We propose an adaptive reversible data hiding method with superior visual quality and capacity in which an adaptive generalized difference expansion (AGDE) method is applied to an integer-to-integer subband transform (I2I-ST). I2I-ST performs the reversible subband transform and the AGDE method is a state-of-the-art method of reversible data hiding. The results of experiments we performed objec...

BACKGROUND AND OBJECTIVES: The Bangladesh government declared a general holiday beginning on March 26, 2020 aimed to combat coronavirus (COVID-19) pandemic. The aim of this study was to assess the impacts of the general holiday on air quality in Dhaka city area of Bangladesh. METHODS: Hourly PM2.5 (aer...

This study defined a wealth index that was strongly correlated with a health indicator: the survival of children aged less than five years. This index allowed the most vulnerable social groups for health outcomes to be identified. These groups could become the target for focused interventions and in particular for health-insurance schemes. The study was based on a thorough analysis of data coll...

Abstract The long-term behavior of mass concentration ambient ultrafine particulate matter was discussed on samples collected at a site located in Phnom Penh City, Cambodia, between 2011-2020. A cascade air sampler that can collect PM 0.1 (<0.1 μm) has been used roof floor 5-story building the campus Institute Technology Cambodia (ITC) near central part City. main goal to investigate and car...

Abstract Biochar application into soil has potential as a means for reducing greenhouse gas emissions and climate mitigation strategy. In this study, we evaluated the impact of two doses biochar (10 20 t.ha −1 ) applied in 2014, combined with three fertilization levels (N0, N1, N2) on carbon dioxide (CO 2 field conditions during growing season (April – October) 2018. The site is located Nitra r...

The problem of accurate determination of the position, orientation and width of involute spur gear teeth using a single front-lit image is addressed. The information is used to compute global measures of tooth concentricity and pitch variations across a gear wheel. The approach is based on the use of specialised filters which make maximum use of the grey level information available in the image...