We present far-IR/sub-mm imaging and spectroscopy of 49 Ceti, an unusual circumstellar disk around a nearby young A1V star. The system is famous for showing the dust properties of a debris disk, but the gas properties of a low-mass protoplanetary disk. The data were acquired with the Herschel Space Observatory PACS and SPIRE instruments, largely as part of the “Gas in Protoplanetary Systems” (G...

The A star 49 Ceti, at a distance of 61 pc, is unusual in retaining a substantial quantity of molecular gas while exhibiting dust properties similar to those of a debris disk. We present resolved observations of the disk around 49 Ceti from the Submillimeter Array in the J=2-1 rotational transition of CO with a resolution of 1.0×1.2 arcsec. The observed emission reveals an extended rotating str...

Given that performance-based approaches secure maximum energy consumption for new buildings in more and building codes standards, such could ensure ventilation is designed to avoid risks occupants’ health. We have developed a approach assessing indoor air quality (IAQ) performance low-energy houses at the design stage of building, line with regulatory calculations. In this context, whole-buildi...

This paper calculates the CO2 emissions for port-hinterland container transport system and proposes possible emission reduction measures. considers Dhaka–Chittagong in Bangladesh. The represents 70% of total international maritime containerised trade, including more than 2.0 million twenty-foot equivalent units (TEUs) per year. By implementing different scenarios using a simulation approach, th...

This paper is the first part of a two-part study that aims to retrieve aerosol particle size distribution (PSD) and refractive index from the multispectral and multiangular polarimetric measurements taken by the new-generation Sun photometer as part of the Aerosol Robotic Network (AERONET). It provides theoretical analysis and guidance to the companion study in which we have developed an invers...

Current efforts by the International Maritime Organization (IMO) to decarbonize shipping sector have gained momentum, although exact path achieve this goal is currently unclear. However, it can be safely assumed that alternative cleaner and zero-carbon fuels will key components in strategy. In work, three ship emission scenarios for 2025, 2040, 2050 were developed cover area of North Baltic Sea...