Results 31 to 40 of about 55,893 (253)

Limit cycles for Singular Perturbation Problems via Inverse Integrating Factor

Boletim da Sociedade Paranaense de Matemática, 2008
In this paper singularly perturbed vector fields X_{varepsilon} defined in R^2 are discussed. The main results use the solutions of the linear partial differential equation X_{varepslion}V = div(X_{varepslion})V to give conditions for the existence of limit cycles converging to a singular orbit with respect to the Hausdorff distance.
Llibre, Jaume, Medrado, João C.R., Da Silva, Paulo R.   +2 more
openaire   +5 more sources

On Hierarchical Composite Endpoints in Pediatric Cancer Supportive Care: Illustrative Examples From Two Multi‐Center Phase‐III Randomized Clinical Trials

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Pediatric supportive care clinical trials often involve multiple clinically important outcomes, complicating trial interpretation. Hierarchical composite endpoints (HCEs) provide a framework to integrate key outcomes according to clinical importance.
Willem H. Collier, Mark Zobeck, Adam J. Esbenshade, Christopher C. Dvorak, Lillian Sung, David Freyer, Sarah Alexander, Etan Orgel, Nicole J. Ullrich, Zach Prudowsky, Brian Fisher, Caitlin W. Elgarten   +11 more
wiley   +1 more source

Existence of an inverse integrating factor, center problem and integrability of a class of nilpotent systems

Chaos, Solitons & Fractals, 2012
We characterize the nilpotent systems whose lowest degree quasi-homogeneous term is (y,σxn)T, σ=±1, having a formal inverse integrating factor. We prove that, for n even, the systems with formal inverse integrating factor are formally orbital equivalent to (x˙,y˙)T=(y,xn)T. In the case n odd, we give a formal normal form that characterizes them.
Algaba Durán, Antonio, García García, Cristóbal, Reyes Columé, Manuel   +2 more
openaire   +3 more sources

Forecasting the Dialysis Burden in Japan: Validation‐Based Projections of Prevalence and Incidence Through 2050

Therapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Background Japan has one of the highest dialysis prevalence rates worldwide and a shrinking, aging population. Whether dialysis burden has entered a sustained post‐peak phase or whether recent declines partly reflect pandemic‐related disruptions remains uncertain.
Hatice Şahin, Berrak Itır Aylı, Nüket Paksoy   +2 more
wiley   +1 more source

An Enhanced Reptile Search Algorithm for Inverse Modeling of Unsaturated Seepage Parameters in Clay Core Rockfill Dam Using Monitoring Data during Operation

Mathematics
The seepage characteristics of clay core walls are crucial for the seepage safety of core rockfill dams, with the permeability coefficient in the unsaturated zone being nonlinear.
Zhangxin Huang, Zhenzhong Shen, Liqun Xu, Yiqing Sun   +3 more
doaj   +1 more source

From mice to humans—divergent strategies for intestinal homeostasis and regeneration

FEBS Letters, EarlyView.
Recent advances such as organoid genome editing, xenotransplantation, imaging, and whole‐genome sequencing have enabled direct studies of human intestinal stem cells (ISCs). These studies reveal species‐specific features, including slower ISC proliferation, distinct injury responses, slower somatic mutation accumulation in humans, and an inverse ...
Keiko Ishikawa, Shinya Sugimoto, Toshiro Sato   +2 more
wiley   +1 more source

Research on Optimization of Control Strategy for Energy Storage Systems Considering Battery State of Charge

发电技术
ObjectivesDistributed energy storage systems exhibit slow state of charge (SOC) equalization and low current distribution accuracy due to inconsistency in the SOC and capacity among battery cells.
WANG Mingqi, XIA Xiangyang, ZHAO Xiaoyue, HUANG Ru, DENG Hualong, LIU Daifei, CAI Yukuan   +6 more
doaj   +1 more source

Design and analysis strategies for robust microbiome ageing research

FEBS Letters, EarlyView.
The gut microbiome changes with age and associates with age‐related morbidity and mortality, establishing it as a potential biomarker and intervention target for ageing. Realising this potential requires methodological rigour, yet distinguishing biological signals from methodological artefacts remains challenging across cohorts. This review provides an
Mark Olenik, İsmail Güderer, Yi Wang, Tayyaba Alvi, Prasoon Pandey, Handan Melike Dönertaş   +5 more
wiley   +1 more source

Food-specific IgG antibodies and body mass index: multivariate analysis of clinical correlations in underweight populations

Frontiers in Immunology
BackgroundThis study investigates the relationship between food-specific IgG antibodies and nutritional status in underweight populations, addressing a critical gap in existing research focused predominantly on obesity.
Yao-Chi Zeng, Cui-Yu Li, Xiao-Li Song, Shu-Fen Huang, Yi Xie, Juan Zeng, Rui Yuan   +6 more
doaj   +1 more source

Yoga as an integrative approach for prevention and treatment of oral cancer

International Journal of Yoga, 2018
Despite tremendous advancements in medicine, the number of oral cancer cases continues to increase, and the need for integrating alternate medicine or adopting an integrative approach has become a compelling cost-effective requirement for the management ...
Akshay Anand, Atul Kumar Goyal, Jaimanti Bakshi, Kaushal Sharma, Dharam Vir, Anita Didi   +5 more
doaj   +1 more source