The Al-Marsad (observatory) contract holds significant importance as a means for developing and investing in urban Waqf (endowment) lands. It serves as an exception when the endowment lacks the resources to independently develop the land. Under this right, private capital can be utilized, with the proceeds from construction benefiting the Waqf. The observatory owner can recover their construction expenses along with profits. Importantly, the investment value remains a debt secured by the Waqf. Unlike direct ownership, the observatory right is not (...) a real property right stemming from Waqf ownership. Instead, it is a unique personal right that allows the owner to exploit the building, transfer it to others, and pass it on to heirs within the bounds of creditor rights. Although it intersects with provisions related to newly established exploitation contracts, its distinct nature makes it an effective method for developing and investing in Waqf properties, necessitating legislative regulation. (shrink)

Neospora caninum infection, one of the major causes of abortions in dairy cattle, has brought a huge loss to farmers worldwide. In this study, we develop a six-compartment susceptible-infected model of N. caninum transmission which is later reduced to a two-equation system. Potential controls including medication, test-and-cull, and vaccination are proposed and analyzed, and the corresponding reproduction numbers are derived. The conditions for the global stabilities of disease-free and endemic equilibria are investigated with analytical solutions and geometric approach. Furthermore, uncertainty (...) and sensitivity analysis shows that three control strategies are effective towards the varied environment, whereas the effectiveness of each measure highly depends on parameters related to control actions. Dynamics of reproduction numbers illustrate that disease elimination can be achieved by three types of controls: adopting medication with medicine efficacy higher than 0.4 to prevent vertical transmission, implementing test-and-cull with culling coverage larger than 0.3, and taking vaccine with coverage larger than 0.1. Numerical results suggest that preventive measures should at least include the prevention of access of other hosts, such as dogs, to cattle; otherwise, these control measures will lose effectiveness. Our presented study provides guidance for decision-making on N. caninum infected farm management. (shrink)