Biomedical subjects

Yang Gong

Publications and source records attributed to Yang Gong.

6 recordsLinked to original sources

PubMed2005

A human-centered design and evaluation framework for information search.

Information search in a distributed environment is an interactive process between the user and the artifact. How the information is distributed across the user and the artifact determines the efficacy of information search. Using a human-centered method, UFuRT, we developed an information search model and a taxonomy of search tasks. Further, we developed prototypes to investigate the relationship between search tasks and interface types. Preliminary results of analysis reveal the requirement of distributed information for search tasks and help understand the complexity of the tasks in different types of interfaces.

Humans↗

PubMed2005

A distributed information analysis for information search tasks.

Information search in a distributed environment is an interactive process that involves both retrieval and the processing of information across users and artifacts. How the information is distributed across internal representations and external representations affects the efficacy of information search. Using a human-centered method called UFuRT, we developed an information search model and a taxonomy of search tasks. We further developed several prototypes of information search interfaces with different patterns of distributed information and investigated the relations between search tasks and interface types. The results from the analyses show that UFuRT is a useful process that not only provides design guidelines but also generates estimates of representational efficiencies, task complexities and user behavioral outcomes.

Computer Communication Networks↗

PubMed2004

Impact of season of food frequency questionnaire administration on dietary reporting.

PURPOSE: Foods consumed near the time of food frequency questionnaire (FFQ) administration may prime the memory, such that FFQ responses emphasize recently consumed foods. This study investigates the effect of season of FFQ administration, a proxy for the recent diet, on FFQ responses. METHODS: FFQ data from 74,958 Shanghai Women's Health Study (SWHS) subjects were compared with FFQ data from these subjects by season of FFQ administration (i.e., winter, spring, summer, and fall). All analyses were adjusted for age, BMI, and energy intake. Furthermore, quintile categories derived from all study subjects were compared with categories derived from the distribution of subjects recruited in the same season. RESULTS: Compared with the study group as a whole, subjects completing the FFQ in winter reported higher intakes of meat (2.1%), vegetable (3.9%), fish (3.1%), and soy foods (4.1%), but lower fruit (- 3.9%) intake. Subjects completing the FFQ in summer reported lower than average meat (- 2.0%), vegetable (- 3.2%), fish (- 2.3%), and soy food (- 4.6%) intakes, but greater fruit intake (0.9%). Completion of the FFQ in spring and fall usually led to intermediate differences from the group average, although fruit intake was 5.9% higher among subjects completing the FFQ in the fall. Variations across macronutrients and micronutrients by season of FFQ administration were smaller. If seasonal FFQ reporting is ignored, up to 13% of subjects would be classified to a different diet intake exposure category. However, reclassification was always to an adjacent category. CONCLUSIONS: FFQ responses varied with season of FFQ administration, consistent with theory that current diet intake influences reporting of habitual past diet intake. However, season of FFQ administration did not alter dietary exposure category assignments sufficiently to effect interpretation of most epidemiologic studies.

Adult↗

PubMed2004

An information flow analysis of a distributed information system for space medical support.

In this study, we applied the methodology grounded in human-centered distributed cognition principles to the information flow analysis of a highly intensive, distributed and complex environment--the Biomedical Engineer (BME) console system at NASA Johnson Space Center. This system contains disparate human and artificial agents and artifacts. Users and tasks of this system were analyzed. An ethnographic study and a detailed communication pattern analysis were conducted to gain deeper insight and better understanding of the information flow patterns and the organizational memory of the current BME console system. From this study, we identified some major problems and offered recommendations to improve the efficiency and effectiveness of this system. We believe that this analysis methodology can be used in other distributed information systems, such as a healthcare environment.

Aerospace Medicine↗

PubMed2004

Design and development of a search interface for an information gathering tool.

In order to design effective and usable search interfaces it is essential to fully understand the characteristics of the users and the tasks they perform. In this paper we describe how to use human-centered approach to design a usable search interface. We first conducted user and task analyses of the application domain--Biomedical Engineers' log notes at NASA Johnson Space Center. From these analyses we identified what functions the users want, the tasks they perform, and a coding system for the vocabulary used by the users to log entries in the log notes. We then implemented a prototype of human-centered search interface by using the results of the user and task analyses and by applying other human-centered principles. Finally we discussed the implications of human-centered design for general health information systems.

Information Storage and Retrieval↗

PubMed2002

Comparing communication technology on Chinese, English, and Spanish diabetes web sites.

Technological and cultural factors influence access to health information on the web in multifarious ways. We evaluated structural differences and availability of communication services on the web in three diverse language and cultural groups: Chinese, English, and Spanish. A total of 382 web sites were analyzed: 144 were English language sites (38%), 129 were Chinese language sites (34%), and 108 were Spanish language sites (28%). We did not find technical differences in the number of outgoing links per domain or the total availability of communication services between the three groups. There were differences in the distribution of available services between Chinese and English sites. In the Chinese sites, there were more communication services between consumers and health experts. Our results suggest that the health-related web presence of these three cultural groups is technologically comparable, but reflects differences that may be attributable to cultural factors.

Analysis of Variance↗