Dissertations / Theses on the topic 'Information networks Information services Human information processing'

Thesis (M. S.)--Electrical and Computer Engineering, Georgia Institute of Technology, 2008.
Ferri, Bonnie Heck, Committee Member ; Gavrilovska, Ada, Committee Member ; Yalamanchili, Sudhakar, Committee Member ; Schwan, Karsten, Committee Chair.

This research was motivated by the sudden increase of hypermedia information (such as that found on CD-ROMs and on the World Wide Web), which was not initially accessible to blind people, although offered significant advantages over traditional braille and audiotape information. Existing non-visual information systems for blind people had very different designs and functionality, but none of them provided what was required according to user requirements studies: an easy-to-use non-visual interface to hypermedia material with a range of input devices for blind students. Furthermore, there was no single suitable design and evaluation methodology which could be used for the development of non-visual information systems. The aims of this research were therefore: (1) to develop a generic, iterative design and evaluation methodology consisting of a number of techniques suitable for formative evaluation of non-visual interfaces; (2) to explore non-visual interaction possibilities for a multimodal hypermedia browser for blind students based on user requirements; and (3) to apply the evaluation methodology to non-visual information systems at different stages of their development. The methodology developed and recommended consists of a range of complementary design and evaluation techniques, and successfully allowed the systematic development of prototype non-visual interfaces for blind users by identifying usability problems and developing solutions. Three prototype interfaces are described: the design and evaluation of two versions of a hypermedia browser; and an evaluation of a digital talking book. Recommendations made from the evaluations for an effective non-visual interface include the provision of a consistent multimodal interface, non-speech sounds for information and feedback, a range of simple and consistent commands for reading, navigation, orientation and output control, and support features. This research will inform developers of similar systems for blind users, and in addition, the methodology and design ideas are considered sufficiently generic, but also sufficiently detailed, that the findings could be applied successfully to the development of non-visual interfaces of any type.

Thesis (MTech (Information Technology))--Cape Peninsula University of Technology, 2012.
This research is an attempt to investigate the utilisation of Information Communication Technology (ICT) in Healthcare to support the flow of HIV/AIDS patient’s general information in public and private sector. Furthermore, the research examines the detail flow of database information for healthcare service delivery to patients, in particular HIV/AIDS patients, in Khayelitsha Township. Finally, the research will detail the types of technologies currently being utilised to transfer this information, technology utilised for capturing or data collection profile of the patient. The research study data collecting was done in 2009 in mostly private and public healthcare centre in Khayelitsha township. First, the study will concentrate on general utilisation of ICT in healthcare service delivery and flow of information for public and private sector healthcare centres. Additionally, the research also looks at NGOs such as HIV/AIDS Unit in Cape Peninsula University of Technology (CPUT) and Treament Action Campaign (TAC) to find out what ICT equipment is being utilised to transfer this information to adult people to inform and make them to be aware of HIV/AIDS and improve healthcare service delivery to patients and particularly to HIV/AIDS patients. Taking NGO’s such as TAC and CPUT HIV/AIDS Unit that are well informed about HIV/AIDS, nationally and internationally will make our research results to be more precise. The research will also look at the utilisation of ICT in flow of information at healthcare centre such as communication between healthcare providers such as receptionist/clerk, nurses, doctors and medical researchers since they are the first people who deal with HIV/AIDS patient cases when they come for healthcare provision.

Collaborative helping via social networking conversation threads can pose serious challenges in emergency situations. Interfaces that support complex group interaction and sense-making can help. This research applies human-computer interaction (HCI), computer-supported cooperative work (CSCW), and collaboration engineering in developing an interactive design, the Mega-Collaboration Tool (MCT). The goal is to reduce the cognitive load of a group’s growing mental model, thus increasing the general public’s ability to organize spontaneous collaborative helping.

The specific aims of this research include understanding the dynamics of mental model negotiation and determining whether MCT can assist the group’s sense-making ability without increasing net cognitive load.

The proposed HCI theory is that interfaces supporting collaborative cognition motivate contribution and reduce information bias, thus increasing the information shared. These research questions are addressed: 1. Does MCT support better collaborative cognition? 2. Does increasing the size of the shared data repository increase the amount of information shared? 3. Does this happen because group members experience 1) a greater sense of strategic commitment to the knowledge structure, 2) increased intrinsic motivation to contribute, and 3) reduced resistance to sharing information?

These questions were affirmed to varying degrees, giving insight into the collaborative process. Greater content did not motive group members directly; instead, half of their motivation came from awareness of their contribution’s relevance. Greater content and organization improved this awareness, and also encouraged sharing through increased enthusiasm and reduced bias. Increased commitment was a result of this process, rather than a cause. Also, MCT increased collaborative cognition but was significantly hampered by Internet performance. This challenge indicates MCT’s system components should be redesigned to allow asynchronous interaction. These results should contribute to the development of MCT, other collaboration engineering applications, and HCI and information science theory.

Senior Health Care System (SHCS) is created for users to enter participants' conditions and store information in a central database. When users are ready for quarterly assessments the system generates a simple summary that can be reviewed, modified, and saved as part of the summary assessments, which are required by Federal and California law.

Thesis submitted in fulfilment of the requirements for the degree Master of Technology Design in the Faculty of Informatics and Design at the Cape Peninsula University of Technology Supervisor: Prof J Messeter Cape Town, 2013
The aim of this research project was to provide an answer to the question: “How can an understanding of online trust be used to build valuable online applications in Higher Education?” In order to present an answer to this question, a literature survey was conducted to establish: • An understanding of the phenomenon of online trust • What the factors are that influence a loss of trust in the online environment The literature survey highlighted several factors that influence a loss of trust in the online environment, called trust cues. These factors, however, were often tested within the E-commerce environment, and not in organization-specific contexts, such as online platforms in use in Higher Education. In order to determine whether or not these factors would influence the development of trust in context-specific environments, the author of this research grouped the indentified trust factors into three focus areas, i.e. content, ease of use, and navigation. These factors were then incorporated into a series of nine different prototypes. These prototypes were different versions of a particular online platform currently in use at the Cape Peninsula University of Technology (CPUT). The prototypes were tested over a three week period, with certain staff members at the institution in question recruited as test participants. During each week of user observations, a different focus area was targeted, in order to establish the impact that it would have on the perceived trustworthiness of the platform in question. User observations were conducted while test participants completed a standard process using the various prototypes. Semi-structured interviews were also conducted while participants completed the specific process. Participants were asked to evaluate each screen in the process according to its perceived trust worthiness, by assigning a trust level score. At the completion of the three rounds of user observations, in-depth interviews were conducted with test participants. The participants’ trust level scores for each prototype were captured and graphed. A detailed description for the score given for a particular screen was presented on each graph. These scores were combined to provide an analysis of the focus area tested during the specific round. After the three rounds of user observations were completed, an analysis of all the trust factors tested were done. Data captured during interviews were transcribed, combined with feedback received from questionnaires, and analysed. An interpretation of the results showed that not all trust factors had a similar influence in the development of trust in the online platform under investigation. Trust cues such as content organization, clear instructions and useful content were by far the most significant trust factors, while others such as good visual design elements, professional images of products, and freedom from grammatical and typographical errors had little or no impact in the overall trustworthiness of the platform under investigation. From the analysis done it was clear that the development of trust in organization-specific contexts is significantly different than developing trust in an E-commerce environment and that factors that influence the development of trust in one context might not always be significant in another. In conclusion, it is recommended that when software applications are developed in organization-specific contexts, such as Higher Education, that trust factors such as good content organization, clear instructions and useful content be considered as the most salient. Organization-specific contexts differ quite significantly in that the users of these systems often convey a certain degree of trust toward the online platforms that they work with on a daily basis. Trust factors that are geared toward developing an initial or basic trust in a particular platform, which is often the case with first time users engaging in an E-commerce platform, would therefore not be as significant in the development of a more developed level of trust, which is what is needed within the development of organization-specific online platforms.

Indiana University-Purdue University Indianapolis (IUPUI)
In today's fast paced world, people have become increasingly interested in online communication to facilitate their lives and make it faster. This goes on from simple social interactions to more advanced actions like shopping on the internet. The presence of such activities makes it crucial for people to use their common sense and judgment to process all this information and evaluate what/who they trust and what/whom they do not. This process would have been much easier if the number of people in such networks is really small and manageable. However, there are millions of users who are hooked online every day. This makes the person very overwhelmed with his trusting decision, especially when it comes to interacting with strangers over the internet, and/or buying personal items, especially expensive ones. Therefore, many trust models have been proposed by computer scientists trying to evaluate and manage the trust between users using different techniques and combining many factors. What these computer scientists basically do is coming up with mathematical formulas and models to express trust in online networks and capture its parameters. However, social scientists are the people better trained to deal with concepts related to human behaviors and their cognitive thinking such as trust. Thus, in order for computer scientists to support their ideas and get a better insight about how to direct their research, people like social scientists should contribute. With this in mind, we realized in our group work the importance of such contribution, so we came up with the idea of my research work. In my search, I tried to find how these social scientists think and tackle a dynamic notion like trust, so we can use their findings in order to enhance our work and trust model. Through the chapters, I will discuss an already developed trust model that uses measurement theory in modeling trust. I will refer back to this model and see how other social scientists dealt with some of the issues encountered by the model and its functionality. Some small experiments have been done to show and compare our results with social scientists results for the same matter. One of the most important and controversial points to be discussed from social scientists' point of view is whether trust is transitive or not. Other points to be discussed and supported by social scientists' research include aggregation, reputation, timing effects on trust, reciprocity, and experience effects on trust. Some of these points are classified into trust mapping categories and others are related to trust management or decision making stages. In sum, this work is a multidisciplinary study of trust whose overall goal is to enhance our work and results, as computer scientists.

This study involved a qualitative investigation of consulting engineers' information needs and information-seeking behaviour within the context of their project-related work roles and tasks. The research design includes a study of various information behaviour models, a systematic review of the subject literature and the exploration of relevant qualitative research methods. Data was collected through time-line interviews. The findings show how consulting engineers' work roles and tasks determine their information needs during various engineering project stages. These factors also determine the use of various sources during information seeking. Consulting engineers use a variety of information sources but rely mainly on interpersonal communication to gather information. Digital cameras are used by consulting engineers to record progress in a project. They also use Internet technologies such as email and FTP sites to communicate project related information. Recommendations were put forward for the development of an Internet-based information service for consulting engineers.
Information science
M.Inf.

Thesis (Ph. D. in Library and Information Studies)--University of California, Berkeley, May 1991.
eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 226-244).

The purpose of this qualitative study was to investigate the role of social networks in the information behaviour of consulting engineers. Wilson’s (1999; 2000) encapsulating information behaviour definition, and the contribution other researchers made to it, was used to develop an information behaviour framework for the study. In an in depth literature review it was learnt that engineering work is about team work and that engineers rely on their personal knowledge and expertise, as well as the knowledge and expertise of other experts in the field. This was confirmed by the findings of the empirical study. Throughout the literature review it was shown that the interaction between elements in the context and the personal dimension gives rise to information needs, which in turn prompt certain information behaviour activities. Narrative inquiry, a relatively new information behaviour data collection and analysis technique, guided the study. Fifteen consulting engineers who are involved in building projects participated in the study. Two chapters were dedicated to data analysis where the engineers’ stories of an engineering project were re-storied to learn more about the context of engineering work and how engineers operate. The findings revealed that the team members of projects involving consulting engineers come from different organisations. It was found that consulting engineers collaboratively seek, gather, use, communicate and share information. Interdependency emerged as a prominent element in the effective structures of consulting engineers’ personal dimension and evidently plays an important role in collaborative information behaviour in consulting engineers’ team work. It serves as a contributing factor in the natural forming of their social networks, which proved to be important sources of engineering information. The findings contributed to the refinement of the information behaviour framework developed for the purpose of this study. The framework graphically illustrates consulting engineers’ information behaviour. This study contributes to an understanding of the important role social networks play in consulting engineers’ successful accomplishment of engineering projects in everyday life
Information Science
D.Litt. et Phil. (Information Science)

The focus of this study is to investigate the information-seeking behaviour of the undergraduate art and design students of The Open Window School of Visual Communication. A qualitative approach with case study strategy is followed. For sampling purposes The Open Window School of Visual Communication was selected. Various qualitative research methods and literature on information-seeking behaviour are explored. The data were collected through one-on-one interviews. The findings show that various factors influence the information-seeking behaviour of undergraduate art and design students. Aspects in the users’ personal environment, such as meaning, experience, skills, preferences, and actions, have a significant influence on their information-seeking behaviour. Further factors deriving from the students’ context that influence their information-seeking behaviour are curricula, tasks, people (lecturers, artists, designers), sources, and technology applied to accomplish tasks. All these contributing factors have their own sets of requirements with which the art students have to comply. In addition, the findings show that the students’ digital literacy skills influence their information literacy skills. The findings also show that the factors that influence The Open Window students’ information-seeking behaviour influence the library as information service, in terms of the library sources and services the students use. Recommendations are made in order to appropriately address the information- seeking needs of this specific user group and to guide the students to best ways in information-seeking.
Information Science
M. Inf.

Public sector decision makers are confronted by pressures to make faster and better decisions as a result of the competitive environment they operate in. However, there is a trend in the public sector, including the Department of Transport (DoT) in South Africa, to invest in management information systems (MIS) that are highly fragmented and not aiding effective and timely decision-making. As a result, the country witnessed several service delivery protests since 2008 which also affected the public transport sector, such as the widespread burning of Metrorail trains several times by angry commuters. In most instances, poor service delivery emanates from the fact that public servants do not have information at their fingertips to make decisions. This quantitative study utilised Control Objectives for Information and Related Technologies 5 (COBIT 5) as a theoretical framework to investigate the integration of MIS at the DoT with a view to enhancing business intelligence for effective decision-making. Data were collected through a questionnaire directed at middle managers and senior managers that were selected through stratification of business units at the DoT, as well as analysis of documents such as system specifications and strategic plans. The study established that the DoT has several systems such as Alfresco, BAS, GIS, Logis and Persal to name a few, which serve different purposes. However, in most instances, the systems are not integrated as the current infrastructure did not support integration needs and plans to accommodate changing requirements. This is compounded by the system policy implementation constraints, as well as ageing legacy systems that are obsolete. The only component where MIS was found to be integrated, was in the financial business units (Supply Chain Management, Finance and Budgeting). Core business units use off-the-shelf systems and, in some cases, custom-made applications that do not integrate with any other system and thus hinder decision-making. In conclusion, decisions are made based on thumb-sucking, as management does not have access to comprehensive information that is stored in fragmented unintegrated systems. The study recommends that governance structures should be set up to deal with a more holistic business, information and technology architecture for the DoT that enable integration of various systems for effective decision-making. Failure to transform this pattern would lead to service delivery protests persisting. A further study on a framework to integrate MIS in the public sector is recommended.
Information Science
M. Inf.

This case study examines the James 1:27 Trust as an information, communication and technology response to the plight of orphans and vulnerable children within the context of an HIV and AIDS epidemic. The James 1:27 Trust demonstrates how social networks can be mobilized in support of children at risk. The use of business information and management systems to administer concepts such as “virtual adoption” is deemed an important innovative contribution. The James 1:27 Trust and its model is studied as a contributor in finding solutions to scale and multiply levels of care by community and faith-based organisations to orphans and vulnerable children. The James 1:27 Trust is located at the Innovation Hub in Pretoria, Africa’s first internationally accredited science park.
Social Work
M.A. (Social Behaviour in HIV/AIDS))

The main objective of this research was to investigate, analyse and evaluate attitudes towards electronic human resource management (e-HRM) tools within a large South African financial institution. This was done by developing and validating an instrument to determine e-HRM tool usage, e-HRM tool preference as well as attitudes towards e- HRM. Methodology: a total of 104 HR professionals and line managers completed the e-HRM attitudinal questionnaire. The sample demographics were obtained using analysis of the frequencies of respondents in each of the demographic categories as well as within the tool usage section and attitudinal measurement section. To ascertain the internal consistency of the attitudinal component of the e-HRM measurement instrument and the six attitudinal subscales, the Cronbach’s alpha reliability coefficient was calculated for overall scale and corresponding subscales. Due to the low reliability obtained for three of the subscales, the structure of the e-HRM measurement instrument was assessed using exploratory factor analysis. Differences between groups with regard to preference for tool usage were assessed, using Pearson’s Chi-Square tests for both the occupational and the demographic characteristics of respondents. Finally, to explore whether there were any significant differences for biographical and occupational demographics and attitude on the measurement instruments, an independent samples ttest was conducted and one-way analysis of variance (ANOVA) was used. The main finding of the study was that users of e-HRM tools had significantly more positive attitudes towards e-HRM tools than non-users.
(M.A. (Industrial and Organisational Psychology))

The evolvement of digital reporting has changed the way financial information is prepared and disseminated (Debreceny and Gray, 200 1 ). Previous research has shown that digital reporting has increased, particularly in the last five years, and this usage is characterised by greater volumes of business and financial information over that traditionally provided in print-based mode (Smith, 2003). The new opportunities and benefits offered by digital reporting are matched by challenges and implications not only for the preparers and auditors but also for users. It is expected that in the near future, financial reporting will move entirely from the primarily print-based mode to digital-based mode as the primary information dissemination channel (Oyelere et aI., 2003; Fisher et aI., 2004). Research in the area of digital reporting has been conducted in the past decade. Within this research, a considerable number of issues have been raised. These issues relate to various parties, such as policy makers, preparers, auditors, system designers and users. While several research questions and hypotheses concerning these parties have been posed and investigated, most of the research questions and hypotheses have been formed from a preparers' perspective, leaving the examination of issues from a users' perspective largely unexplored. This study focuses on users. It examines the effect of presentation formats on decision makers' performance in relation to decision quality, perceptions and cognitive information processing in the digital reporting environment. It aims to extend the digital reporting literature. This study extends the existing body of knowledge on digital reporting environment in several ways. First, this study examines the effect of presentation formats on the quality of users' decision making. This study follows Kleinmuntz and Schkade (1993) who described 'decision quality' in the context of two cost-benefit dimensions in relation to decision makers' cognitive processes, namely decision accuracy and cognitive effort. Decision accuracy reflects the ability of a strategy to produce an accurate outcome while cognitive effort reflects the total cognitive expenditure incurred in completing a task. Second, this study examines users' perceptions of three digital presentation formats: PDF, HTML and XBRL. This study compares subjects' perceptions of usefulness and ease of use of the three presentation formats with their actual outcome. It also includes examining whether perceptions are an important factor in influencing preferred presentation format. Finally, this study examines whether digital presentation formats address the concern over functional fixation in the accounting context of 'recognition versus disclosure' in the reporting of financial information. This study used public accounting practitioners in New Zealand as participants. Sixty two subjects participated in the experiment, which involves an experiment exercise and a post experiment questionnaire. The results indicate that presentation formats impact on decision accuracy. This finding is consistent with previous studies conducted using non-digital presentation formats such as tabular and graphical in the psychology and information systems literature (Stock and Watson, 1984; Dickson et aI., 1986; Iselin, 1988; DeSanctis and Jarvenpaa, 1989; Mackay and Villareal, 1987; Hard and Vanacek, 1991; Stone and Schkade, 1991; Anderson and Kaplan, 1992; Bricker and Nehmer, 1995; Ramarapu et aI., 1997; Frownfelter-Lohrke, 1998; Almer et aI., 2003). The results, however, indicate that presentation formats do not impact decision makers' cognitive effort. These findings suggest that preparers, standardsetters and regulatory bodies should recognise that presentation format impacts on users' decision making processes and select appropriate formats that lead to improvement in decision making. Additionally, the results indicate that users' perceptions of the usefulness and ease of use of the reporting technologies are similar across the three presentation formats. The results also show that users' perceptions do not necessary correspond to actual performance. Users' perceptions are found to influence their preferred presentation format. The findings of this study provide useful insights on users' perceptions, performances and preferences of the digital presentation formats. Such results provide a holistic and comprehensive view of the importance of perceptions and the effect of presentation formats on decision makers' performance. This is particularly relevant since if more advanced forms of digital reporting are to be encouraged, then there is also the need for users to be made more aware of the benefits to be gained from the different forms of presentation. Finally, the results show that of the four recognised stages of information processing (i.e. acquisition, evaluation, weighting and judging information), functional fixation is found to only exist at the judgment stage. However, the effect of presentation format is only significant at information evaluation stage. The results indicate that the interaction between presentation formats and placement of information does not affect decision makers' information processing. This suggests that presentation formats do not solve the concern about recognition versus disclosure (functional fixation) in information processing stages. These fmdings are not consistent with Hodge et al. (2004) but are consistent with Luft and Shields (2001) who suggest functional fixation could not be alleviated because the accounting itself would affect the allocation of people's attention. This study extends the literature on presentation format by examining the quality of decision making arising from the use of different presentation formats in a digital reporting environment. It provides evidence that users' perceptions of ease of use of a presentation format do not necessarily correspond to their actual performance (cognitive effort) once a particular task has been performed. This study also provides evidence that the acceptance of a technology is highly dependent on the perceptions of that technology. Therefore, limited knowledge and appreciation of the capabilities of a technology may have the undesired effect of deterring use of the technology although it may improve performance.

The purpose of the study was to describe the effects of an EMR on patient management in selected HIV clinics in Johannesburg. A quantitative, descriptive, cross-sectional study was undertaken in four HIV clinics in Johannesburg. The subjects (N=44) were the healthcare workers selected by stratified random sampling. Consent was requested from each subject and from the clinics in Johannesburg. Data was collected using structured questionnaires. Median age of subjects was 36, 82% were female. 86% had tertiary qualifications. 55% were clinicians. 52% had 2-3 years work experience. 80% had computer experience, 86% had over one year EMR experience. 90% used the EMR daily, 93% preferred EMR to paper. 93% had EMR training, 17% used EMR to capture clinical data. 87% perceived EMR to have more benefits; most felt doctor-patient relationship was not interfered with. 89% were satisfied with the EMR’s overall performance. The effects of EMR benefit HIV patient management.
Health Studies
MA (Public Health)

Indiana University-Purdue University Indianapolis (IUPUI)
Reducing medical error remains in the forefront of healthcare reform. The use of health information technology, specifically the electronic health record (EHR) is one attempt to improve patient safety. The implementation of the EHR in the Emergency Department changes physician workflow, which can have negative, unintended consequences for patient safety. Inaccuracies in clinical documentation can contribute, for example, to medical error during transitions of care. In this quasi-experimental comparison study, we sought to determine whether there is a difference in document quality, error rate, error type, cognitive load and time when Emergency Medicine (EM) residents use paper charts versus the EHR to complete physician documentation of clinical encounters. Simulated patient encounters provided a unique and innovative environment to evaluate EM physician documentation. Analysis focused on examining documentation quality and real-time observation of the simulated encounter. Results demonstrate no change in document quality, no change in cognitive load, and no change in error rate between electronic and paper charts. There was a 46% increase in the time required to complete the charting task when using the EHR. Physician workflow changes from partial documentation during the patient encounter with paper charts to complete documentation after the encounter with electronic charts. Documentation quality overall was poor with an average of 36% of required elements missing which did not improve during residency training. The extra time required for the charting task using the EHR potentially increases patient waiting times as well as clinician dissatisfaction and burnout, yet it has little impact on the quality of physician documentation. Better strategies and support for documentation are needed as providers adopt and use EHR systems to change the practice of medicine.

This thesis is an account of how a networking approach may assist participatory community development. The author undertakes naturalistic action research into how she can improve her social practice with a view to gaining equal participation amongst university and community members in a community development practicum. She describes how efforts to maximize group participation are typically countered with various forms of non-participation, analogous to a rebellion against authoritarianism. Dialogue with her doctoral peer group about tacit meanings from her personal history reveals that she is too heavily invested in community involvement. A stance of irreverence gives her the freedom to realize that her politically correct approach is conveying the message that "MY way of participation is THE way". She embarks on a networking programme of action in the hope of achieving more balanced participation. A multidisciplinary workshop and a study tour show her that openness to multiple inputs may free people from restrictive views and problematic styles of participation. She initiates the formation of a local network and finds that this is a more free-flowing structure that encourages fluid problem solving among community, government and university participants. The author's original anxieties are, however, revived when networking, too, becomes entangled in organizational complexities. She eventually realizes that she tends to base her actions on premises of power and justice and that it may be helpful to base new ventures on information flow and creativity instead. Her new approach to group facilitation elicits creative inputs from others. She finds that deliberate debate of the assumptions on which collective undertakings are based releases an awareness of alternative approaches to addressing unequal resource utilization in the commons. A review of the local Network's development over six years draws attention to networking resources, and its uses, structuring and management. The author's experiences continuously demonstrate that the assumptions of independence and freedom of choice may provide a more satisfactory basis upon which to manage community participation.
Social Work
D.Litt. et Phil. (Psychology)