Linkage measures of the construction sector using the hypothetical extraction method

The hypothetical extraction method (HEM) is used to extract a sector hypothetically from an economic system and examine the influence of this extraction on other sectors in the economy. Linkage measures based on the HEM become increasingly prominent. However, little construction linkage research applies the HEM. Using the recently published Organisation for Economic Co-operation and Development input-output database at constant prices, this research applies the HEM to the construction sector in order to explore the role of this sector in national economies and the quantitative interdependence between the construction sector and the remaining sectors. The output differences before and after the hypothetical extraction reflect the linkages of the construction sector. Empirical results show a declining trend of the total, backward and forward linkages, which confirms the decreasing role of the construction sector with economic maturity over the examined period from a new angle. Analytical results reveal that the unique nature of the construction sector and multifold external factors are the main reasons for the linkage difference between countries. Moreover, hypothesis-testing results consider statistically that the extraction structures employed in this research are appropriate to analyse the linkages of the construction sector.

Extending construction linkage measures by the consideration of the impact of capital

Construction linkage is a well-established research field. However, a significant limitation in previous linkage research is that the flow of capital goods is not addressed. Using the OECD input-output tables, this research first generates a new input-output model considering capital as an intermediate factor. Using the new model, the construction linkages are recalculated and investigated in order to evaluate further the role of construction in national economies. The findings verify that traditional construction linkages were extremely underestimated in previous research. Furthermore, the effect of capital on construction shows a declining trend over the examined period. After considering the effect of capital, most values and rankings of backward and forward linkages show a decreasing trend, which confirms the declining role of the construction sector with economic maturity.

Thai hedging practices post-Asian financial crisis

This paper provides survey evidence captured from a sample of 113 respondents to a 2008 questionnaire sent to 344 companies in Thailand. The study examines Thai hedging practices following the Asian Financial Crisis of 1997. Thai companies, like their international counterparts, rely predominantly on matching and forward contracts to hedge transaction exposure. Thai companies, however, appear to be less rigorous when it comes to internal control and supervision of derivative activity. It is recommended that Thai companies improve their risk management practices by putting into place a documented hedging policy, which includes a requirement that senior staff be actively engaged in the risk management activities of the firm.

Secure RFID tag ownership transfer based on quadratic residues

In this paper, we propose a novel approach to secure ownership transfer in RFID systems based on the quadratic residue property. We present two secure ownership transfer schemes-the closed loop and open loop schemes. An important property of our schemes is that ownership transfer is guaranteed to be atomic. Further, both our schemes are suited to the computational constraints of EPC Class-1 Gen-2 passive RFID tags as they only use operations that such passive RFID tags are capable of. We provide a detailed security analysis to show that our schemes achieve strong privacy and satisfy the required security properties of tag anonymity, tag location privacy, forward secrecy, and forward untraceability. We also show that the schemes are resistant to replay (both passive and algebraic), desynchronization, and server impersonation attacks. Performance comparisons demonstrate that our schemes are practical and can be implemented on low-cost passive RFID tags.

Kinematics analysis of 6-DOF parallel micro-manipulators with offset U-Joints : a case study

This paper analyses the kinematics of a special 6-DOF parallel micro-manipulator with offset RR-joint configuration. Kinematics equations are derived and numerical methodologies to solve the inverse and forward kinematics are presented. The inverse and forward kinematics of such robots compared with those of 6-UCU parallel robots are more complicated due to the existence of offsets between joints of RR-pairs. The characteristics of RR-pairs used in this manipulator are investigated and kinematics constraints of these offset U-joints are mathematically explained in order to find the best initial guesses for the numerical solution. Both inverse and forward kinematics of the case study 6-DOF parallel micro-manipulator are modelled and computational analyses are performed to numerically verify accuracy and effectiveness of the proposed methodologies.

Kinematics analysis of 6-DOF parallel micro-manipulators with offset u-joints : a case study

This paper analyses the kinematics of a special 6-DOF parallel micro-manipulator with offset RR-joint configuration. Kinematics equations are derived and numerical methodologies to solve the inverse and forward kinematics are presented. The inverse and forward kinematics of such robots compared with those of 6-UCU parallel robots are more complicated due to the existence of offsets between joints of RR-pairs. The characteristics of RR-pairs used in this manipulator are investigated and kinematics constraints of these offset U-joints are mathematically explained in order to find the best initial guesses for the numerical solution. Both inverse and forward kinematics of the case study 6-DOF parallel micro-manipulator are modelled and computational analyses are performed to numerically verify accuracy and effectiveness of the proposed methodologies.

Fly rhythm

This book contains 2 essays, a forward and 15 colour plates on hand made paper. The text supports research in the form of 13 images taken with a digital pinhole camera in an unconventional way ie with subject and author in motion.  The images are further removed from traditional photography by light distribution in Photoshop and printing methods displayed in the book. The essays and forward explore the phenomena of light, photography in a digital age, body memory and 'capture' of images contextualising the work in philosophical (Rosalind Krauss,Merleau Ponty) and art historical (James Turrel, Doug Wheeler) terms.

Patient participation in nursing care on medical wards: An integrative review

BACKGROUND: Patient participation is a way for patients to engage in their nursing care. In view of the possible link between patient participation and safety, there is a need for an updated review to assess patient participation in nursing care. OBJECTIVES: To investigate patients' and nurses' perceptions of and behaviours towards patient participation in nursing care in the context of hospital medical wards. DESIGN: Integrative review. DATA SOURCES: Three search strategies were employed in August 2013; a computerised database search of Cumulative Index of Nursing and Allied Health Literature, Cochrane Library, Medline and PsychINFO; reference lists were hand-searched; and forward citation searching was executed. REVIEW METHODS: After reviewing the studies, extracting study data and completing summary tables the methodological quality was assessed using the Mixed-Methods Assessment Tool by two reviewers. Reviewers met then to discuss discrepancies as well as the overall strengths and limitations of the studies. Discrepancies were overcome through consensus or a third reviewer adjudicated the issue. Within and across study analysis and synthesis of the findings sections was undertaken using thematic synthesis. RESULTS: Eight studies met inclusion criteria. Four themes were identified - enacting participation, challenges to participation, promoting participation and types of participation. Most studies included were conducted in Europe. The majority of studies used qualitative methodologies, with all studies sampling patients; nurses were included in three studies. Data were largely collected using self-reported perceptions; two studies included observational data. Methodological issues included a lack of reflexivity, un-validated data collection tools, sampling issues and low response rates. CONCLUSIONS: On medical wards, patients and nurses desire, perceive or enact patient participation passively. Challenging factors for patient participation include patients' willingness, nurses' approach and confusion around expectations and roles. Information-sharing was identified as an activity that promotes patient participation, suggesting nurses encourage active communication with patients in practice. Involving patients in assessment and care planning may also enhance patient participation. For education, enhancing nurses' understanding of the attributes of patient participation, as well as patient-centred care approaches may be beneficial for medical ward nurses. From here, researchers need to examine ways to overcome the barriers to patient participation; further nurse participants and observational data is required on medical wards.

The influence of various seat design parameters: a computational analysis

Nowadays, low back pain becomes a common healthcare problem. Poor or unsuitable seat design is related to the discomfort and other healthcare problems of users. The aim of this study is to investigate the influence of seat design variables on the compressive loadings of lumbar joints. A basis that includes a musculoskeletal human body model and a chair model has been developed using LifeMOD Biomechanics Modeller. Inverse and forward dynamic simulations have been performed for various seat design parameters. The results show that the inclination of backrest and seat pan may or may not decrease the compressive spinal joint forces, depending on other conditions. The medium-level height and depth of seat pan and the medium-level and high-level height of backrest are found to cause the minimum compressive loads on lumbar joints. This work contributes to a better understanding of sitting biomechanics and provides some useful guidelines for seat design.

Mathematical modelling of linear motion error for Hexarot parallel manipulators

Hexarot is a robotic manipulator that belongs to the family of axis symmetric parallel mechanisms. The robot is able to move the robot platform or tool center point in six degrees of freedom (DOF). This paper presents the kinematics model of the robot including the inverse and forward kinematics, and its time derivatives. Then using the kinematics formulations, investigation of the nonlinear motion of the Hexarot robot for a desired linear motion path is performed. For this purpose, the concept of curvature of the robot path is used for measuring the nonlinearity of the actual motion of the robot. The nonlinear motion error of the robot is analyzed for the scenario where the platform moves on a linear path between two arbitrary points of the robot workspace. The effects of different parameters on the nonlinear motion error of the mechanism are demonstrated and strategies for motions with low error values are proposed.

Input–output structures of the Australian construction industry

The Australian construction industry continues to play an important role in the national economy. Analysis using input–output tables makes it possible to understand the role of the construction industry in Australia’s economy and its relationships to other major industries over years. This study applies several economic indicators to investigate the construction industry’s contributions to gross national product and gross national income, as well as its backward and forward linkage indicators, and its output and input multipliers. The paper also investigates the purchases of goods and services by the construction industry from other sectors and its sales to other industries over the analysis period. Findings from this research may help policymakers to better understand the economic linkages between the construction industry and other major industries, and the structural changes in its inputs and outputs in relation to these others.

Predatory pricing and the expectation of recoupment in Australia : Boral and the pathways forward

High Court decision, Boral v ACCC in which the Court overturned the decision of the Full Federal Court and held that Boral's strategy of below cost pricing did not contravene s 46 of the Trade Practices Act - suggestion that the test of recoupment be the central test with respect to predatory pricing cases.