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Neşe Zayim,Hasibe Yildiz,Yilmaz Kemal Yüce 대한의료정보학회 2023 Healthcare Informatics Research Vol.29 No.4
Objectives: Mobile health applications that are designed without considering usability criteria can lead to cognitive overload,resulting in the rejection of these apps. To avoid this problem, the user interface of mobile health applications should be evaluatedfor cognitive load. This evaluation can contribute to the improvement of the user interface and help prevent cognitiveoverload for the user. Methods: In this study, we evaluated a mobile personal health records application using the cognitivetask analysis method, specifically the goals, operators, methods, and selection rules (GOMS) approach, along with the relatedupdated GOMS model and gesture-level model techniques. The GOMS method allowed us to determine the steps of the tasksand categorize them as physical or cognitive tasks. We then estimated the completion times of these tasks using the updatedGOMS model and gesture-level model. Results: All 10 identified tasks were split into 398 steps consisting of mental andphysical operators. The time to complete all the tasks was 5.70 minutes and 5.45 minutes according to the updated GOMSmodel and gesture-level model, respectively. Mental operators covered 73% of the total fulfillment time of the tasks accordingto the updated GOMS model and 76% according to the gesture-level model. The inter-rater reliability analysis yielded anaverage of 0.80, indicating good reliability for the evaluation method. Conclusions: The majority of the task execution timescomprised mental operators, suggesting that the cognitive load on users is high. To enhance the application's implementation,the number of mental operators should be reduced.
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Dilek Evecan,Esra Zayim 한국물리학회 2019 Current Applied Physics Vol.19 No.2
In the last few decades, there has been a surge of interest in using tungsten oxide thin films as an active layer of electrochromic device. These devices have several practical applications such as smart window of buildings and automobile glazing for energy saving. The main objective of this work was to construct highly homogeneous and uniform e-beam evaporated amorphous WO3-x based films into electrochromic devices, which were fully characterized for switching speed, coloration efficiencies and cycling voltammetry responses. Fabricated devices contain indium doped transparent oxide coated glass as the transparent conductive electrode, ∼200 nm thickness of WO3-x as the cathodically coloring material and a lithium perchlorate based conducting gel electrolyte. Xray diffraction patterns indicate that all as-deposited films are amorphous. Experimental results showed that both solid and liquid electrolyte electrochromic devices are initially very transparent that exhibit perfect optical modulation and coloration efficiency (up to 68.7 cm2 /C and 52.6 cm2 /C at 630 nm, respectively) due to easier intercalation of the Li+ within their structure. One of the more significant findings to emerge from this study is that e-beam coated electrochromic devices based on tungsten oxide thin films showed superior performance among to other coating methods. Therefore, excellent reversibility of color change behavior is attractive for pertinent use in electrochromic energy storage devices.
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