Design a zero energy house in Brisbane, Australia

Due to the increasing energy demand and global warming effects, energy efficient buildings have become increasingly important in the modern construction industry. This research is conducted to evaluate the energy performance, financial feasibility and potential energy savings of zero energy houses. Through the use of building computer simulation technique, a 5 stars energy rated house was modelled and validated by comparing the energy performance of a base case scenario to a typical house in Brisbane. By integrating energy reduction strategies and utilizing onsite renewable energy such as solar energy, zero energy performance is achieved. It is found that approximately 66 % energy savings can be achieved in the household annual energy usage by focusing on maximizing the thermal performance of building envelope, minimizing the energy requirements and incorporating solar energy technologies.

Energy-based motion control of a slender hull unmanned underwater vehicle

This paper presents a motion control system for tracking of attitude and speed of an underactuated slender-hull unmanned underwater vehicle. The feedback control strategy is developed using the Port-Hamiltonian theory. By shaping of the target dynamics (desired dynamic response in closed loop) with particular attention to the target mass matrix, the influence of the unactuated dynamics on the controlled system is suppressed. This results in achievable dynamics independent of stable uncontrolled states. Throughout the design, the insight of the physical phenomena involved is used to propose the desired target dynamics. Integral action is added to the system for robustness and to reject steady disturbances. This is achieved via a change of coordinates that result in input-to-state stable (ISS) target dynamics. As a final step in the design, an anti-windup scheme is implemented to account for limited actuator capacity, namely saturation. The performance of the design is demonstrated through simulation with a high-fidelity model.

Genome-wide association meta-analysis identifies new endometriosis risk loci

We conducted a genome-wide association meta-analysis of 4,604 endometriosis cases and 9,393 controls of Japanese and European ancestry. We show that rs12700667 on chromosome 7p15.2, previously found to associate with disease in Europeans, replicates in Japanese (P = 3.6 x 10(-3)), and we confirm association of rs7521902 at 1p36.12 near WNT4. In addition, we establish an association of rs13394619 in GREB1 at 2p25.1 with endometriosis and identify a newly associated locus at 12q22 near VEZT (rs10859871). Excluding cases of European ancestry of minimal or unknown severity, we identified additional previously unknown loci at 2p14 (rs4141819), 6p22.3 (rs7739264) and 9p21.3 (rs1537377). All seven SNP effects were replicated in an independent cohort and associated at P <5 x 10(-8) in a combined analysis. Finally, we found a significant overlap in polygenic risk for endometriosis between the genome-wide association cohorts of European and Japanese descent (P = 8.8 x 10(-11)), indicating that many weakly associated SNPs represent true endometriosis risk loci and that risk prediction and future targeted disease therapy may be transferred across these populations.

Enterprise education: The frustration of a pure contest

Purpose This paper discusses the development of a strategy game for enterprise education. It is argued that requiring students to initially struggle with the game’s rules and strategies results in a worthwhile test of their persistence and ability to manage ambiguity. Further, that in the absence of uncertainty, students will not benefit from the game’s potential contribution to their overall learning. Approach The paper is constructed around the infusion of student narratives and the author’s self-reflective thoughts. The papers explores the process of developing a game that; - 1) provides the students with access to an enterprise reality, - 2) strengthens their engagement with the theoretical foundations of their studies, and; - 3) provides a process for serious self-reflection. Findings Despite the mixed views presented in this paper, the game’s development thus far has been very successful. Students do enjoy and benefit from enduring the frustration of a pure contest. Having to work through uncertainty is a good practice for students in Higher Education, especially those engaged in enterprise education. Practical Implications Whilst the use of games in experiential education is not uncommon, consideration of how and why they are developed is not always well understood. This paper suggests that enterprise educators have significant opportunities to develop games that genuinely provide student access to the entrepreneur’s way of life. Value of Paper This paper provides evidence of how a game can be constructed to add significant value to an existing curriculum. It also provides evidence of the inner thoughts of students frustrated by a challenge they refuse to give up on. As such, it provides a valuable window through which to contemplate the minds of tomorrow’s nascent entrepreneurs.