P143 INSTRUCTION AND FEEDBACK METHOD FOR LAPAROSCOPIC HERNIA REPAIR USING SELF-MADE MANUAL WITH SELF-ASSESSMENT SHEET

Aim We use the self-made manual to understand procedures easily, and the self-assessment sheet to improve trainees' skills efficiently. We investigated the effect of this method for trainees in laparoscopic inguinal hernia repair. Material and Methods In the original manual, surgical procedures and how to make surgical fields are explained using intraoperative photos, in order to clarify the purpose of the procedures in each scene of surgery. We also made the self-assessment sheet that sets goals according to the manual, and evaluates the trainee's attainment objectively. Trainees score the assessment sheet after every surgery. Trainers evaluate their sheets and give feedback on their skills with a radar chart. Results By using the same manual, trainees and trainers could share the same terms and thoughts easily during surgery. The self-assessment sheet made trainees effective to understand their weak points and improve their skills. At the beginning of the training, the much-experienced trainee got a higher score. As trainees experienced surgeries, they became getting higher scores. There was a significant correlation between a high score and a short operation time. A radar chart helped efficiently to understand trainees' weak points. Conclusions Using the self-made manual and the self-assessment sheet together was useful for both the trainer and the trainees to evaluate their attainment objectively. Scores and graphs helped trainees assess their skills efficiently.

Model Test on the Influence of Surcharge, Unloading and Excavation of Soft Clay Soils on Shield Tunnels

In view of the influence of symmetrical surcharge, unloading and excavation of soft clay soils on shield tunnels, the surface settlement, tunnel settlement, vertical additional earth pressure and tunnel additional confining pressure are measured by an indoor model test. The changes of confining pressure, tunnel settlement, surface settlement and vertical earth pressure caused by surcharge, unloading and excavation are studied and analyzed. The results show that, in soft clay, surcharge will cause tunnel settlement, and unloading and excavation will generally cause tunnel uplift. There is hysteresis in surface settlement and tunnel settlement above the shield tunnel caused by surcharge and unloading; the change of additional confining pressure of the shield tunnel caused by surcharge is mainly concentrated in the three directions of 3, 5 and 7 of the radar chart. These points belong to weak points. Unloading and excavation can effectively reduce the additional confining pressure of the tunnel in these three directions; excavation will cause the increase of vertical cumulative additional earth pressure and tunnel confining pressure in local directions. The influence range of surcharge in soft clay is wider than that in sand, but the depth is relatively shallow.

Development of a circularity assessment method for facade systems

Various authorities identify the circular building strategy as the best way to reduce the environmental impact of the building sector. The EURECA project aims to develop a circular facade system for the renovation of high-rise buildings. The circularity of the facade systems proposed within the project should be evaluated in an objective manner. Current circularity assessment methods exist, however, they appear unfit to evaluate facade systems at an early design stage. Based on the analysis of existing assessment methods a new circularity assessment method is developed. The developed method allows to measure the circularity on element level with a limited amount of required information, allowing early stage decision-making. The method considers the parameters recycling, environmental cost, expected service life, component dependency, layer dependency and flexibility for reuse. The method is tested on four facade renovation systems: standard ETICS, circular ETICS, ventilated facade with rigid insulation and ventilated facade with flexible insulation. The circularity of each system can be represented by a radar chart, giving the score per parameter, or by a single score. In addition to the circular aspect, the financial aspect is added in the evaluation of the facade systems by using the Pareto front method.

A Unified Parameter to Represent Reservoir Heterogeneity

We aim to find a universal method and/or parameter to quantify impact of overall heterogeneity on waterflood performance. For this purpose, we combined the Lorenz coefficient, horizontal permeability to vertical permeability ratio, and thief zone permeability to average permeability ratio, with a radar chart. The area of the radar chart serves as a single parameter to rank reservoirs according to heterogeneity, and correlates to waterflood performance. The parameters investigated are vertical and horizontal permeability. Average porosity, initial water saturation, and initial diagonal pressure ratio are kept constant. Computer based experiments are used over the course of this entire research. We conducted permeability studies that demonstrate the effects of thief zones and crossflow. After normalizing these parameters into a number between 0 and 1, we then plot them on a radar chart. A reservoir's overall degree of heterogeneity can be inferred using the radar chart area procedure discussed in this study. In general, our simulations illustrate that the larger the radar chart area, the more heterogenous the reservoir is, which in turn yields higher water cut trends and lower recovery factors. Computer simulations done during this study also show that the higher the Lorenz coefficient, the higher the probability of a thief zone to exist. Simulations done to study crossflow also show certain trends with respect to under tonguing and radar chart area.

THE USE OF THE RADAR CHART TO PRESENT THE RESULTS OF A COMPREHENSIVE URBAN ASSESSMENT ON THE MATERIALS OF THE CITY OF TYUMEN

The article analyzes the possibility of using a radar chart to present the results of a comprehensive urban assessment. The factors for the favorable development of the city's territory, used for a comprehensive urban planning assessment, were selected on the basis of a unified socio-ecological and economic system. The author analyzes the advantages and disadvantages of the point-based assessment system, while a 10-point scale was set for all factors of a comprehensive urban planning assessment, and the parameter values were estimated. The approbation was carried out on the materials of nine planning districts of the city of Tyumen, conclusions were drawn and a characteristic of the level of favorable development of the city territory was given.

Soil environmental quality in Nanling commodity grain base based on equal intercept transformation radar chart

This paper introduces for the first time the equal intercept transformation radar chart—an improved form—to the assessment of soil environmental quality of Nanling commodity grain base. The equal intercept transformation radar chart, a visual graphical data analysis method, translates data from a numerical to graphical format. This visualization enables data presentation, analysis process and results stick out a mile and is capable of fully retaining information contained in data and excavating it in depth from geometry. Moreover, it overcomes pertinently the main defect of the conventional radar chart that the evaluation result depends heavily on the order of arrangement of indicators. The results indicated that the soil environmental quality at depths of 0–60 cm in the low mountain area of the Nanling commodity grain base was the second grade, while that in the hilly and plain areas were both first grade. The indicators of poor soil environmental quality in the low mountain area were exogenous Cd and endogenous As; those in the hilly area were exogenous Cd and endogenous As and Hg; and that in the plain area was exogenous Cd. The results were in line with the actual situation of the study area.

Developing a Novel Fuzzy Evaluation Model by One-Sided Specification Capability Indices

When all of the one-sided specification indices of each quality characteristic reach the requirements of the process quality level, they can ensure that the process capability of the product meets the requirements of the process quality level. This study constructs a fuzzy membership function based on the upper confidence limit of the index, derives the fuzzy critical value, and then labels the fuzzy critical value on the axis of the visualized radar chart as well as connects adjacent critical points to shape a regular polygonal critical region. Next, this study calculates the observed value of the index to estimate and mark it on the axis for forming a visualized fuzzy radar evaluation chart. Obviously, this fuzzy evaluation model not only reduces the testing cost but also makes the quality level quickly meet the requirements of the specifications. Further, the radar chart can reduce the risk of misjudgment attributable to sampling errors and help improve the accuracy of evaluation by a confidence-upper-limit-based fuzzy evaluation model. Therefore, this easy-to-use visualized fuzzy radar evaluation chart is used as an evaluation interface, which has good and convenient management performance to identify and improve critical-to-quality quickly. Improving the quality of the process before the product is completed will also have the advantage of reducing social losses and environmental damage costs.

The Identification of Problems in Production Process Using Elements of Second Toyota’s Management Principle – Case Study

The paper presents a case study of the practical use of BOST surveys to identify problems that are the most important in production process. The research object is company from electrical industry. It was made the identification and of areas geneating problems from the second Toyota’s management principle point of view. Analysis of the research results was presented in the form of tables, histograms, radar chart and some statistical tools. Some production workers of the company with the help of BOST questionnaire survey showed, which factors are the most important. The aim of the analysis is to present which factors are the most important by building the significance sequences of obtained results. The results obtained for the type of small and medium-sized enterprises overlap with the results of tests verified in other enterprises.

Bot Datasets on Twitter: Analysis and Challenges

The reach and influence of social networks over modern society and its functioning have created new challenges and opportunities to prevent the misuse or tampering of such powerful tools of social interaction. Twitter, a social networking service that specializes in online news and information exchange involving billions of users world-wide, has been infested by bots for several years. In this paper, we analyze both public and private databases from the literature of bot detection on Twitter. We summarize their advantages, disadvantages, and differences, recommending which is more suitable to work with depending on the necessities of the researcher. From this analysis, we present five distinct behaviors in automated accounts exhibited across all the bot datasets analyzed from these databases. We measure their level of presence in each dataset using a radar chart for visual comparison. Finally, we identify four challenges that researchers of bot detection on Twitter have to face when using these databases from the literature.