SOFTWARE USABILITY SLP Essay Example | Topics and Well Written Essays - 500 words

SOFTWARE USABILITY SLP - Essay Example Operations tell the performance levels of the software for certain tasks. A breakthrough in software usability evaluation came from Shackel (1991). It defines usability as the capability of artifact in terms of human functions. These human functions will enable the softwares easy, satisfactory and effective use by its users. It places the usability to the level of interaction between artifact and users. When the criteria of software usability are set, the approach supports the process of evaluation and the interpretation of results. Usability thus is not limited to features of the interface, but it is a measure of "interaction" between human and computer. There exist different methods to evaluate software usability. It depends on time, labor, evaluator – experience, development stage, preference, and facilities. In wider terms, the distinction in evaluation methods is user based, expert-based and model-based. The user-based methods are more realistic in estimation of usability and give a very concise record of significant problems. But this method is time-consuming and expensive for larger samples. The expert based models are cheap and fast. But here, there is a risk of overestimation of the actual number of problems. The model-based method gives a laborious estimate of the standard of software usability. The main disadvantage is it has a limited applicability in task. Hence, after that HCI came into existence. The four approaches are Eberts (1994) describes the user interface designs to be user-friendly, intuitive and efficient. He defines four approaches to HCI. Anthropomorphic, Cognitive, Empirical and predictive. The anthropomorphic way designs a user interface that possesses human-like qualities, for example, in interface error messaging, avatars or sounds. The cognitive approach considers the potential of human brain and senses, in order to develop the interface to support the user. A metaphoric design is one such example

Health risk and benfits of energy drinks Essay Example | Topics and Well Written Essays - 1000 words

Health risk and benfits of energy drinks - Essay Example As such, it could be suggested that consumption of energy drinks has increased. The statistics are threatening given the fact that energy drinks have numerous risks that outweigh the benefits of the products as the discussion below portrays. Energy drinks have a number of advantages that manufacturers and marketers continue to sell in order to grow their markets. The main advantage arises from the product’s name and primary purpose. Energy drinks enhance the performance of the body. The drinks have high levels of caffeine and sugar. The sugar exists in the form of fructose and glucose that dissolves rapidly into the blood stream thereby providing a spontaneous boost in the performance of the body. Such impulsive boost in the performance of the body is always desirable especially in cases where the body shows signs of strain that affect the performance. Athletes for example may suffer from acute exhaustion and would require the rejuvenation of their energy levels. An increasing number of young people also continue to use energy drinks given their desire to have full functionality during most hours of the day (Burrows, Pursey & Neve, 2005). The use of energy drinks to revamp the performance of the body requires adequate education in order to possess the basic knowledge on the ingestion of fructose and glucose in the energy drinks. People must consume an adequate quantity of solid foods as well in order to complement the caffeine and sugar in the energy drinks. This way, the body benefits from numerous other nutrients from the solid foods that make it easy for the body sustain the demands of the energy drinks. Most people use energy drinks without eating adequate quantities of other solid foods, such imbalances have varied effects since the body lacks the mass and protein to enhance the increased performance of the body (Reissig, Strain & Griffiths, 2009). Among the