Acceptance condition for toothform- and toothtrace accuracy of cylindrical involute gears and its effect on power transmitting characteristics. (2nd report. Difference between intended and actual performance of gears).

This study aimed to analyze the customer experience seen from the level of actual performance and the level of importance of services provided by internet service providers PT. XYZ in Makassar City. Variables and attributes issued by TM Forum GB 912 consisting of Customer Management, Fulfillment, Assurance, and Billing, are used to analyze the performance provided by customer service in the field. The analysis technique will be carried out using the Importance Performance Analysis and Customer Satisfaction Index consisting of quadrant analysis and gap analysis used to investigate customer satisfaction and identify variables whose performance is deemed to need improvement. Data were collected using a platform-based questionnaire application from 100 respondents selected using random sampling techniques. The results showed that customers were satisfied with the performance and quality of services provided. The customer satisfaction index value obtained by CSI analysis shows a value of 82.006%. In conclusion, that the Fulfillment variable is a service variable that is considered the most important customer and requires improvement because its performance is still relatively low. While the variables considered good and need to be maintained are the Billing variable. Other service variables are sorted based on priority of improvement in a row, namely Fulfillment, Customer Management, and Assurance.

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Faculty Opinions recommendation of Evidence-based medicine: discrepancy between perceived competence and actual performance among graduating medical students.

Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature ◽

10.3410/f.14577.472082 ◽

2006 ◽

Author(s):

Deborah R Korenstein

Keyword(s):

Medical Students ◽

Evidence Based Medicine ◽

Perceived Competence ◽

Evidence Based ◽

Actual Performance ◽

Based Medicine

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Performansi aktual modul photovoltaik dengan pengarah matahari

Jurnal Teknik Mesin Indonesia ◽

10.36289/jtmi.v12i2.80 ◽

2018 ◽

Vol 12 (2) ◽

pp. 98 ◽

Cited By ~ 1

Author(s):

Jalaluddin . ◽

Baharuddin Mire

Keyword(s):

Solar Radiation ◽

Local Time ◽

Performance Characteristic ◽

Electrical Energy ◽

Photovoltaic Module ◽

Experiment Data ◽

Actual Performance ◽

Pv Module ◽

Solar Tracking ◽

Pv Modules

Actual performance of photovoltaic module with solar tracking is presented. Solar radiation can be converted into electrical energy using photovoltaic (PV) modules. Performance of polycristalline silicon PV modules with and without solar tracking are investigated experimentally. The PV module with dimension 698 x 518 x 25 mm has maximum power and voltage is 45 Watt and 18 Volt respectively. Based on the experiment data, it is concluded that the performance of PV module with solar tracking increases in the morning and afternoon compared with that of fixed PV module. It increases about 18 % in the morning from 10:00 to 12:00 and in the afternoon from 13:30 to 14:00 (local time). This study also shows the daily performance characteristic of the two PV modules. Using PV module with solar tracking provides a better performance than fixed PV module.

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Second-Law Analysis in a Steam Power Plant for Minimization of Avoidable Exergy Destruction

ASME 2010 4th International Conference on Energy Sustainability, Volume 1 ◽

10.1115/es2010-90144 ◽

2010 ◽

Cited By ~ 3

Author(s):

Tapan K. Ray ◽

Pankaj Ekbote ◽

Ranjan Ganguly ◽

Amitava Gupta

Keyword(s):

Work Performance ◽

Operating Conditions ◽

Performance Criteria ◽

Second Law ◽

Feed Water ◽

Exergy Destruction ◽

Actual Performance ◽

Time Operation ◽

Major Equipment ◽

Cycle Efficiency

Performance analysis of a 500 MWe steam turbine cycle is performed combining the thermodynamic first and second-law constraints to identify the potential avenues for significant enhancement in efficiency. The efficiency of certain plant components, e.g. condenser, feed water heaters etc., is not readily defined in the gamut of the first law, since their output do not involve any thermodynamic work. Performance criteria for such components are defined in a way which can easily be translated to the overall influence of the cycle input and output, and can be used to assess performances under different operating conditions. A performance calculation software has been developed that computes the energy and exergy flows using thermodynamic property values with the real time operation parameters at the terminal points of each system/equipment and evaluates the relevant rational performance parameters for them. Exergy-based analysis of the turbine cycle under different strategic conditions with different degrees of superheat and reheat sprays exhibit the extent of performance deterioration of the major equipment and its impact to the overall cycle efficiency. For example, during a unit operation with attemperation flow, a traditional energy analysis alone would wrongly indicate an improved thermal performance of HP heater 5, since the feed water temperature rise across it increases. However, the actual performance degradation is reflected as an exergy analysis indicates an increased exergy destruction within the HP heater 5 under reheat spray. These results corroborate to the deterioration of overall cycle efficiency and rightly assist operational optimization. The exergy-based analysis is found to offer a more direct tool for evaluating the commercial implication of the off-design operation of an individual component of a turbine cycle. The exergy destruction is also translated in terms of its environmental impact, since the irretrievable loss of useful work eventually leads to thermal pollution. The technique can be effectively used by practicing engineers in order to improve efficiency by reducing the avoidable exergy destruction, directly assisting the saving of energy resources and decreasing environmental pollution.

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Accuracy of emergency physicians’ self-estimates of CT scan utilization and its potential effect on an audit and feedback intervention: a randomized trial

Implementation Science Communications ◽

10.1186/s43058-021-00182-1 ◽

2021 ◽

Vol 2 (1) ◽

Author(s):

Celine Larkin ◽

Alexandra M. Sanseverino ◽

James Joseph ◽

Lauren Eisenhauer ◽

Martin A. Reznek

Keyword(s):

Randomized Trial ◽

Repeated Measures ◽

Intervention Group ◽

Potential Effect ◽

Audit And Feedback ◽

Emergency Physicians ◽

Feedback Intervention ◽

Experimental Conditions ◽

Actual Performance ◽

Ct Utilization

Abstract Background Audit and feedback (A&F) has been used as a strategy to modify clinician behavior with moderate success. Although A&F is theorized to work by improving the accuracy of clinicians’ estimates of their own behavior, few interventions have included assessment of clinicians’ estimates at baseline to examine whether they account for intervention success or failure. We tested an A&F intervention to reduce computed tomography (CT) ordering by emergency physicians, while also examining the physicians’ baseline estimates of their own behavior compared to peers. Methods Our study was a prospective, multi-site, 20-month, randomized trial to examine the effect of an A&F intervention on CT ordering rates, overall and by test subtype. From the electronic health record, we obtained 12 months of baseline CT ordering per 100 patients treated for every physician from four emergency departments. Those who were randomized to receive A&F were shown a de-identified graph of the group’s baseline CT utilization, asked to estimate wherein the distribution of their own CT order practices fell, and then shown their actual performance. All participants also received a brief educational intervention. CT ordering rates were collected for all physicians for 6 months after the intervention. Pre-post ordering rates were compared using independent and repeated measures t tests. Results Fifty-one of 52 eligible physicians participated. The mean CT ordering rate increased significantly in both experimental conditions after the intervention (intervention pre = 35.7, post = 40.3, t = 4.13, p < 0.001; control pre = 33.9, post = 38.9, t = 3.94, p = 0.001), with no significant between-group difference observed at follow-up (t = 0.43, p = 0.67). Within the intervention group, physicians had poor accuracy in estimating their own ordering behavior at baseline: most overestimated and all guessed that they were in the upper half of the distribution of their peers. CT ordering increased regardless of self-estimate accuracy. Conclusions Our A&F intervention failed to reduce physician CT ordering: our feedback to the physicians showed most of them that they had overestimated their CT ordering behavior, and they were therefore unlikely to reduce it as a result. After “audit,” it may be prudent to assess baseline clinician awareness of behavior before moving toward a feedback intervention.

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Energy-Constrained Design of Joint NOMA-Diversity Schemes with Imperfect Interference Cancellation

Sensors ◽

10.3390/s21124194 ◽

2021 ◽

Vol 21 (12) ◽

pp. 4194

Author(s):

Fulvio Babich ◽

Giulia Buttazzoni ◽

Francesca Vatta ◽

Massimiliano Comisso

Keyword(s):

Interference Cancellation ◽

Energy Levels ◽

Random Access ◽

Actual Performance ◽

Available Energy ◽

Fifth Generation ◽

Code Modulation ◽

Energy Constrained ◽

The Relationship ◽

The Internet Of Things

This study proposes a set of novel random access protocols combining Packet Repetition (PR) schemes, such as Contention Resolution Diversity Slotted Aloha (CRDSA) and Irregular Repetition SA (IRSA), with Non Orthogonal Multiple Access (NOMA). Differently from previous NOMA/CRDSA and NOMA/IRSA proposals, this work analytically derives the energy levels considering two realistic elements: the residual interference due to imperfect Interference Cancellation (IC), and the presence of requirements on the power spent for the transmission. More precisely, the energy-limited scenario is based on the relationship between the average available energy and the selected code modulation pair, thus being of specific interest for the implementation of the Internet of Things (IoT) technology in forthcoming fifth-generation (5G) systems. Moreover, a theoretical model based on the density evolution method is developed and numerically validated by extensive simulations to evaluate the limiting throughput and to explore the actual performance of different NOMA/PR schemes in energy-constrained scenarios.

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Importance-Performance Analysis of Health Perception among Korean Adolescents during the COVID-19 Pandemic

International Journal of Environmental Research and Public Health ◽

10.3390/ijerph18031280 ◽

2021 ◽

Vol 18 (3) ◽

pp. 1280

Author(s):

Seung-Man Lee ◽

Wi-Young So ◽

Hyun-Su Youn

Keyword(s):

Mental Health ◽

Physical Activity ◽

Performance Analysis ◽

Health Perception ◽

Good Work ◽

Online Questionnaire ◽

Actual Performance ◽

Korean Adolescents ◽

Control Dimension ◽

And Performance

This study assessed the health perceptions of 333 Korean adolescents during the coronavirus disease (COVID-19) pandemic via an online questionnaire administered in October 2020, which queried the perceived importance and actual performance of health behaviors. The health perception scales used in the survey consists of the six dimensions of mental health, disease, physical activity, sleep, diet, and sanitary health. The data were primarily analyzed using paired sample t-test for analysis of difference and importance-performance analysis (IPA). The IPA results were presented in four quadrants—“keep up the good work,” “concentrate here,” “low priority,” and “possible overkill.” The results indicated that first, there was a positive relationship between the importance and performance of all the subdimensions of health perception. Second, sanitary healthcare was rated as being of the greatest importance and was performed most, while physical activity management was rated least important and performed least. Third, statistically significant differences were found between importance and performance for all items of mental health, disease, physical activity, sleep, and diet dimensions, and some differences were found for items assessing the hygiene control dimension. Fourth, in the two-dimensional IPA model, “sanitary health” and “disease” are in Quadrant I (keep up the good work); “mental health,” in Quadrant II (concentrate here); and “physical activity,” “sleep,” and “diet,” in Quadrant III (low priority). No components of healthcare were in Quadrant IV (possible overkill). Based on these results, we emphasize the importance of adolescent health education and discuss solutions to enhance the performance of healthcare activities.

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Shear cutting induced residual stresses in involute gears and resulting tooth root bending strength of a fineblanked gear

Archive of Applied Mechanics ◽

10.1007/s00419-021-01915-3 ◽

2021 ◽

Author(s):

Daniel Müller ◽

Jens Stahl ◽

Anian Nürnberger ◽

Roland Golle ◽

Thomas Tobie ◽

...

Keyword(s):

Surface Roughness ◽

Residual Stresses ◽

Carrying Capacity ◽

Bending Strength ◽

Tooth Root ◽

Load Carrying Capacity ◽

Near Surface ◽

Load Carrying ◽

Involute Gears ◽

Cut Surface

AbstractThe manufacturing of case-hardened gears usually consists of several complex and expensive steps to ensure high load carrying capacity. The load carrying capacity for the main fatigue failure modes pitting and tooth root breakage can be increased significantly by increasing the near surface compressive residual stresses. In earlier publications, different shear cutting techniques, the near-net-shape-blanking processes (NNSBP’s), were investigated regarding a favorable residual stress state. The influence of the process parameters on the amount of clean cut, surface roughness, hardness and residual stresses was investigated. Furthermore, fatigue bending tests were carried out using C-shaped specimens. This paper reports about involute gears that are manufactured by fineblanking. This NNSBP was identified as suitable based on the previous research, because it led to a high amount of clean cut and favorable residual stresses. For the fineblanked gears of S355MC (1.0976), the die edge radii were varied and the effects on the cut surface geometry, hardness distribution, surface roughness and residual stresses are investigated. The accuracy of blanking the gear geometry is measured, and the tooth root bending strength is determined in a pulsating test rig according to standardized testing methods. It is shown that it is possible to manufacture gears by fineblanking with a high precision comparable to gear hobbing. Additionally, the cut surface properties lead to an increased tooth root bending strength.

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