Validated model and study of a rammed earth wall building

A 2100 m² (GFA) two-storey rammed earth building was built on the Thurgoona campus of Charles Sturt University in 1999. The building is novel both in the use of materials and equipment for heating and cooling. The climate at Wodonga can be characterised as hot and dry, so the challenge of providing comfortable working conditions with minimal energy consumption is considerable. This paper describes a thermal model of one of the second-storey offices on the west-end of the building. The simulation software, TRNSYS, has been used to predict office temperatures and comparisons are made between these and measurements made over a typical week in summer. Reasonable agreement has been achieved under most conditions. The model has been used to investigate key building parameters and strategies, including night flushing, to improve the thermal comfort in the office.

Implementation of enterprise resource planning (ERP) software in a major construction contracting organization in Hong Kong

Purpose – The purpose of this paper is to summarize the scope, methodology and main findings of a doctoral thesis about the implementation of enterprise resource planning (ERP) software in a major construction contracting organization in Hong Kong. This research is taken from a leadership and power and project management (PM) perspective.

Design/methodology/approach – The project adopted a case study approach in which the candidate was an employee/observer, who was embedded as a member of the business transformation team taking an action learning approach to study the ERP adoption. The research used the soft system methodology to identify gaps in the observed maturity level which exists in the organization. Data was gathered using public and private documentation, semi-structured interviews, observation and was validated through review of evidence with participants.

Findings – The results identified the importance of leadership and cultural issues in implementation of the business strategy. This research includes a contribution in two spheres: PM and construction procurement. The first implication for PM theory was to illustrate how knowledge has been efficiently managed within a construction organization by using information communication technology (ICT). It can be represented by the ladder of ICT>ERP>KM>PM. The second implication was to pave the way for the use of partnering strategies in PM practice. It can be represented by the ladder of National Culture>Organizational Culture>Leadership>Partnering Strategy>PM.

Practical implications – This model could be adapted to other large and complex organisational contexts. The research project also has implications as opening up a PM perspective on business transformation.

Originality/value – The contribution of this research is proving the success of adopting KM in a construction company by using an ERP system. The importance of culture in the traditionally collectivistic construction industry, and the issues senior management should take into account when formulating business strategies.

High-intensity interval training for improving health-related fitness in adolescents: a systematic review and meta-analysis

BACKGROUND: High-intensity interval training (HIIT) may be a feasible and efficacious strategy for improving health-related fitness in young people. The objective of this systematic review and meta-analysis was to evaluate the utility of HIIT to improve health-related fitness in adolescents and to identify potential moderators of training effects. METHODS: Studies were considered eligible if they: (1) examined adolescents (13-18 years); (2) examined health-related fitness outcomes; (3) involved an intervention of ≥4 weeks in duration; (4) included a control or moderate intensity comparison group; and (5) prescribed high-intensity activity for the HIIT condition. Meta-analyses were conducted to determine the effect of HIIT on health-related fitness components using Comprehensive Meta-analysis software and potential moderators were explored (ie, study duration, risk of bias and type of comparison group). RESULTS: The effects of HIIT on cardiorespiratory fitness and body composition were large, and medium, respectively. Study duration was a moderator for the effect of HIIT on body fat percentage. Intervention effects for waist circumference and muscular fitness were not statistically significant. CONCLUSIONS: HIIT is a feasible and time-efficient approach for improving cardiorespiratory fitness and body composition in adolescent populations.

Performance analysis of software-defined network switch using M/Geo/1 model

The aim of this letter is to propose an analytical model to study the performance of Software-Defined Network (SDN) switches. Here, SDN switch performance is defined as the time that an SDN switch needs to process packet without the interaction of controller. We exploit the capabilities of queueing theory based M/Geo/1 model to analyze the key factors, flowtable size, packet arrival rate, number of rules, and position of rules. The analytical model is validated using extensive simulations. Our study reveals that these factors have significant influence on the performance of an SDN switch.