Thesis (PhD(Agric) (Horticulture))--Stellenbosch University, 2008. / Lack of winter chilling is a major problem in producing temperate-zone fruit in warm climates. Delayed foliation and protracted bud burst and flowering are the main problems necessitating artificial means to break dormancy. In South Africa (SA), most apple production areas receive insufficient winter chilling, and an annual application of rest breaking (RB) agents is included as standard practice. The most used RB agent in SA was dinitro-o-cresol (DNOC) but its use was discontinued. Hydrogen cyanamide (HC) became the replacement. It has been effective in apple, but variable effects on fruit set, blossom, yield and fruit quality have been reported. Thidiazuron (TDZ) has also shown the ability to break dormancy in apples. Another important practice in apple production is chemical thinning (CT). However, results are highly influenced by the type of chemical, weather conditions, cultivar and blossom pattern. With the increasing efficacy of RB and by identifying its effects on vegetative and reproductive development, it will be possible to determine more effective chemical thinning treatments. The objective of this study was to determine appropriate RB treatments for apple trees in a warm winter climate, identifying their effect on vegetative and reproductive development and the influence on CT efficacy. The research was performed in the Elgin area (34°S, 300 m) SA, over a period of three years, on ‘Golden Delicious’ and ‘Royal Gala’. In evaluating the effect of different HC concentrations and oil, no synergistic or antagonistic effects were observed on budburst and yield. Mineral oil at 4% plus 1 to 2% Dormex® combined were sufficient to break dormancy. Dormex® at 4% (2.08% HC) reduced fruit set and yield. In general, the rest breaking treatments (DNOC, HC and TDZ) enhanced the final vegetative bud burst compared to the control, while reproductive bud burst in 2002 and 2003 was not significantly influenced. The treatments compressed and advanced flowering periods, but this effect was not always evident when the spring was warm. The treatments synchronised flowering on the tree and between the two cultivars. The mixture of 0.245% HC and 4% oil was less effective in terms of increasing bud burst in ‘Royal Gala’ compared to other rest-breaking treatments. The mixture of 0.49% HC and 4% oil effectively compressed and synchronised flowering in ‘Golden Delicious’. TDZ-oil used at the lower rates also increased bud burst and concentrated flowering. However, it appears that after a cooler winter, higher rates could result in an exacerbated bud burst effect with excessive vegetative growth. The rate and timing of TDZ-oil application influenced the reproductive development of apples and therefore fruit quality. In ‘Golden Delicious’ increased fruit set, number of seeds, and reduced fruit russeting appear as beneficial results of TDZ-oil, whereas fruit set and russeting was not affected in ‘Granny Smith’. TDZ-oil, when applied late and at increasing rates, led to an increase in the malformation of calyx cavities, especially when chemical thinning was performed using the cytokinin-like compound benzyladenine. The effect seemed to be cultivar specific, with ‘Golden Delicious’ being the most severely affected. Increased return bloom in response to late TDZ application in ‘Golden Delicious’ and ‘Royal Gala’ appeared to be beneficial.

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The project investigated the advantages and disadvantages of Go while abooking system for Tieto was developed. The frameworks and APIs AngularJS,REST, JSON and mongoDB were used during the development of thebooking system. The result was a fully working stand-alone booking systemwith a login functionality. The back-end server was written in Go while thefront-end client was written in JavaScript using AngularJS. / Projektet undersökte fördelarna och nackdelar med Go medan ett bokningssystemför Tieto utvecklades. Under utvecklingen av bokningssystemet såanvändes ramverken och APIerna AngularJS, REST, JSON och mongoDB.Resultatet blev ett fullt fungerande fristående bokningssystem med supportför inloggning. Back-end servern var skriven i Go medan front-end klientenvar skriven i JavaScript med AngularJS.

Often times groups of domain experts, such as scientists and engineers, will develop their own software modules for specialized computational tasks. When these users determine there is a need to integrate the data and computations used in their specialized components with an enterprise data management system, interoperability between the enterprise system and the specialized components rather than re-implementation allows for faster implementation and more flexible change management by shifting the onus of changes to the scientific components to the subject matter experts rather than the enterprise information technology team. The Jython-based RESTful web service API was developed to leverage code reflection to provide access to Python scripts via RESTful web service calls, providing access to any function available in a Python script accessible to the REST server.

Two areas of research are reported: an experiment on the effects of warm temperature prestratification treatments on seed dormancy and a new chill unit model. Crabapple seeds (Malus sargentii Rehd.) were allowed to imbibe water and were given warm pretreatments at temperatures of 16, 20, 24 and 28C for periods of 3, 10, 20 or 30 days before cold stratification at 4C for 20, 40, 60, 80 or 100 days. Pretreatments resulted in increased chilling requirements for seedling emergence. A short chilling period (20 days) also altered the leaf area, shoot length, internodal length and root/shoot ratio of the resulting seedlings. The new chill unit model was developed from data from seed experiments and tested with records of 11 years. A three-dimensional model for the transition through apple tree dormancy is proposed. The new model evaluates the effectiveness of different temperatures for the transition between dormancy induction and dormancy release according to physiological time. The standard of measurement for this model is the chill unit (CU), which is defined as the equivalent of one-hour exposure to the optimal temperature during the optimal physiological time for dormancy development. The general pattern of temperature activity for dormancy development is sigmoidal; and temperature effectiveness through the process varies according to length of exposure, temperature cycling and time. The new model permits a more accurate prediction of dormancy development under subtropical conditions than previous models and will predict the amount of leafing that will occur in spring. The prediction efficiency of leafing under subtropical conditions was improved from an r2 of 0.66 for the Utah Chill Unit Model to an r2 of 0.74 for the new model when compared under Mexican conditions.

Thesis (M.Sc.)--York University, 2004. Graduate Programme in Kinesiology and Health Science. / Typescript. Includes bibliographical references (leaves 61-64). Also available on the Internet. MODE OF ACCESS via web browser by entering the following URL:http://gateway.proquest.com/openurl?url%5Fver=Z39.88-2004&res%5Fdat=xri:pqdiss&rft%5Fval%5Ffmt=info:ofi/fmt:kev:mtx:dissertation&rft%5Fdat=xri:pqdiss:MQ99385

The types of content being transferred over the Internet are getting richer and larger; the number of social media channels users have to sift through to publish and find content is also increasing. Average users are uploading and downloading richer and larger media files as they feel the urge to share their content with others. This work explores a novel process for publishing personal media files on social applications, where the publisher retains control over the media, while the implementation follows the principles of the WWW. The Personal URI Channel (PURIC) system is introduced as a process that can take place along side social applications like email clients, social networking sites (i.e. Twitter and Facebook), and emerging decentralized social networking sites. The PURIC system is a media resource link management tool used for publishing and maintaining the links published on social applications. This work explores the feasibility, benefits, and drawbacks of the PURIC system. It reveals the modularity and scalability of the system, and how it compliments social applications without placing too much load on network traffic and server-side cpu processing.

The aim of this study was to determine whether there was an association between a failed test of cough reflex sensitivity and history of chest infection in a general population of rest home residents. One hundred rest home residents from four different levels of care (rest home, hospital, dementia and psycho-geriatric) were recruited and their cough reflex assessed using a solution of 0.6 Mol/L citric acid nebulised and presented via a facemask.Participant’s records were then checked to see if there were any documented episodes of chest infection in the 6 month period prior to cough reflex testing.The results showed that out of 100 participants, 4 failed the cough reflex test. Of the 4 that failed the test, 3 had no documented episodes of chest infections recorded in the 6 month period prior to cough reflex testing. Data was not available for one participant who was deceased by the time of collection of the second data set. As such, there was no direct association demonstrated between a failed cough reflex test and development of chest infection or aspiration pneumonia. The results of the study are unexpected in two ways. Firstly, the relatively low number of participants who failed the cough reflex test is surprising as 72% of the participants for whom a full data set was obtained had neurological conditions that are known predisposing factors for reduced cough reflex sensitivity. Secondly, the finding of no association between a failed cough reflex test and history of recorded chest infection is not consistent with other studies. There is however an established body of research that indicates the causes of aspiration pneumonia are multifactorial and not solely dependent upon aspiration. The characteristics of participants and the implications of the findings are described. The potential use of cough reflex testing as a tool to screen against the risks of silent aspiration in relation to assessment of oro-pharyngeal dysphagia in this frail, elderly population is discussed.

In the era of mobile cloud computing, the consumption of virtualized software and Web-based services from super-back-end infrastructure using smartphones and tablets is gaining much research attention from both the industry and academia. Nowadays, these mobile devices generate and access multimedia data hosted in social media and other sources in order to enhance the users’ multimedia experience. However, multimedia data is unstructured which can lead to challenges with data synchronization between these mobile devices and the cloud computing back-end. The issue with data synchronization is further fueled by the fact that mobile devices can experience intermittent connectivity losses due to unstable wireless bandwidths. While previous works proposed Simple Object Access Protocol (SOAP) -based middleware for the Web services’ synchronization, this approach is not efficient in a mobile environment because the SOAP protocol is verbose. Thus, the Representational State Transfer (REST) standard has been proposed recently to model the Web services since it is lightweight. This thesis proposes a novel approach for implementing a REST-based mobile Web Service for multimedia file sharing that utilizes a channel-based publish/subscribe communication scheme to synchronize smartphone or tablet-hosted NoSQL databases with a cloud-hosted NoSQL database. This thesis evaluates the synchronicity and the scalability of a prototype system that was implemented according to this approach. Also, this thesis assesses the overhead of the middleware component of the system.

This study explores and examines the roles of caregivers within rest home facilities in New Zealand; and specifically, how they unpack and deal with managing the tensions associated with end of life (EOL) care. It adopted a qualitative perspective to enable an exploration of how the experiences of caregivers help guide their practice and understanding of their roles in relation to EOL care. A grounded theory framework was utilised in order to explore how caregivers make meaning and find value in the roles they perform within rest home facilities. This study offers insights into some of the tensions that caregivers face in a working environment where life and death occur simultaneously. It was apparent that caregivers are aware of the many social taboos they must negotiate in order to conduct their work. It was also apparent that they understood that others might perceive their work as dirty but that this did not prevent them from finding job satisfaction and create meaning in their work. Instead, they created meaning by using the conceptual tool the imagination of care. This involved utilising their imagination and past experiences to enable EOL care which represented the dying rites of individual residents but also fitted within their ethic of care.