Showing papers by "Auckland University of Technology published in 2008"

The value of written corrective feedback for migrant and international students

Abstract: This article provides an overview of research that has investigated the effectiveness of written corrective feedback (WCF) on ESL student writing. In doing so, it highlights a number of shortcomings in the design of some studies and explains what needs to be done in future research so that answers to the issues that have been raised can be effectively addressed. The article reports on a two-month study (with 144 international and migrant ESL students in Auckland, New Zealand) that investigated the extent to which different WCF options (direct corrective feedback, written and oral meta-linguistic explanation; direct corrective feedback and written meta-linguistic explanation; direct corrective feedback only; no corrective feedback) help students improve their accuracy in the use of two functional uses of the English article system (referential indefinite `a' and referential definite `the'). The study found (1) that students who received all three WCF options outperformed those who did not receive WCF, (2) ...

Stock market volatility around national elections

Abstract: In a sample of 27 OECD countries, this paper investigates whether the event of a national election induces higher stock market volatility. It is found that the countryspecific component of index return variance can easily double during the week around the Election Day, which attests to the fact that investors are surprised by the actual election outcome. Several factors like narrow margin of victory, lack of compulsory voting laws, change in the political orientation of the government, or the failure to form a coalition with a majority of seats in parliament significantly contribute to the magnitude of the election shock. Our findings have important implications for the optimal strategies of risk-averse stock market investors and participants of the option markets.

Understanding change of direction ability in sport: a review of resistance training studies.

Abstract: The ability to change direction while sprinting is considered essential for successful participation in most team and individual sports. It has traditionally been thought that strength and power development would enhance change of direction (COD) performance. The most common approach to quantifying these relationships, and to discovering determinants (physiological and mechanical) of COD performance, is with correlation analysis. There have not been any strength or power variables that significantly correlated with COD performance on a consistent basis and the magnitude of the correlations were, for the most part, small to moderate. The training studies in the literature that have utilized traditional strength and power training programmes, which involved exercises being performed bilaterally in the vertical direction (e.g. Olympic-style lifts, squats, deadlifts, plyometrics, vertical jumping), have mostly failed to elicit improvements in COD performance. Conversely, the training protocols reporting improvements in COD performance have utilized exercises that more closely mimic the demands of a COD, which include horizontal jump training (unilateral and bilateral), lateral jump training (unilateral and bilateral), loaded vertical jump training, sport-specific COD training and general COD training.

Exploring Customer Loyalty Following Service Recovery: The Mediating Effects of Trust and Emotions

Abstract: Existing research shows that loyalty is a function of customer perceptions of trust following service recovery. The authors propose a cognitive appraisal model that portrays trust and emotions as key mediators in the relationship between perceived justice and customer loyalty. A structural equation model was used to test the conceptual model. The findings support the conjecture that emotions and trust have important mediating roles during the service recovery process. Furthermore, while existing research has focused primarily on negative emotion, the authors' model adopts a two-dimensional view of emotion (positive and negative emotions), and the results support the inclusion of both dimensions. Overall, the empirical support for the proposed model has important managerial implications for effective relationship management. By understanding the important mediating roles of trust and emotion, service employees can deliver more effective service recovery strategies and thereby enhance customer loyalty.

High-involvement work processes, work intensification and employee well-being: A study of New Zealand worker experiences:

Abstract: High-involvement work processes are at the heart of the current interest in high-performance work systems. A study of 775 New Zealand employees shows that greater experience of high-involvement processes is associated with higher job satisfaction. To a lesser extent, there are also better outcomes in terms of job-induced stress, fatigue and work—life imbalance. However, in situations where pressures to work longer hours are higher, where employees feel overloaded and where managers place stronger demands on personal time, employees are likely to experience greater dissatisfaction with their jobs, higher stress and fatigue, and greater work—life imbalance. Increasing the availability of work—life balance policies for employees was not found to ameliorate these relationships. The study implies that organizations that can foster smarter working without undue pressures to work harder are likely to enhance employee well-being.

Relationships between reading, tracing and writing skills in introductory programming

Abstract: This study analyzed student responses to an examination, after the students had completed one semester of instruction in programming. The performance of students on code tracing tasks correlated with their performance on code writing tasks. A correlation was also found between performance on "explain in plain English" tasks and code writing. A stepwise regression, with performance on code writing as the dependent variable, was used to construct a path diagram. The diagram suggests the possibility of a hierarchy of programming related tasks. Knowledge of programming constructs forms the bottom of the hierarchy, with "explain in English", Parson's puzzles, and the tracing of iterative code forming one or more intermediate levels in the hierarchy.

Generational differences at work: introduction and overview

Abstract: Purpose – This introduction seeks to provide a brief background to the notion that there are generational differences at work and to introduce the papers included in this special issue of the Journal of Managerial Psychology.Design/methodology/approach – The current context concerning generational differences at work is briefly outlined followed by a description of the core theory underpinning the notion of generational cohorts. Criticisms of this theoretical premise are provided before a brief outline is given to each article in the special issue.Findings – There is evidence for changes in personality profiles across generations, and for differences in attitudes towards work and careers. However, effect sizes tend not to be large, and some findings are inconsistent with popular stereotypes regarding generational differences. Little support was found for differences in work values or motivation.Practical implications – Contrary to popular hype concerning generational differences at work, managerial time m...

Biofilms in the food industry: problems and potential solutions

Abstract: Summary Contamination of food by spoilage and pathogenic micro-organisms costs the food industry millions of dollars annually. Much of this contamination may be attributed to the presence of biofilms in the processing plant. In this review, we examine the properties of micro-organisms and the surfaces of processing equipment that influence the formation of biofilms. Of particular concern is the increased resistance of biofilms to cleaning and disinfection processes. Alternative means of controlling biofilm development are described and some aspects where more information is required are identified.

The effect of resisted sprint training on speed and strength performance in male rugby players.

Abstract: The aim of this literature review was to determine whether vibration training could produce chronic improvements in the physical performance of trained athletes. Although the main objective was to analyze any performance benefits, a brief review of possible mechanisms linked to performance enhancement is also included. Vibration causes an increase in the g-forces acting on the muscles, increasing the loading parameters of any exercise. Increased loading should aid muscle hypertrophy, and some authors have suggested that vibration may enhance neuromuscular potentiation. Considering the 6 studies on trained athletes, there does seem to be some evidence to suggest that vibration may provide a small benefit to maximal strength (1-repetition maximum) and power (countermovement jumps) of trained athletes. Speed does not seem to be enhanced by vibration training. There is a lack of evidence to support the theory that long-term vibration training increases neuromuscular potentiation in trained athletes. What mechanism(s) could be responsible for possible strength and power enhancement is unclear. Because whole-body vibration does not seem to be detrimental to performance when used in a controlled manner, it could provide an additional training stimulus for athletes. However, further research is required to determine optimum vibration training protocols and to clarify whether vibration training produces performance benefits greater than those of traditional training methods.

Hospitality workplace problems and poor training: a close relationship

Abstract: Purpose – This paper seeks to examine common hospitality problems with the aim of identifying relationships between them, and the central issue.Design/methodology/approach – Self‐completed questionnaires were used to collect data from hospitality students and employees, and analyses of variance used to identify relationships between the problems, and isolate the central issue.Findings – The paper finds that poor training is associated with workplace problems, and improving training is likely to reduce problems such as under‐staffing and theft.Research limitations/implications – The collection of data on exact lengths of employment would have facilitated a more rigorous analysis of the causes and effects of staff turnover and is recommended for future studies of training and turnover.Practical implications – Investment in training is recommended even when turnover is high, as training reduces workplace problems.Originality/value – This study focuses on the relationships between problems, rather than invest...

Effect of hydrotherapy on the signs and symptoms of delayed onset muscle soreness.

Abstract: This study independently examined the effects of three hydrotherapy interventions on the physiological and functional symptoms of delayed onset muscle soreness (DOMS). Strength trained males (n = 38) completed two experimental trials separated by 8 months in a randomised crossover design; one trial involved passive recovery (PAS, control), the other a specific hydrotherapy protocol for 72 h post-exercise; either: (1) cold water immersion (CWI: n = 12), (2) hot water immersion (HWI: n = 11) or (3) contrast water therapy (CWT: n = 15). For each trial, subjects performed a DOMS-inducing leg press protocol followed by PAS or one of the hydrotherapy interventions for 14 min. Weighted squat jump, isometric squat, perceived pain, thigh girths and blood variables were measured prior to, immediately after, and at 24, 48 and 72 h post-exercise. Squat jump performance and isometric force recovery were significantly enhanced (P < 0.05) at 24, 48 and 72 h post-exercise following CWT and at 48 and 72 h post-exercise following CWI when compared to PAS. Isometric force recovery was also greater (P < 0.05) at 24, 48, and 72 h post-exercise following HWI when compared to PAS. Perceived pain improved (P < 0.01) following CWT at 24, 48 and 72 h post-exercise. Overall, CWI and CWT were found to be effective in reducing the physiological and functional deficits associated with DOMS, including improved recovery of isometric force and dynamic power and a reduction in localised oedema. While HWI was effective in the recovery of isometric force, it was ineffective for recovery of all other markers compared to PAS.

Evidence-based diagnosis and treatment of the painful sacroiliac joint.

Abstract: Sacroiliac joint (SIJ) pain refers to the pain arising from the SIJ joint structures. SIJ dysfunction generally refers to aberrant position or movement of SIJ structures that may or may not result in pain. This paper aims to clarify the difference between these clinical concepts and present current available evidence regarding diagnosis and treatment of SIJ disorders. Tests for SIJ dysfunction generally have poor inter-examiner reliability. A reference standard for SIJ dysfunction is not readily available, so validity of the tests for this disorder is unknown. Tests that stress the SIJ in order to provoke familiar pain have acceptable inter-examiner reliability and have clinically useful validity against an acceptable reference standard. It is unknown if provocation tests can reliably identify extra-articular SIJ sources of pain. Three or more positive pain provocation SIJ tests have sensitivity and specificity of 91% and 78%, respectively. Specificity of three or more positive tests increases to 87% in patients whose symptoms cannot be made to move towards the spinal midline, i.e., centralize. In chronic back pain populations, patients who have three or more positive provocation SIJ tests and whose symptoms cannot be made to centralize have a probability of having SIJ pain of 77%, and in pregnant populations with back pain, a probability of 89%. This combination of test findings could be used in research to evaluate the efficacy of specific treatments for SIJ pain. Treatments most likely to be effective are specific lumbopelvic stabilization training and injections of corticosteroid into the intra-articular space.

The effect of recovery strategies on physical performance and cumulative fatigue in competitive basketball

Abstract: To evaluate the effectiveness of recovery strategies on physical performance during a 3-day tournament style basketball competition, 29 male players (mean age 19.1 years, s = 2.1; height 1.84 m, s = 0.34; body mass 88.5 kg, s = 14.7) were assigned to one of three treatment groups: carbohydrate + stretching (7.7 g · kg −1 · day −1, s = 1.7; ‘n = 9), cold water immersion (11°C, 5 × 1; n = 10) or full leg compression garments (18 mmHg, ∼18 h; n = 10). Effects of the recovery strategies on pre–post tournament performance tests were expressed as the mean change (% ± standard deviation of the change score). Changes and differences were standardized for accumulated game time, assessed against the smallest worthwhile change for each test, and reported qualitatively. Accumulated fatigue was evident over the tournament with small to moderate impairments in performance tests. Sprint and agility performance decreased by 0.7% (s = 1.3) and 2.0% (s = 1.9) respectively. Vertical jump decreased substantially aft...

Tackle Injuries in Professional Rugby Union

Abstract: BackgroundThe tackle is the most dangerous facet of play in rugby union, but little is known about risk factors for tackle injuries.PurposeTo estimate the injury risk associated with various characteristics of tackles in professional rugby union matches.Study DesignDescriptive epidemiology study.MethodAll 140 249 tackles in 434 professional matches were coded from video recordings for height and direction of tackle on the ball carrier, speed of tackier, and speed of ball carrier; injuries were coded for various characteristics, including whether the tackier or ball carrier required replacement or only on-field assessment.ResultsThere were 1348 injury assessments requiring only on-field treatment and 211 requiring player replacement. The inciting event and medical outcomes were matched to video records for 281 injuries. Injuries were most frequently the result of high or middle tackles from the front or side, but rate of injury per tackle was higher for tackles from behind than from the front or side. Ball...

Neural Mobilization: A Systematic Review of Randomized Controlled Trials with an Analysis of Therapeutic Efficacy

Abstract: Neural mobilization is a treatment modality used in relation to pathologies of the nervous system. It has been suggested that neural mobilization is an effective treatment modality, although support of this suggestion is primarily anecdotal. The purpose of this paper was to provide a systematic review of the literature pertaining to the therapeutic efficacy of neural mobilization. A search to identify randomized controlled trials investigating neural mobilization was conducted using the key words neural mobilisation/mobilization, nerve mobilisation/mobilization, neural manipulative physical therapy, physical therapy, neural/nerve glide, nerve glide exercises, nerve/neural treatment, nerve/neural stretching, neurodynamics, and nerve/neural physiotherapy. The titles and abstracts of the papers identified were reviewed to select papers specifically detailing neural mobilization as a treatment modality. The PEDro scale, a systematic tool used to critique RCTs and grade methodological quality, was used to assess these trials. Methodological assessment allowed an analysis of research investigating therapeutic efficacy of neural mobilization. Ten randomized clinical trials (discussed in 11 retrieved articles) were identified that discussed the therapeutic effect of neural mobilization. This review highlights the lack in quantity and quality of the available research. Qualitative analysis of these studies revealed that there is only limited evidence to support the use of neural mobilization. Future research needs to re-examine the application of neural mobilization with use of more homogeneous study designs and pathologies; in addition, it should standardize the neural mobilization interventions used in the study.

A review of research on the mechanical stiffness in running and jumping: methodology and implications.

Abstract: Mechanical stiffness (vertical, leg and joint stiffness) can be calculated during normal human movements, such as running and hopping. Mechanical stiffness is thought to influence several athletic variables, including rate of force development, elastic energy storage and utilization and sprint kinematics. Consequently, the relationship between mechanical stiffness and athletic performance is of great interest to the sport and research communities. Unfortunately, these relationships are relatively unexplored by researchers. For example, there are no longitudinal studies that have investigated the effects of strength or power training on mechanical stiffness levels (calculated during human running). In addition to reviewing the available literature on the relationships between mechanical stiffness (calculated during human running) and functional performance, this review focuses its discussion on the various equipment and methods used to calculate leg-spring stiffness during human running. Furthermore, future implications are presented for practitioners and researchers based on both the limitations and the gaps in the literature reviewed. It is our hope that a better understanding of mechanical stiffness will aid in improving the methodological quality of research in this area and its subsequent effect on athletic performance.

Head and Neck Position Sense

Abstract: Traumatic minor cervical strains are common place in high-impact sports (e.g. tackling) and premature degenerative changes have been documented in sports people exposed to recurrent impact trauma (e.g. scrummaging in rugby) or repetitive forces (e.g. Formula 1 racing drivers, jockeys). While proprioceptive exercises have been an integral part of rehabilitation of injuries in the lower limb, they have not featured as prominently in the treatment of cervical injuries. However, head and neck position sense (HNPS) testing and re-training may have relevance in the management of minor sports-related neck injuries, and play a role in reducing the incidence of ongoing pain and problems with function. For efficacious programmes to be developed and tested, fundamental principles associated with proprioception in the cervical spine should be considered. Hence, this article highlights the importance of anatomical structures in the cervical spine responsible for position sense, and how their interaction with the CNS affects our ability to plan and execute effective purposeful movements. This article includes a review of studies examining position sense in subjects with and without pathology and describes the effects of rehabilitation programmes that have sought to improve position sense. In respect to the receptors providing proprioceptive information for the CNS, the high densities and complex arrays of spindles found in cervical muscles suggest that these receptors play a key role. There is some evidence suggesting that ensemble encoding of discharge patterns from muscle spindles is relayed to the CNS and that a pattern recognition system is used to establish joint position and movement. Sensory information from neck proprioceptive receptors is processed in tandem with information from the vestibular system. There are extensive anatomical connections between neck proprioceptive inputs and vestibular inputs. If positional information from the vestibular system is inaccurate or fails to be appropriately integrated in the CNS, errors in head position may occur, resulting in an inaccurate reference for HNPS, and conversely if neck proprioceptive information is inaccurate, then control of head position may be affected. The cerebellum and cortex also play a role in control of head position, providing feed-forward and modulatory influences depending on the task requirements. Position-matching tasks have been the most popular means of testing position sense in the cervical spine. These allow the appreciation of absolute, constant and variable errors in positioning and have been shown to be reliable. The results of such tests indicate that errors are relatively low (2-5 degrees). It is apparent that error is not consistently affected by age, a finding similar to studies undertaken in peripheral joints. Furthermore, the range of motion in which subjects are tested does not consistently affect accuracy in a predictable manner. However, it is evident that impairments in position sense are observed in individuals who have experienced whiplash-type injuries and individuals with chronic head and neck pain of non-traumatic origin (e.g. cervical spondylosis). While researchers advocate comprehensive retraining protocols, which include eye and neck motion targeting tasks and coordination exercises, as well as co-contraction exercises to reduce such impairments, some studies show that more general exercises and manipulation may be of benefit. Overall, there is limited information concerning the efficacy of treatment programmes.

Bloom's taxonomy for CS assessment

Abstract: Bloom's Taxonomy is difficult to apply consistently to assessment tasks in introductory programming courses. The Bloom taxonomy is a valuable tool that could enable analysis and discussion of programming assessment if it could be interpreted consistently. We discuss each of the Bloom classification categories and provide a consistent interpretation with concrete exemplars that will allow computer science educators to utilise Bloom's Taxonomy for programming assessment. Using Bloom's Taxonomy to help design examinations could greatly improve the quality of assessment in introductory programming courses.

The Impact of Corporate Governance on Corporate Performance: Evidence from Japan

Abstract: Employing a unique data set provided by Governance Metrics International, which rates firms using six different corporate governance dimensions, we analyze whether Japanese firms with many governance provisions have a better corporate performance than firms with few governance provisions. Employing an overall index, we find that well-governed firms significantly outperform poorly governed firms by up to 15% a year. Using indices for various governance categories, we find that not all categories affect corporate performance. Governance provisions that deal with financial disclosure, shareholder rights, and remuneration do affect stock price performance. The impact of provisions that deal with board accountability, market for control, and corporate behavior is limited.

A study of thermo-mechanical stress and its impact on through-silicon vias

Abstract: The BOSCH etch process, which is commonly used in microelectromechanical system fabrication, has been extensively investigated in this work for implementation in through-silicon via (TSV) technology for 3D-microsystems packaging. The present work focuses on thermo-mechanical stresses caused by thermal loading due to post-TSV processes and their impact on the electrical performance of through-silicon copper interconnects. A test vehicle with deep silicon copper-plated comb structure was designed to study and evaluate different deep silicon via etch processes and its effect on the electrical leakage characteristics under various electrical and thermal stress conditions. It has been shown that the leakage current between the comb interconnect structures increases with an increase in sidewall roughness and that it can be significantly lowered by smoothening the sidewalls. It was also shown that by tailoring a non-BOSCH etch process with the normal BOSCH process, a similar leakage current reduction can be achieved. It was also shown through thermo-mechanical simulation studies that there is a clear correlation between high leakage current behavior due to non-uniform Ta barrier deposition over the rough sidewalls and the thermo-mechanical stress induced by post-TSV processes.

Shear flow and formation of Nugget zone during friction stir welding of aluminium alloy 5083-O

Abstract: The flow of the shear layer around the tool pin and how it deposits into the cavity at the trailing end of the pin to form the weld Nugget zone during friction stir welding (FSW) had not been fully understood. In this study, FSW experiments were conducted to result in pins broken and embedded in the workpiece of a work-hardened aluminium alloy during FSW, followed by metallography analysis of the weld samples. Evidence has suggested that a portion of the shear zone formed a layer and detached in a trailing–retreating location of the pin, one in each revolution. The shear layer detached from the pin leaving little material to rotate with the pin. The detached layers continued to flow, pushed by the incoming material in the shear zone, filling the stable and forward moving cavity afterward. The velocity of the freshly deposited shear layer was very low in comparison to the pin periphery velocity.

Metaphoric identity mapping: Facilitating goal setting and engagement in rehabilitation after traumatic brain injury

Abstract: Difficulty re-establishing an organised and compelling sense of personal identity has increasingly been identified as a critical theme in outcome studies of individuals with severe traumatic brain injury (TBI) and a serious obstacle to active engagement in rehabilitation. There exists little empirical support for approaches to identity reconstruction that address common impairments associated with TBI. Similarly, there is as yet little empirical support for theoretically sound approaches to promoting engagement in goal setting for this population. This article has two purposes. First, theory and procedures associated with metaphoric identity mapping are discussed in relation to goal setting in TBI rehabilitation. Second, the results of a qualitative pilot study are presented. The study explored metaphoric identity mapping as a facilitator of personally meaningful goal setting with five individuals with significant disability many years after their injury. Drawing on principles of grounded theory, the investigators extracted data from semi-structured interviews with clients and clinicians, from focus groups with the clinicians, and from observation of client-clinician interaction. Analysis of the data yielded five general themes concerning the use of this approach: All clients and clinicians found identity mapping to be an acceptable process and also useful for deriving meaningful rehabilitation goals. Both clients and clinicians saw client-centred goals as important. Cognitive impairments posed obstacles to this goal-setting intervention and mandated creative compensations. And finally, identity-related goal setting appeared to require a "mind shift" for some clinicians and demanded clinical skills not uniformly distributed among rehabilitation professionals.

Do multiple ionic interactions contribute to skeletal muscle fatigue

Abstract: During intense exercise or electrical stimulation of skeletal muscle the concentrations of several ions change simultaneously in interstitial, transverse tubular and intracellular compartments. Consequently the functional effects of multiple ionic changes need to be considered together. A diminished transsarcolemmal K+ gradient per se can reduce maximal force in non-fatigued muscle suggesting that K+ causes fatigue. However, this effect requires extremely large, although physiological, K+ shifts. In contrast, moderate elevations of extracellular [K+] ([K+]o) potentiate submaximal contractions, enhance local blood flow and influence afferent feedback to assist exercise performance. Changed transsarcolemmal Na+, Ca2+, Cl− and H+ gradients are insufficient by themselves to cause much fatigue but each ion can interact with K+ effects. Lowered Na+, Ca2+ and Cl− gradients further impair force by modulating the peak tetanic force–[K+]o and peak tetanic force–resting membrane potential relationships. In contrast, raised [Ca2+]o, acidosis and reduced Cl− conductance during late fatigue provide resistance against K+-induced force depression. The detrimental effects of K+ are exacerbated by metabolic changes such as lowered [ATP]i, depleted carbohydrate, and possibly reactive oxygen species. We hypothesize that during high-intensity exercise a rundown of the transsarcolemmal K+ gradient is the dominant cellular process around which interactions with other ions and metabolites occur, thereby contributing to fatigue.

Effects of weighted vests and sled towing on sprint kinematics.

Abstract: In this study, we compared sprint kinematics of sled towing and vest sprinting with the same relative loads. Twenty athletes performed 30-m sprints in three different conditions: (a) un-resisted, (b) sled towing, and (c) vest sprinting. During sled towing and vest sprinting, external loads of 15% and 20% of body mass were used. Sprint times were recorded over 10 and 30 m. Sagittal-plane high-speed video data were recorded at 5, 15, and 25 m from the start. Relative to the un-resisted condition, sprint time increased (7.5 to 19.8%) in both resisted conditions, resulting mainly from decreased step length (-5.2 to -16.5%) with small decreases in step frequency (-2.7 to -6.1%). Sled towing increased stance phase duration (14.7 to 26.0%), trunk angle (12.5 to 71.5%), and knee angle (10.3 to 22.7%), and decreased swing phase duration (-4.8 to -15.2%) relative to the un-resisted condition. Vest sprinting increased stance phase duration (12.8 to 24.5%) and decreased swing phase duration (-8.4 to -14.4%) and trunk angle (-1.7 to -13.0%). There were significant differences between the two resisted conditions in trunk, thigh, and knee angles. We conclude that sled towing and vest sprinting have different effects on some kinematics and hence change the overload experienced by muscle groups.