by Abdullah Abbas Kendoush

Received: 04 October 2021;  Published: 07 December 2021;  doi: 10.21926/jept.2104048

By the adoption of a drag-buoyancy equality model, analytical solutions were obtained for the drag coefficients (CD) of Taylor bubbles rising steadily in pipes. The obtained solutions were functions of the geometry of the Taylor bubble and the gas volume fraction. The solutions were applicable at a wide range of Capillary numbers. The solution was validated by comparison with experimental data of other investigators. All derived drag formulas were subject to the condition that Bond number >4, for air-water syste [...]

by Panagiotis Kyriakopoulos  , Athanassios Giannopoulos  , Yannis G. Caouris  , Manolis Souliotis  and Mattheos Santamouris

Received: 04 September 2021;  Published: 06 December 2021;  doi: 10.21926/aeer.2104032

The hourly ambient air temperature information was analyzed for two Greek coastal Mediterranean cities: Patras (for the entire 2018 year) with ten urban and one rural stations, and Kalamata (for the entire 2019 and 2020 years) with eight urban and two rural stations. The heating and cooling Degree Hours (DH) and Degree Days (DD) were calculated, for base temperatures of 18 °C and 26 °C, respectively. The urban heating degree hours for the cities of Patras and Kalamata were observed to be 19.2% and 24%, respectively [...]

by Emily Beitzell  , Purnaja Podduturi  , Megan Hook  , Amelia Jones  , Haley McKeen  and Miriam Liss

Received: 03 October 2021;  Published: 01 December 2021;  doi: 10.21926/obm.icm.2104053

The coronavirus (COVID-19) pandemic has produced a global mental health crisis and many individuals have obsessive thoughts and worry about COVID-19 which may, both directly and indirectly, relate to more general anxiety. This study explored anxiety sensitivity and mindful awareness as mediators in the relationship between COVID-19 obsession and general anxiety. College student participants (N = 172) completed the Obsession with COVID-19 scale, the Anxiety Sensitivity Index, the awareness subscale of the Five Facto [...]

by Ludmila Velichkina  , Yakov Barbashin  and Alexander Vosmerikov

Received: 10 October 2021;  Published: 01 December 2021;  doi: 10.21926/cr.2104004

The objective of this research was to analyze the effect of different concentrations of nitric and hydrochloric acids on the structural, acidic, and catalytic properties of a post-synthetic treated ZSM-5 type zeolite at various temperatures. The properties of zeolite catalysts were determined using different methods, such as the Brunauer-Emmett-Teller (BET) method for specific surface area, temperature-programmed desorption (TPD) of ammonia method for acidic properties, and a flow-through unit with fixed bed cataly [...]

by June An  and Young Nam Chun

Received: 30 October 2021;  Published: 01 December 2021;  doi: 10.21926/aeer.2104031

Renewable energies such as solar or wind energy are highly unreliable, owing to uncertain energy intensity and discontinuity. This shortcoming could be overcome by converting renewable energies to a form such as chemical fuel storage. In the present study, we created an energy conversion system that uses microwave heating and a carbon receptor to transform CO2, a greenhouse gas, into CO chemical fuel. The parametric investigation found that increasing the gasification temperature and feed gas temperature decreased [...]

by Omar Alelweet  , Sara Pavia  and Zehao Lei

Received: 28 September 2021;  Published: 29 November 2021;  doi: 10.21926/rpm.2104047

This paper investigates the composition, properties and reactivity of a red mud waste generated in Saudi Arabia with a view to find alternative materials to replace construction binders of high environmental impact. The phase transformation triggered by the sintering of the RM up to 1000°C is determined with thermal and X-Ray Diffraction analyses. Reactivity is investigated with chemical and physical methods including the Chapelle test, setting times, mechanical index and microscopy. The RM is clearly pozzol [...]

by Carol Tran  and Laurence J. Walsh

Received: 28 September 2021;  Published: 26 November 2021;  doi: 10.21926/rpm.2104046

Subsurface remineralization can be promoted by the topical application of nanoparticles of casein phosphopeptide-amorphous calcium phosphate (CPP-ACP). To assess changes in enamel white spot lesions, an in situ proof-of-concept investigation was performed using 5 subjects (all of whom were healthy young adults) with a cross-over study design. Custom orthodontic brackets were attached to the buccal surfaces of the maxillary second premolar and first molar teeth. Each bracket had a recess that held a slab of enamel w [...]

by Karolina Bryl  and Jacelyn Biondo

Received: 25 August 2021;  Published: 26 November 2021;  doi: 10.21926/obm.icm.2104052

Dance/movement therapy (DMT) is a strengths-based approach to psychotherapy that uses dance and movement as the primary form of communication, while emphasizing the movement relationship in addition to verbal dialogue. Positive and negative symptomatology of a diagnosis on the schizophrenia spectrum often disrupt organized thinking, orientation to reality, overall functioning, communication, and healthy relationships. Therefore, a body-based psychotherapeutic approach can be a pragmatic way to support, join, and pr [...]

by Cathryn Duchette  , Danilo V Tolusso  , Whitley J Stone  , Maire M Blankenship  and Rachel A Tinius

Received: 23 June 2021;  Published: 25 November 2021;  doi: 10.21926/obm.icm.2104051

Studies have demonstrated that new and expectant mothers experience increased levels of stress and anxiety during the COVID-19 pandemic. Though prenatal yoga is an effective mode of improving mental health during pregnancy, no research has evaluated its effect on mental health during times of extreme stress, such as a global pandemic. The purpose of this study was to determine the influence of a single session and a 10-week prenatal yoga intervention on the mental health of pregnant women during the COVID-19 pandem [...]

by Thomas Frei

Received: 12 October 2021;  Published: 24 November 2021;  doi: 10.21926/aeer.2104030

Climate change has a major impact on nature and influences ecological systems. The increase in the CO2-concentration in the atmosphere is a major driver of global warming. This study showed that global warming has a major impact on the release of pollen, and hence, on the people suffering from allergies in Switzerland. Basel is a station where long-term pollen observation is conducted, and the data was used to investigate the change during the last 52 years. There are stations throughout the world to measure the at [...]