u, v}\subseteq V(G)}d(u)d(v)r_{G}(u, v) $, where $ d(u) $ is the degree of vertex $ u $ and $ r_{G}(u, v) $ is the resistance distance between the vertices $ u $ and $ v $
Yinzhen Mei, Chengxiao Guo
doaj   +1 more source

On the positive and negative inertia of weighted graphs [PDF]

, 2013
The number of the positive, negative and zero eigenvalues in the spectrum of the (edge)-weighted graph $G$ are called positive inertia index, negative inertia index and nullity of the weighted graph $G$, and denoted by $i_+(G)$, $i_-(G)$, $i_0(G ...
Li, Shuchao, Song, Feifei
core  

ATHLETIC: An exoskeleton countermeasure exercise device for resistive and plyometric training in deep‐space missions

Experimental Physiology, EarlyView.
Abstract Prolonged exposure to weightlessness leads to loss of muscle and bone mass. Therefore, astronauts on board the International Space Station (ISS) currently perform mandatory daily exercises. ISS missions usually last 6 months, and future missions will become significantly longer when going, for example, to Mars.
Jonas Böcker, Jochen Zange, Torsten Siedel, Guillaume Fau, Sebastian Langner, Thomas Krueger, Jörn Rittweger   +6 more
wiley   +1 more source

Sharp Bounds of the Hyper-Zagreb Index on Acyclic, Unicylic, and Bicyclic Graphs

Discrete Dynamics in Nature and Society, 2017
The hyper-Zagreb index is an important branch in the Zagreb indices family, which is defined as ∑uv∈E(G)‍(d(u)+d(v))2, where d(v) is the degree of the vertex v in a graph G=(V(G),E(G)). In this paper, the monotonicity of the hyper-Zagreb index under some
Wei Gao, Muhammad Kamran Jamil, Aisha Javed, Mohammad Reza Farahani, Shaohui Wang, Jia-Bao Liu   +5 more
doaj   +1 more source

Haematological adaptations to high‐altitude and heat acclimation training in elite male cyclists

Experimental Physiology, EarlyView.
Abstract High‐altitude training is widely adopted by endurance athletes with the aim of increasing total haemoglobin mass (tHbmass) and thereby endurance exercise performance. However, divergent effects on tHbmass and exercise performance have been reported in athletes commencing altitude camps with initial high baseline levels for tHbmass, questioning
Claes Cubel, Magnus B. Klaris, Joakim V. Larsen, Raphaël Faiss, Lars Nybo, Carsten Lundby   +5 more
wiley   +1 more source

The extremal problems on the inertia of weighted bicyclic graphs [PDF]

, 2013
Let $G_w$ be a weighted graph. The number of the positive, negative and zero eigenvalues in the spectrum of $G_w$ are called positive inertia index, negative inertia index and nullity of $G_w$, and denoted by $i_{+}(G_w)$, $i_{-}(G_w)$, $i_{0}(G_w ...
Deng, Shibing, Li, Shuchao, Song, Feifei
core  

Impaired nitric oxide‐dependent endothelial function in young male individuals with obesity before the onset of symptoms and complications

Experimental Physiology, EarlyView.
Abstract Endothelial dysfunction drives obesity‐related complications. Doppler ultrasound measurement of blood flow during 1‐min passive leg movements (PLM) is a valuable non‐invasive tool for assessing endothelial function and nitric oxide (NO)‐mediated vasodilation.
Lucrezia Zuccarelli, Giovanni Baldassarre, Adele Bondesan, Diana Caroli, Roberta De Micheli, Gabriella Tringali, Thomas Favaretto, Joanna Suraj‐Prazmowska, Anna Kurpinska, Joanna Majerczak, Stefan Chlopicki, Jerzy A. Zoladz, Alessandro Sartorio, Bruno Grassi   +13 more
wiley   +1 more source

Endocrine and androgenic response to altitude training in professional cyclists

The Journal of Physiology, EarlyView.
Abstract figure legend Steroidal and endocrine variables are altered during altitude training. Abstract This study investigated endocrine and steroidal blood markers in 31 male elite cyclists monitored over 7 weeks, including a 3 week altitude training camp either at 2050 m (n = 19) or 3000 m (n = 12).
Raphael Faiss, Bastien Krumm, Claes Cubel, Magnus Bak Klaris, Lasse Vestli Baekken, Yvette Dehnes, Jenna Goodrum, Geoff Miller, James Spragg, Martin Faulhaber, Francesco Botrè, Carsten Lundby   +11 more
wiley   +1 more source

Fostering Creativity Through Educational Interventions in Higher Education: A Systematic Review

The Journal of Creative Behavior, Volume 60, Issue 1, March 2026.
ABSTRACT Creativity has gained relevance over the years in education, and especially recently due to its consideration as a transversal competency in higher education, but there is still a lack of integration of knowledge. This qualitative systematic review explores literature on educational interventions designed to enhance creativity and investigates
Carlota Rodríguez‐Silva, Jessica Cabrera Cuevas, Verónica Violant‐Holz   +2 more
wiley   +1 more source

On Sombor index and graph energy of some chemically important graphs

Examples and Counterexamples
Sombor index of a graph G=(V(G),E(G)) is provided by the expression ∑uv∈E(G)du2+dv2, where dx is the degree of the vertex x∈V(G). The energy of a graph is the quantity given by the total of the absolute values of its adjacency matrix’s eigenvalues.
Md Selim Reja, Sk. Md. Abu Nayeem
doaj   +1 more source