Optimal design of gas adsorption refrigerators for cryogenic cooling

The design of gas adsorption refrigerators used for cryogenic cooling in the temperature range of 4K to 120K was examined. The functional relationships among the power requirement for the refrigerator, the system mass, the cycle time and the operating conditions were derived. It was found that the precool temperature, the temperature dependent heat capacities and thermal conductivities, and pressure and temperature variations in the compressors have important impacts on the cooling performance. Optimal designs based on a minimum power criterion were performed for four different gas adsorption refrigerators and a multistage system. It is concluded that the estimates of the power required and the system mass are within manageable limits in various spacecraft environments

Instability of three dimensional conformally dressed black hole

The three dimensional black hole solution of Einstein equations with negative cosmological constant coupled to a conformal scalar field is proved to be unstable against linear circularly symmetric perturbations.Comment: 5 pages, REVTe

Workfare in the undemocratic states: the case of China

This article examines the problems caused by workfare in China. It is found that China’s public assistance scheme is managed mainly by volunteers and government officials who do not necessarily possess relevant qualifications. Also, welfare claimants’ benefits can be ceased without going through a rigorous procedure; they can hardly challenge the decisions of the authority because China’s judicial system is interfered by central and local senior officials. This article concludes that workfare is a product of Western democratic countries; its implementation in undemocratic states will only increase power abuses among welfare bureaucrats and threaten the rights of claimants. </jats:p

Construction of a cosmic ray air shower telescope

The telescope under construction is mainly for the purpose of locating the arrival directions of energetic particles and quanta which generate air showers of sizes 10 to the 5th power to 10 to the 6th power. Both fast timing method and visual track method are incorporated in determining the arrival directions. The telescope is composed of four stations using scintillators and neon flash tubes as detectors. The system directional resolution is better than 1.5 deg

The ER-2 meteorological measurement system

The objectives of ER-2 Meteorological Measurement System (MMS) are: (1) to measure the meteorological parameters (pressure, temperature, and the three dimensional wind vector) accurately; (2) to provide high resolution data on atmospheric state variables and aircraft flight track to ER-2 investigators on a timely basis; and (3) to conduct collaborative research in atmospheric dynamics and chemistry. A summary of progress and results are presented

Thematic Analysis: Exploring Practitioners' Perspectives of Delivering Animal Assisted Therapy

Animal Assisted Therapy (AAT) is a psychotherapeutic approach that uses animals in a therapeutic capacity and can be used as an adjunct with a range of practices such as different psychotherapeutic modalities. Despite its relatively long history, more robust research is needed to increase AAT’s evidence-base. There is a relative lack of research in AAT practice from a practitioners’ perspectives. The aim of this qualitative study was to explore how practitioners use AAT in their clinical practice. Ten participants were interviewed about their experiences of using AAT in their clinical practice. Thematic analysis was used to analyse the data. Three main themes emerged from the analysis: The Psychotherapeutic Encounter, Multi-Faceted Relational Process, and Challenges and Opportunities in AAT. The findings revealed that practitioners who used AAT utilised features of the therapy animal, with elements of nature and incorporated it into working in the moment. In addition, the findings revealed the relational dynamics between the client-animal, practitioner-animal, and that AAT is more than a dual therapeutic relationship. The findings also revealed the challenges and opportunities of using AAT within psychotherapy. The study has implications in the areas of better understanding and enhancing the therapeutic relationship in AAT, integrating AAT into counselling psychology practice and identifying potential areas for future research