Bull World Health Organ
December 2024
Achieving the sexual health components of sexual and reproductive health and rights as outlined in the sustainable development goals (SDGs) is integral to overall physical and mental well-being and a core part of universal health coverage. However, tracking national and global progress towards advancing the sexual health and rights of people is challenging because of the paucity of indicators to examine many of its components. To assess the state of sexual health in populations, determine service provision needs, evaluate the effectiveness of health system interventions and monitor progress in optimizing health, a comprehensive set of indicators is needed to cover every component of sexual health.
View Article and Find Full Text PDFPoly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) remains the most investigated conjugated polymer in bioelectronics, due to its biocompatibility, high conductivity, and commercial availability. Despite these advantages, it suffers from structural and electronic instability, associated with the PSS component. Here, a graft copolymer based on ionised sulfonic modified PEDOT, poly(EDOTS--EDOT), was electrochemically synthesised with demonstrated structural and electronic stability and enhanced electrochemical performance.
View Article and Find Full Text PDFRecent advances in active materials and fabrication techniques have enabled the production of cyclically self-deployable metamaterials with an expanded functionality space. However, designing metamaterials that possess continuously tunable mechanical properties after self-deployment remains a challenge, notwithstanding its importance. Inspired by push puppets, we introduce an efficient design strategy to create reversibly self-deployable metamaterials with continuously tunable post-deployment stiffness and damping.
View Article and Find Full Text PDFLooking at SRHR as an isolated set of elements, as is the current practice, does not do justice to the needs and rights of people and communities and may be one of the reasons why challenges remain in the attainment of SRHR for all. SRHR Infographic snapshots were developed for all 194 WHO Member States and included 120 indicators covering a broad range of policy, health systems and service delivery interventions. The snapshots were created using data less than 10 years old publicly available in data repositories maintained by international and global agencies.
View Article and Find Full Text PDFThe longevity of current joint replacements is limited by aseptic loosening, which is the primary cause of non-infectious failure for hip, knee, and ankle arthroplasty. Aseptic loosening is typically caused either by osteolysis from particulate wear, or by high shear stresses at the bone-implant interface from over-constraint. Our objective was to demonstrate feasibility of a compliant intramedullary stem that eliminates over-constraint without generating particulate wear.
View Article and Find Full Text PDFThe human right to health is universal and non-exclusionary, supporting health in full, and for all. Despite advances in health systems globally, 3.6 billion people lack access to essential health services.
View Article and Find Full Text PDFAside from some living tissues, few materials can autonomously learn to exhibit desired behaviors as a consequence of prolonged exposure to unanticipated ambient loading scenarios. Still fewer materials can continue to exhibit previously learned behaviors in the midst of changing conditions (e.g.
View Article and Find Full Text PDFThe high burden of HIV in sub-Saharan Africa places significant demands on health care services. Interventions such as HIV self-testing, and pre- and post-exposure prophylaxis (PrEP and PEP) could empower individuals to determine their HIV status and prevent HIV acquisition. In 2018, the World Health Organization disseminated an online, anonymous, global values and preferences survey to adults 18 years of age and older.
View Article and Find Full Text PDFand examine the barriers to self-care for people experiencing homelessness and how to overcome them
View Article and Find Full Text PDFMechanical metamaterials have been designed to achieve custom Poisson's ratios via the deformation of their microarchitecture. These designs, however, have yet to achieve the capability of exhibiting Poisson's ratios that alternate by design both temporally and spatially according to deformation. This capability would enable dynamic shape-morphing applications including smart materials that process mechanical information according to multiple time-ordered output signals without requiring active control or power.
View Article and Find Full Text PDFHomelessness is a global issue that is often associated with substance use. Research on this relationship in low- to middle-income countries (LMIC) is limited. We aimed to explore which factors are associated with substance use through secondary data analysis of a sample of 472 adults who attended services for homeless individuals in Cape Town, South Africa.
View Article and Find Full Text PDFBackground: Self-care interventions are influencing people's access to, expectation and understanding of healthcare beyond formal health delivery systems. In doing so, self-care interventions could potentially improve health-seeking behaviours. While many men proactively engage in maintaining and promoting their health, the focus on men's health comes from the recognition, at least partially, that male socialization and social norms can induce men and boys to have a lower engagement in institutionalized public health entities and systems around their sexual and reproductive health and rights, that could impact negatively on themselves, their partners and children.
View Article and Find Full Text PDFIn this work, we demonstrate the high-throughput fabrication of 3D microparticles using a scanning two-photon continuous flow lithography (STP-CFL) technique in which microparticles are shaped by scanning the laser beam at the interface of laminar co-flows. The results demonstrate the ability of STP-CFL to manufacture high-resolution complex geometries of cell carriers that possess distinct regions with different functionalities. A new approach is presented for printing out-of-plane features on the microparticles.
View Article and Find Full Text PDFIn this work, a scalable automated approach for fabricating 3D microgranular crystals consisting of desired arrangements of microspheres using holographic optical tweezers and two-photon polymerization is introduced. The ability to position microspheres as desired within lattices of any configuration allows designers to engineer the behavior of new metamaterials that enable advanced applications (e.g.
View Article and Find Full Text PDFBackground And Aims: The management of persistent type II endoleaks (T2E) is often problematic for the endovascular specialist, with a lack of clear evidence for the best approach for embolization. The aim of this study was to evaluate the safety and efficacy of translumbar embolization (TLE) for T2E following endovascular aneurysm repair (EVAR).
Methods: This retrospective review included 27 embolizations performed on 23 patients with a median age of 78 (range 67-94 years; male: female 15:9), during the period September 2006 to July 2018.
Front Bioeng Biotechnol
September 2019
Organic semiconductors remain of major interest in the field of bioelectrochemistry for their versatility in chemical and electrochemical behavior. These materials have been tailored using organic synthesis for use in cell stimulation, sustainable energy production, and in biosensors. Recent progress in the field of fully organic semiconductor biosensors is outlined in this review, with a particular emphasis on the synthetic tailoring of these semiconductors for their intended application.
View Article and Find Full Text PDFVasc Endovascular Surg
January 2020
Background: Abdominal aortic aneurysm (AAA) repair in patients with organ transplant remains a challenge. We looked at AAA repair in patients with organ transplants at our tertiary liver and kidney transplant unit.
Methods: A retrospective analysis of a prospectively maintained database was undertaken from January 2008 to July 2018.
Early examples of computers were almost exclusively based on mechanical devices. Although electronic computers became dominant in the past 60 years, recent advancements in three-dimensional micro-additive manufacturing technology provide new fabrication techniques for complex microstructures which have rekindled research interest in mechanical computations. Here we propose a new digital mechanical computation approach based on additively-manufacturable micro-mechanical logic gates.
View Article and Find Full Text PDFDesigning mechanical metamaterials is overwhelming for most computational approaches because of the staggering number and complexity of flexible elements that constitute their architecture-particularly if these elements don't repeat in periodic patterns or collectively occupy irregular bulk shapes. We introduce an approach, inspired by the freedom and constraint topologies (FACT) methodology, that leverages simplified assumptions to enable the design of such materials with ~6 orders of magnitude greater computational efficiency than other approaches (e.g.
View Article and Find Full Text PDFArchitected materials can achieve impressive shape-changing capabilities according to how their microarchitecture is engineered. Here we introduce an approach for dramatically advancing such capabilities by utilizing wrapped flexure straps to guide the rolling motions of tightly packed micro-cams that constitute the material's microarchitecture. This approach enables high shape-morphing versatility and extreme ranges of deformation without accruing appreciable increases in strain energy or internal stress.
View Article and Find Full Text PDFWe report a new framework for a quantitative understanding of optical trapping (OT) particle handling dynamics. We present a novel three-dimensional particle-based model that includes optical, hydrodynamic, and inter-particle forces. This semi-empirical colloid model is based on an open-source simulation code known as LAMMPS (large-scale atomic/molecular massively parallel simulator) and properly recapitulates the full OT force profile beyond the typical linear approximations valid near the trap center.
View Article and Find Full Text PDFThe purpose of this work is to introduce three improvements to automated holographic-optical-tweezers systems that increase the number and speed of particles that can be manipulated simultaneously. First, we address path planning by solving a bottleneck assignment problem, which can reduce total move time by up to 30% when compared with traditional assignment problem solutions. Next, we demonstrate a new strategy to identify and remove undesired (e.
View Article and Find Full Text PDFDemand continues to rise for custom-fabricated and engineered colloidal microparticles across a breadth of application areas. This paper demonstrates an improvement in the fabrication rate of high-resolution 3D colloidal particles by using two-photon scanning lithography within a microfluidic channel. To accomplish this, we present (1) an experimental setup that supports fast, 3D scanning by synchronizing a galvanometer, piezoelectric stage, and an acousto-optic switch, and (2) a new technique for modifying the laser's scan path to compensate for the relative motion of the rapidly-flowing photopolymer medium.
View Article and Find Full Text PDFVasc Endovascular Surg
February 2018
Purpose: Previous reports have suggested higher periprocedural complications after ipsilateral antegrade femoral arterial access (AA). We looked at a contemporary series comparing complication rates between AA and contralateral retrograde femoral arterial access (RA) for femoropopliteal angioplasty.
Method: A prospective review of all cases between 2010 and 2015 in a United Kingdom tertiary vascular center.