scholarly journals Context-Based Visual Aids to Support the Situation Awareness of Field Engineers Conducting Windstorm Risk Surveys

Author(s):  
Sruthy Agnisarman ◽  
Kapil Chalil Madathil ◽  
Jeffery Bertrand

Insurance loss prevention survey, specifically windstorm risk inspection survey is the process of investigating potential damages associated with a building or structure in the event of an extreme weather condition such as a hurricane or tornado. This process is performed by a trained windstorm risk engineer who physically goes to a facility to assess the wind vulnerabilities associated with it. This process is highly subjective, and the accuracy of findings depends on the experience and skillsets of the engineer. Although using sensors and automation enabled systems help engineers gather data, their ability to make sense of this information is vital. Further, their Situation Awareness (SA) can be affected by the use of such systems. Using a between-subjects experimental design, this study explored the use of various context-based visualization strategies to support the SA requirements and performance of windstorm risk engineers. The independent variable included in this study is the type of context-based visualizations used (with 3 levels: no visual aids, checklist based and predictive display based visual aids). We measured SA using SAGAT and performance using a questionnaire. SA and performance were found to be higher for the predictive display and checklist based conditions. The findings from this study will inform the design of context-based decision aids to support the SA of risk engineers.

2021 ◽  
Vol 83 ◽  
pp. 103108
Author(s):  
Sruthy Agnisarman ◽  
Kapil Chalil Madathil ◽  
Jeffrey Bertrand ◽  
Kalyan Piratla ◽  
Dhaval Gajjar ◽  
...  

Author(s):  
Sruthy Agnisarman ◽  
Amro Khasawneh ◽  
Amal Ponathil ◽  
Snowil Lopes ◽  
Kapil Chalil Madathil

Insurance loss prevention survey, specifically windstorm survey, is the process of investigating potential damages associated with a building or structure in the event of an extreme weather condition such as a hurricane or tornado. Windstorm inspection is a type of visual risk assessment survey performed to investigate and identify the risk factors that might result in severe damages in the event of extreme weather conditions such as hurricanes or tornados. This survey involves an engineer going to a site and inspecting the property according to a standard protocol. Though they follow the protocol, the inspection process is never straightforward. The engineers have to exercise their judgement and analytical skills while evaluating the property. This process depends highly on the skills and expertise of the engineer. This could result in certain biases and mistakes. This exploratory qualitative research investigated the sensemaking process of insurance risk engineers while performing windstorm surveys. A combination of convenient sampling and maximum variation strategy was used to recruit participants from a specific insurance company. Ten risk engineers with experience ranging from less than one year to 20 years (M = 4.7) were interviewed. Additionally, we identified a subject matter expert rom this insurance company. The subject matter expert performed a mock windstorm loss preventions survey. The mock inspection activity was video recorded. Following the mock inspection, a semi-structured interview protocol was developed to understand the sensemaking process of risk engineers. The recruited participants were interviewed via phone for 90-120 minutes. The interview responses were audio recorded and the recordings were de-identified (used numbers to identify the recordings). The responses were then transcribed by an external agency for analysis purpose. The qualitative data was analyzed following an inductive thematic approach, one of the most common qualitative data analysis methods (Padgett, 2011). The first author led the inductive coding process. The coding process was completed in two steps. In the first step, the researchers identified open codes from the transcripts and then the transcripts were coded individually and the percentage of agreement was calculated (38.4% across all transcripts). However, the coders reached complete consensus after discussion. In the next step the coding schema was updated based on the results of the first step of coding. The researchers coded the transcripts again and the percentage agreement was calculated (54% across all transcripts). The transcripts were then imported to ATLAS.ti, a qualitative data analysis software. The relationships among codes were identified using the querying capability available in the software platform. Upon completing the analysis, the SME was approached to discuss the validity of our findings. The windstorm loss prevention survey is a skill-based inspection process requiring the physical presence of the risk engineers. One of the main challenges the engineers face is the environmental uncertainty. Forecasting risk in an extreme weather condition requires the knowledge of various factors including, but not limited to, the wind speed, building dimensions, building age, roof type, roof material, building occupancy and surface roughness. This is often overwhelming to the engineers leading to certain biases and errors. Moreover, the required information about these factors is not always available to the engineers. This further complicates the risk inspection process. The engineers will have to resort to their internal guidelines and assumptions to make recommendations in such conditions. However, the validity of such recommendations/findings is questionable because it is based on various unknown or uncertain factors. The insights from this study can be used to develop automated technologies that assist risk engineers while performing the inspection task. The primary objective of the design will be to minimize information overload and to reduce the cognitive demand on the risk engineers. The next step will be to develop a cognitive task analysis report to understand the needs of risk engineers in order to develop a system that best caters to their needs.


2020 ◽  
Author(s):  
Lidya Agusti

The purpose of this study are: 1. To explain the presence or absence of influence of leadership style, work motivation and work discipline on the performance of employees Public Works Department and Spatial Planning Padang City. 2. Measuring the magnitude of the influence of leadership style, organizational culture and organizational commitment to the performance of employees of Public Works and Spatial Planning Padang City. This research was conducted in August 2017 at Public Works Department and Spatial Planning of Padang City The samples used in this study were 83 respondents. The independent variable in this research is Leadership Style (X1), Work Motivation (X2) and Work Discipline (X3). The dependent variable is Employee Performance (Y) Data collection techniques are questionnaires. Data analysis techniques using Descriptive Analysis and Inferential Analysis. To know the influence of independent variable to dependent variable partially, used t test. While to know the influence of independent variable to dependent variable simultaneously, used F test. The assumption used in validity test is if R-count> R-table item declared valid. The R-arithmetic shown in the table above, from each item indicates that R-arithmetic> R-table so the item is declared valid. Leadership Style (X1), Work Motivation (X2), Work Discipline (X3) and Performance (Y) Valid. All of the research variables had Cronbach's alpha values above 0.70 and thus expressed reliably or reliably. The value of Cronbach's alpha variable Leadership Style (X1) is 0.857, Job Motivation (X2) is 0.813, Job Discipline (X3) is 0.736, and the performance variable (Y) is 0.844. In the hypothesis testing of the study found the result that the significance value of leadership style variable (X1) is with the value (sign β = 0,049, p <0,05), Work Motivation variable (X2) with value (sign β = 0.001 p <0.05) , and Work Discipline variable (Y) with value (sign β = 0,041 p <0,05). With the finding of sign β above mentioned, it is stated that Leadership Style (X1), Work Motivation (X2) and Work Discipline (X3) have a significant effect on performance (Y) of Public Works and Spatial Planning Official of Padang City. The magnitude of the influence of the three variables on the performance of employees of Public Works Department and Spatial Planning Padang City is 27.8% (R2 = 0.278).


2020 ◽  
Vol 13 (2) ◽  
pp. 1
Author(s):  
E. M. Samogim ◽  
T. C. Oliveira ◽  
Z. N. Figueiredo ◽  
J. M. B. Vanini

The combine harvest for soybean crops market are currently available two types of combine with header or platform, one of conventional with revolving reel with metal or plastic teeth to cause the cut crop to fall into the auger header and the other called "draper" headers that use a fabric or rubber apron instead of a cross auger, there are few test about performance of this combine header for soybean in Mato Grosso State. The aim of this work was to evaluate the soybean harvesting quantitative losses and performance using two types combine header in four travel speed. The experiment was conducted during soybean crops season 2014/15, the farm Tamboril in the municipality of Pontes e Lacerda, State of Mato Grosso. The was used the experimental design of randomized blocks, evaluating four forward harvesting speeds (4 km h-1, 5 km h-1, 6 km h-1 and 7 km h-1), the natural crops losses were analyzed, loss caused by the combine harvester (combine header, internal mechanisms and total losses) and was also estimated the  field performance of each combine. Data were submitted to analysis of variance by F test and compared of the average by Tukey test at 5% probability. The results show the draper header presents a smaller amount of total loss and in most crop yield when compared with the conventional cross auger.


2012 ◽  
pp. 57-75
Author(s):  
Mohd Idris Shah Ismail ◽  
Zahari Taha ◽  
Mohd Hamdi Abdul Shukor

In this paper, the experimental design by using the Taguchi method was employed to optimize the processing parameters in the plasma arc surface hardening process. The evaluated processing parameters are arc current, scanning velocity and carbon content of steel. In addition, the significant effects of the relation between processing parameters were also investigated. An orthogonal array, signal-to-noise (S/N) ratio and analysis of variance (ANOVA) were employed to investigate the effects of these processing parameters. Through this study, not only the increasing in hardened depth and improvement in surface roughness, but the parameters that significantly affect on the hardening performance were also identified. Experimental results showed the effectiveness of this approach. Dalam kertas kerja ini, reka bentuk ujikaji menggunakan kaedah Taguchi digunakan untuk mengoptimumkan parameter pemprosesan dalam proses arka plasma pengerasan permukaan. Parameter pemprosesan yang dinilai adalah arus arka, halaju imbasan dan kandungan karbon dalam keluli. Sebagai tambahan, kesan-kesan penting yang lain seperti hubungan di antara parameter pemprosesan juga diselidiki. Tatasusunan ortogon, nisbah signal to noise (S/N) dan analisis varians (ANOVA) digunakan untuk mengkaji kesan parameter pemprosesan ini. Melalui kajian ini, bukan sahaja kedalaman pengerasan bertambah dan kekasaran permukaan lebih baik, malah parameter pemprosesan yang nyata sekali menpengaruhi prestasi pengerasan dikenal pasti. Hasil percubaan mengesahkan keberkesanan pendekatan ini.


2015 ◽  
Vol 1 (1,2) ◽  
pp. 119-128 ◽  
Author(s):  
Chitresh Saraswat ◽  
Pankaj Kumar ◽  
Dinara Kem ◽  
Ram Avtar ◽  
AL. Ramanathan

2018 ◽  
Vol 119 (2) ◽  
pp. 377-379 ◽  
Author(s):  
Jack Brooks ◽  
Jennifer Nicholas ◽  
Jennifer J. Robertson

Odor discrimination is a complex task that may be improved by increasing sampling time to facilitate evidence accumulation. However, experiments testing this phenomenon in olfaction have produced conflicting results. To resolve this disparity, Frederick et al. (Frederick DE, Brown A, Tacopina S, Mehta N, Vujovic M, Brim E, Amina T, Fixsen B, Kay LM. J Neurosci 37: 4416–4426, 2017) conducted experiments that suggest that sampling time and performance are task dependent. Their findings have implications for understanding olfactory processing and experimental design, specifically the effect of subtle differences in experimental design on study results.


2017 ◽  
Vol 12 (1) ◽  
pp. 29-34 ◽  
Author(s):  
Mica R. Endsley

The concept of different levels of automation (LOAs) has been pervasive in the automation literature since its introduction by Sheridan and Verplanck. LOA taxonomies have been very useful in guiding understanding of how automation affects human cognition and performance, with several practical and theoretical benefits. Over the past several decades a wide body of research has been conducted on the impact of various LOAs on human performance, workload, and situation awareness (SA). LOA has a significant effect on operator SA and level of engagement that helps to ameliorate out-of-the-loop performance problems. Together with other aspects of system design, including adaptive automation, granularity of control, and automation interface design, LOA is a fundamental design characteristic that determines the ability of operators to provide effective oversight and interaction with system autonomy. LOA research provides a solid foundation for guiding the creation of effective human–automation interaction, which is critical for the wide range of autonomous and semiautonomous systems currently being developed across many industries.


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