Non-users of contraception differ greatly in their likely motivation to adopt a method or resume use. This study presents a new approach to defining high and low motivation groups by stated intention to use, past use, and unmet need, to determine how these groups differ in characteristics and in region of residence. Data come from 23 DHS surveys in sub-Saharan countries, with representation from the eastern/southern region and western/central region. The low motivation non-users, with less past use and less intention to use in the future, are more rural, less educated, and closer to poverty. Motivational intensity is lower in the western/central region, which contains far fewer intenders than the eastern/southern region and where many more report no past use and no unmet need. When used to guide planning, unmet need should be augmented with motivation, since the two classifications do not entirely overlap. Between 10 and 17% of current non-users of family planning are likely highly motivated to use, but are not captured in the unmet need classification. Program implications for these non-using groups are discussed.
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Waste Manag
December 2024
College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China.
To alleviate the energy crisis and control environmental pollution raised by spent lithium-ion batteries (LIBs), the development of efficient and economic methods for their recycling is crucial for sustainable development of new energy industry. Herein, a combined pyro - hydrometallurgical process was adopted for recovery of valuable metal elements for spent LiNiCoMnO (NCM523). Different from conventional pyrometallurgical methods with high temperature and energy consumption, the NHHSO roasting strategy works at 400 °C and achieves remarkable leaching efficiencies of Li, Co, Mn, and Ni achieved 97.
View Article and Find Full Text PDFCollaborative organising is known to burn like a rocket: it thrives on intense passion, relationality and creativity but quickly falls into pieces. This article explores the underestimated role of events and their affective atmospheres to sustain collaborative work. Drawing insights from two ethnographic field studies within an open-source software community and a network of impact entrepreneurs, we introduce the notion of 'polyrhythmic affectivity' at the core of polycentric governance.
View Article and Find Full Text PDFJ Matern Fetal Neonatal Med
December 2025
Clinical Nursing Teaching and Research Section, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China.
Background: Excessive Gestational Weight Gain is a global public health problem with serious and long-term effects on maternal and offspring health. Early identification of at-risk groups and interventions is crucial for controlling weight gain and reducing the prevalence of excessive gestational weight gain. Currently, tools for predicting the risk of excessive gestational weight gain are lacking in China.
View Article and Find Full Text PDFJ Environ Manage
December 2024
Department of Civil Engineering, Indian Institute of Technology Indore, Simrol, Indore, 453552, Madhya Pradesh, India. Electronic address:
Extreme air pollution poses global health and environmental threats, necessitating robust policy interventions. This study first analyses the surface mass concentration of major aerosols (such as black carbon, organic carbon, dust, sea salts, and sulphates) to estimate global PM concentrations from 1980 to 2023. The developed model-estimated PM database was validated against data from 526 cities worldwide, showing strong accuracy, with RMSE, r, and R values of 7.
View Article and Find Full Text PDFJ Chem Theory Comput
December 2024
Max Planck Institute for the Structure and Dynamics of Matter, Luruper Ch 149, Hamburg 22761, Germany.
High-harmonic generation (HHG) is a nonlinear process in which a material sample is irradiated by intense laser pulses, causing the emission of high harmonics of incident light. HHG has historically been explained by theories employing a classical electromagnetic field, successfully capturing its spectral and temporal characteristics. However, recent research indicates that quantum-optical effects naturally exist or can be artificially induced in HHG, such as entanglement between emitted harmonics.
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