Results 21 to 30 of about 117,140 (175)

Contraception use and effectiveness among women in a trial of the diaphragm for HIV prevention.

, 2011
BACKGROUND: There is little data on contraceptive effectiveness or use patterns from sub-Saharan Africa. STUDY DESIGN: We analyzed data from women at risk of pregnancy (n=4905) in the Methods for Improving Reproductive Health in Africa trial of the ...
Ramjee, Gita, Bostrom, Alan, Grossman, Dan, Dan Grossman, Blanchard, Kelly, Chipato, Tsungai, de Bruyn, Guy, van der Straten, Ariane, Naomi Lince, Padian, Nancy, Kelly Blanchard, Elizabeth Montgomery, Ariane van der Straten, Guy de Bruyn, Tsungai Chipato, Lince, Naomi, Alan Bostrom, Gita Ramjee, Nancy Padian, Montgomery, Elizabeth   +19 more
core   +1 more source

Acoustics of the Vowel - Preliminaries [PDF]

, 2016
It seems as if the fundamentals of how we produce vowels and how they are acoustically represented have been clarified: we phonate and articulate. Using our vocal chords, we produce a vocal sound or noise which is then shaped into a specific vowel sound ...
Maurer, Dieter
core   +1 more source

Computing Room Acoustics Using 3D FDTD: A Cuda Approach. [PDF]

, 2011
In seeking to model realistic room acoustics, direct numerical simulation can be employed. This paper presents 3D Finite Difference Time Domain schemes that incorporate losses at boundaries and due to the viscosity of air.
Stefan Bilbao, Bilbao, Stefan, Craig J. Webb, Webb, C.   +3 more
core   +1 more source

A Molecularly Defined Midbrain Circuit Mechanism for Sound‐Driven Defensive Behavior and Anxiety

Advanced Science, EarlyView.
Schematic diagram showing the Cbln2+ ICx–dPAG circuit for sound‐driven defensive and anxiety‐like behaviors. ABSTRACT The innate defense behaviors in response to threatening sounds play a fundamental role in survival. However, the neural circuits that detect threat‐relevant auditory cues and transform them into defensive behaviors remain poorly defined.
Jie Cao, Xingxing Lai, Lifang Huo, Zhouyuan Zheng, Qian Zhang, Zhimin Ye, Panpan Wan, Chao Ma, Congping Shang   +8 more
wiley   +1 more source

Revisiting paravertebral muscles in European rabbits (Oryctolagus cuniculus) and European brown hares (Lepus europaeus) (Leporidae; Lagomorpha)

The Anatomical Record, EarlyView.
Abstract Domesticated European rabbits (Oryctolagus cuniculus) have long been chosen as laboratory model organisms. Despite this, there has been no definitive study of the vertebral musculature of wild rabbits. Relevant descriptions of well‐studied veterinary model mammals (such as dogs) are generally applicable, but not appropriate for a species ...
Nuttakorn Taewcharoen, Emma Sherratt, Philip Stott, Rachel Norris   +3 more
wiley   +1 more source

Acoustic‐driven surface cleaning with millimeter‐sized bubbles at translational resonance

Droplet, EarlyView.
Time‐lapse visualization comparing bubble trajectories. The top panel (0 Hz) shows a bubble's linear path under no acoustic forcing, while the bottom panel (50 Hz) demonstrates the oscillatory motion induced by acoustic waves at a resonance mode. This mechanism holds promising potential for applications such as surface cleaning.
Yan Jun Lin, Zhengyang Liu, Sunghwan Jung   +2 more
wiley   +1 more source

Water Electrolysis Technologies for Extraterrestrial Water Resource Conversion

EcoEnergy, EarlyView.
This paper reviews four water electrolysis technologies for extraterrestrial water conversion: alkaline water electrolysis, proton exchange membrane water electrolysis, solid oxide water electrolysis, and anion exchange membrane water electrolysis. It elaborates on their mechanisms, components, and integration, highlighting challenges such as water ...
Yawen Jiang, Yuan Zhao, Lin Zu, Lili Ling, Yongwei Zhao, Jun Di, Pin Song   +6 more
wiley   +1 more source

Degrees of disclosure: a study of women's covert use of the diaphragm in an HIV prevention trial in sub-Saharan Africa.

, 2009
In sub-Saharan Africa more women are infected with HIV/AIDS than men and new prevention methods are urgently needed. One major attribute of female-initiated HIV prevention methods is that they can be used covertly, without a male partner's knowledge ...
van der Straten, Ariane, Montgomery, Elizabeth T, Padian, Nancy, Sahin-Hodoglugil, Nuriye Nalan, Kacanek, Deborah, Mtetwa, Sibongile, Morar, Neetha, MIRA Team, Munyoro, Jane, Cheng, Helen   +9 more
core   +1 more source

Modeling and Output Optimization of Triboelectric Microphone for Acoustic Energy Harvesting

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
This work elucidates the fundamental multiphysics coupling mechanisms governing acoustic T‐phone, providing a critical theoretical foundation and a predictive design paradigm for the future engineering and deployment of next‐generation, self‐powered acoustic sensors.
Dan Liu, Jie Zhu, Shilong Wang, Chaobin Jia, Tao Jiang, Guofei Zhou, Jiajia Shao   +6 more
wiley   +1 more source

Monitoring and assessment for obstructive sleep apnea

FlexMat, EarlyView.
This review systematically classifies Obstructive Sleep Apnea (OSA) monitoring indicators into three categories: physical, biochemical, and electrophysiological indicators, and lists several methods for each category. Abstract Obstructive sleep apnea (OSA) is a common chronic sleep‐disordered breathing disease characterized by recurrent upper airway ...
Yaowen Xu, Feifei Lin, Shujiao Chen, Zhen You, Shujing Zhu, Weiwei Zhao, Qiang Zhao   +6 more
wiley   +1 more source