Hmis

Today most of the countries facing many environmental problems out of which water pollution are extremely hazards and world's most of the countries facing enormous challenges to solve this. Water pollution due to Heavy Metal Ions (HMIs) is a global issue which requires proper attention to maintain the water quality demands. A portable system made of MEMS sensors capable of detecting multiple analytes simultaneously is highly demanded. The HMI detection in vapour phase can be a solution for laboratory based detection, but for the field instrument using MEMS the temperature cannot be raised beyond certain limit. Hence, the microfluidic detection is the only option which required high sensitivity. Accordingly, our main objective is to develop a microfluidic platform that can be used for sensing HMIs using a capacitive microcantilever beam fabricated by using MEMS technology. The proposed system is divided into two parts; the first one includes microfluidic chamber or tub and polydimethylsiloxane (PDMS) based microfluidic channel for handling water and second one uses the array of microcantilever beams surface modified with different protein for selective detection of HMIs. In this work, we try to investigate the cantilever based capacitive sensor for different pressure due to HMIs and sensitivity enhancement. Sensitivity optimization is very much essential and it is improved by using different shape, stress concentration region (SCR) and changing the dimension of microcantilever for HMI detection in water environment. It is found that in case of rectangular beam with SCR improves deflection up to 33% and in case of triangular beam this improvement is up to 73%.

Abstract Today most of the countries facing many environmental problems out of which water pollution are extremely hazards and world’s most of the countries facing enormous challenges to solve this. Water pollution due to Heavy Metal Ions (HMIs) is a global issue which requires proper attention to maintain the water quality demands. A portable system made of MEMS sensors capable of detecting multiple analytes simultaneously is highly demanded. The HMI detection in vapour phase can be a solution for laboratory based detection, but for the field instrument using MEMS the temperature cannot be raised beyond certain limit. Hence, the microfluidic detection is the only option which required high sensitivity. Accordingly, our main objective is to develop a microfluidic platform that can be used for sensing HMIs using a capacitive microcantilever beam fabricated by using MEMS technology. The proposed system is divided into two parts; the first one includes microfluidic chamber or tub and polydimethylsiloxane (PDMS) based microfluidic channel for handling water and second one uses the array of microcantilever beams surface modified with different protein for selective detection of HMIs. In this work, we try to investigate the cantilever based capacitive sensor for different pressure due to HMIs and sensitivity enhancement. Sensitivity optimization is very much essential and it is improved by using different shape, stress concentration region (SCR) and changing the dimension of microcantilever for HMI detection in water environment. It is found that in case of rectangular beam with SCR improves deflection up to 33% and in case of triangular beam this improvement is up to 73%.

The Health Information Systems Programme (HISP) is a sustainable and scalable research project enabling and supporting health information systems implementation in more than 100 developing countries. In this paper, we present the historical roots, the status, and discuss the future of HISP and its software (DHIS2). We also reflect on factors contributing to the project’s global success and find the open and participatory approaches to HISP and DHIS2 software development, and implementation in countries as key. For the future, we discuss strategies to stabilise as well as grow the HISP and DHIS2 community into a sustainable ecosystem.