We propose that the different angular distributions in two-photon collisions observed at low and high center-of-mass energies Wγγ indicate the transition from nonperturbative to perturbative QCD. We calculate the differential cross sections of γγ → ππ, KK in the angle θ of one of the final-state mesons using QCD sum rules and the perturbative QCD approach based on kT factorization theorem. Our ...

In our paper we investigate the use of qualitative spatial representations (QSR) about relative direction and distance for shape representation. Our new approach has the advantage that we can generate prototypical shapes from our abstract representation in first-order predicate calculus. Using the conceptual neighborhood which is an established concept in QSR we can directly establish a concept...

We propose that the different angular distributions in two-photon collisions observed at low and high center-of-mass energies Wγγ indicate the transition from nonperturbative to perturbative QCD. We calculate the differential cross sections of γγ → ππ, KK in the angle θ of one of the final-state mesons using QCD sum rules and the perturbative QCD approach based on kT factorization theorem. Our ...

Abstract Objectives The objective of this study was to investigate multi-stakeholder perceptions practice-related facilitators optimising the quality Regulated Pharmacy Technician (RPT) integration into community workforce in Ontario. Facilitators incorporating technicians workflow and supporting their optimal scope practice were explored. Methods A qualitative exploratory comprising a series o...

We propose that the different angular distributions in two-photon collisions observed at low and high center-of-mass energies Wγγ indicate the transition from nonperturbative to perturbative QCD. We calculate the differential cross sections of γγ → ππ, KK in the angle θ of one of the final-state mesons using QCD sum rules and the perturbative QCD approach based on kT factorization theorem. Our ...

BACKGROUND Current knowledge on the relationship between the physical environment and walking for transportation among older adults (≥ 65 years) is limited. Qualitative research can provide valuable information and inform further research. However, qualitative studies are scarce and fail to include neighborhood outings necessary to study participants' experiences and perceptions while interacti...

A diet high in fruits and vegetables (F&V) has been associated with a decreased risk of certain cancers, reduced morbidity and mortality from heart disease, and enhanced weight management. Yet to date, most of the US population does not consume the recommended amount of F&V despite numerous interventions and government guidelines to promote consumption. Research has found various impediments to...

BACKGROUND Aboriginal Australians have a lower rate of utilisation of palliative care services than the general population. This study aimed to explore care providers' experiences and concerns in providing palliative care for Aboriginal people, and to identify opportunities for overcoming gaps in understanding between them and their Aboriginal patients and families. METHODS In-depth, qualitat...

Evidence from Ghana consistently shows that unmet need for contraception is pervasive with many possible causes, yet how these may differ by cultural zone remains poorly understood. This qualitative study was designed to elicit information on the nature and form of misconceptions associated with contraceptive use among northern and southern Ghanaians. Twenty-two focus group discussions (FGDs) w...

INTRODUCTION Vaccine acceptance is a critical component of sustainable immunization programs, yet rates of vaccine hesitancy are rising. Increased access to misinformation through media and anti-vaccine advocacy is an important contributor to hesitancy in the United States and other high-income nations with robust immunization programs. Little is known about the content and effect of informatio...