scholarly journals Identification of root cause based on simulation approach

Author(s):  
Anže Čelik ◽  
Matjaž Rupnik ◽  
Marko Žust

The paper shows and explains customer claim regarding improper functionality of hydraulic brake valve integrated into harvester machine. Further, the paper also presents simulation-based approach to understand and solve the issue. In the first step, fully detailed one-dimensional (1D) lumped model has been made in order to reproduce customer issue. Here, it is essentially to mention that (simplified) customer environment/machine was also part of detailed 1D numerical model – customer engagement in root-cause analysis is important. Thanks to detailed simulation model, deep understanding of the key parameters that affect the machine malfunction was possible in the second step. Model allows performing sensitivity study on key parameters with high fidelity. Lastly, based on detected key parameters, harvester brake valve has been updated/redesigned and sent to customer for final validation. Customer satisfaction along with short and effective response time of Poclain development team convert challenge situation to success.

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Yashuang Wang ◽  
Yan Ji

Abstract Background Student engagement can predict successful learning outcomes and academic development. The expansion of simulation-based medical and healthcare education creates challenges for educators, as they must help students engage in a simulation-based learning environment. This research provides a reference for facilitators of simulation teaching and student learning in medical and health-related majors by providing a deep understanding of student engagement in a simulation-based learning environment. Methods We conducted semi-structured interviews with ten medical and healthcare students to explore their learning types and characteristics in a simulation-based learning environment. Thematic analysis was used to analyse the data. Results The interviews were thematically analysed to identify three types of student engagement in the simulation-based learning environment: reflective engagement, performance engagement, and interactive engagement. The analysis also identified eight sub-themes: active, persistent, and focused thinking engagement; self-directed-learning thinking engagement with the purpose of problem solving; active “voice” in class; strong emotional experience and disclosure; demonstration of professional leadership; interaction with realistic learning situations; support from teammates; and collegial facilitator-student interaction. Conclusions The student interview and thematic analysis methods can be used to study the richness of student engagement in simulation-based learning environments. This study finds that student engagement in a simulation-based learning environment is different from that in a traditional environment, as it places greater emphasis on performance engagement, which combines both thinking and physical engagement, as well as on interactive engagement as generated through interpersonal interactions. Therefore, we suggest expanding the learning space centring around “inquiry”, as it can help strengthen reflective communication and dialogue. It also facilitates imagination, stimulates empathy, and builds an interprofessional learning community. In this way, medical and healthcare students can learn through the two-way transmission of information and cultivate and reshape interpersonal relationships to improve engagement in a simulation-based learning environment.


2019 ◽  
Vol 6 (3) ◽  
pp. 172-174
Author(s):  
Jemina Oremeyi Onimowo ◽  
Gary Knowles ◽  
Gemma Wrighton ◽  
Manisha Shah

For clinical simulation to be of maximum benefit, obtaining timely feedback from participants is vital in ensuring suitable improvements are made in the content and delivery of teaching in this setting. This report reviews the literature and describes the use of quick response (QR) codes instead of paper feedback forms following simulation-based learning sessions for fourth-year medical students. This newly implemented electronic method of collecting feedback has resulted in an increase in feedback response rate, reduction in administrative workload and a reduced carbon footprint. We also discuss other QR code-based innovations currently being implemented in this setting.


Author(s):  
Arun M. Puthanpurayil ◽  
Rajesh P Dhakal ◽  
Athol J. Carr

A consolidated review of the current-state-of-the-art on optimal damper positioning techniques is presented in this chapter. The inherent assumptions made in previous research are discussed and substantiated with numerical studies. Earlier studies have shown that optimal distribution of dampers is sensitive to in-structure damping. In this chapter the significance of optimal distribution of dampers coupled with the necessity for the use of a more realistic in-structure damping model is qualitatively illustrated using a comparative sensitivity study. The effect of inherent assumption of linearity of the parent frame on the ‘optimality’ is also investigated. It is shown that linearity assumption imposed on the parent frame in a major seismic event may not be justified; thereby raising doubts on the scope of optimality techniques proposed in literature.


2015 ◽  
Vol 4 (1) ◽  
pp. 1-30 ◽  
Author(s):  
Donna Lillian Namujju ◽  
Gönenç Yücel ◽  
Erik Pruyt ◽  
Richard Okou

Access to power is tied to a country's development. It facilitates improved social welfare, education, health and income generating opportunities. Uganda's economy is stifled by its low electrification rates - 16% nationally. This study builds a working theory on the internal setup of Uganda's power sector utilizing this theory to surface influential behavior modes as they pertain to power generation and supply and how these ultimately affect electricity access. Based on this working theory a System Dynamics simulation model is built. The model simulations show how Uganda's power sector is expected to evolve over 80 years in terms of power supply and demand given existing market structure and prevailing conditions. The study finds major problems in the nature of power accessed specifically an insufficient and unreliable power supply. The root cause is found in the nature of the existing capacity planning process in terms of how future capacity requirements are determined and the agreements made with generators as to how and when they fulfill their investment obligations.


2017 ◽  
Vol 2017 (1) ◽  
pp. 000172-000175
Author(s):  
Jeff Dekosky ◽  
Deepukumar Nair ◽  
Larry Carastro ◽  
Scott Knapp

Abstract This paper discusses an improved design flow for hybrid Multi-Chip Modules comprising of MMICs and other components. A full 3D electromagnetic co-simulation flow is proposed. Application of such a flow is demonstrated with an MCM receiver module which has a bulk acoustic wave pre-filter, a Low Noise Amplifier with a digital bypass function, and a classical 6th order filter implemented with discrete components. Detailed simulation data is provided on each component of the system and the final MCM module, that demonstrates the use of the design flow. Finally, simulation results are compared to measured data from fabricated modules to prove the validity of our design approach


2019 ◽  
Vol 29 (4) ◽  
pp. 119-122
Author(s):  
Matt Kaeberlein

Abstract Alzheimer’s disease is a growing threat to the economic and social well-being of developed countries around the globe, but efforts to delay, prevent, or cure this disorder have yet to yield success. I believe the lack of progress largely results from approaches that ignore the most important component of Alzheimer’s disease: biological aging. Major advances have been made in understanding the molecular mechanisms that link biological aging to disease. These mechanisms have been formalized as nine hallmarks, or pillars, of aging. Here, I discuss the barriers that have impaired progress and propose specific steps that can be taken to overcome these barriers. The time has come to adopt bold new strategies that tackle biological aging as the root cause of Alzheimer’s disease.


Author(s):  
Ignace D. Mendoume Minko ◽  
Marc Prevosto ◽  
Marc Le Boulluec

The so-called Linearize & Match (L&M), which gives a good approximation of the exact distribution of maxima roll angle of non-linear systems, was studied some years ago by Armand and Duthoit (1990) and by Prevosto (2001). The developments within this method were made in the case of single degree of freedom dynamic systems. Moreover, the terms (mass, damping, stiffness) of the non-linear transfer function did not depend on the circular frequency. In this paper, first, the L&M method is improved by adding a last step in the procedure which correct the Gaussian closure technique of the method, secondly is generalized to a coupled sway and roll dynamic system in which the hydrodynamic coefficients are frequency-dependent. The system is modelled by a set of ordinary differential equations in which the non linearity is only in the roll motion. In order to validate the results obtained in this case by the L&M method, a Monte Carlo method with long simulations of the response of the system was carried out. Hence, some aspects of the time domain simulation, based on Cummins equations, are also discussed.


1982 ◽  
Vol 12 (4) ◽  
pp. 659-666 ◽  
Author(s):  
Alan F. Chalmers

This article refutes the claim that the field of epidemiology and community health would benefit from the application of the scientific method. It is argued that the methods of physics are not appropriate for other disciplines. When applied to the social sciences, positivism is a conservatizing force, causing theory to become based on a mere description of social phenomenon. Since it cannot lead to a deep understanding of social phenomena, positivism is incapable of revealing ways in which society could be radically changed. Moreover, such theory is far from neutral. Rather, it is formed and influenced by the forms of life experienced and practiced in the society. This is illustrated by an analysis of the origin of modern physics at the time when society was changing from a feudal to capitalist form of organization. It is concluded that advances will be made in epidemiology and community health when this field breaks from its focus on the individual and incorporates class into its analysis. However, given the interconnection between social structure and social theory, resistance to such a radical change can be expected.


2019 ◽  
Vol 5 (1) ◽  
Author(s):  
Dyah Fitri Wulandari ◽  
Rr. Tutik Hariyati

 ABSTRAKDischarge planning merupakan suatu proses yang kompleks yang bertujuan untuk menyiapkan pasien dalam masa transisi di rumah sakit sampai pasien tersebut kembali ke rumahnya, dimana pelaksanannya harus dibuat sejak awal pasien datang ke pelayanan kesehatan. Pelaksanaan discharge planning  di rumah sakit dilakukan sebelum pasien pulang, atau sebelum pasien keluar dari unit layanan Pengamatan yang dilakukan penulis terhadap pelaksanaan discharge planning di ruang ICU, perawat lebih mengutamakan memperhatikan kondisi kritis pasien, sehingga melupakan pelaksanaan discharge planning.  Tujuan tulisan ini adalah melakukan analisis terhadap pelaksanaan discharge planning  di ruang ICU RS X Jakarta. Metode yang digunakan adalah metode analisis dengan menggunakan fishbone dengan asesmen yang dilakukan berupa observasi, wawancara dan pengumpulan data sekunder yang sudah ada di RS X Jakarta, setelah itu dilakukan pencarian literatur untuk  mengidentifikasi akar masalahnya, sehingga bisa diusulkan rekomendasi untuk penyelesaian terhadap masalah tersebut. Dari hasil analisis ditemukan akar masalah yaitu pengetahuan perawat yang kurang tentang discharge planning dan  kurang optimalnya sistem yang mendukung pelaksanaan discharge planning seperti format, SPO dan panduan. Rekomendasi yang di usulkan yaitu berupa perbaikan format discharge planning, revisi SPO, pembuatan panduan dan pelaksanaan pelatihan discharge planning.ABSTRACTDischarge planning is a complex process that aims to prepare patients in the transition period in the hospital until the patient returns to his home, where the implementation must be made from the beginning the patient comes to the health service. However, discharge planning was done before the patient returns, or before the patient left the service unit in Hospital. In the ICU room with critical patient conditions, nurses prioritize paying attention to the critical condition of the patient, thus forgetting the implementation of this discharge planning. For this reason, this paper aimed to analyze the implementation of discharge planning in the ICU of Jakarta X Hospital, literature study to identify the root of the problem, so that recommendations can be proposed to resolve the problem. The method was used an analysis using fishbone diagram with an assessment conducted in the observation form. Interview and secondary data collection from Jakarta X Hospital. Based on the analysis results, the root cause of the problem is knowledge of nurses who are less about discharge planning and less optimal systems that support the implementation of discharge planning such as format, SPO and guidelines. For this reason, recommendations for improvements were made in the form of redesigning the format of discharge planning, revision of SPO, making guidelines and implementing discharge planning training


2021 ◽  
Vol 5 (1) ◽  
pp. 68
Author(s):  
Lina Aulia

PT PLB (pseudonym) is a company that produces household appliances and kitchen utensils. The country kettle is one type of product made by PT PLB. The productivity of the country kettle production line decreased by 56%. This was due to defective products. The largest percentage of defects in-country kettle products occurred in the spinning process of 40.18%. This study aimed to identify the causes of defects in-country kettle products and how to overcome them by designing improvement proposals. Lean manufacturing principles were used to evaluate the problems that occur. There were three types of lean manufacturing tools used in this study: Value Stream Mapping (VSM) and 5Ways. VSM was used to describe and identify value-added activities, non-value-added activities but necessary, and non-value-added activities so that the production process becomes lean. The root cause analysis was performed using the 5 Whys method. Unskilled workers and non-standard material types between suppliers are the highest contributors to defects in the spinning process. Based on this, this research was focused on improvements made in the spinning process. Proposals for improvements to the causes of the problems found are standardization of work procedures, standardization of supplier specifications, and arrangement of semi-finished goods and/or supplies. Based on the company's results, the proposed standardization of work procedures and arrangement of semi-finished goods and/or supplies may be implemented in the company. Meanwhile, the proposal for selecting suppliers is not feasible due to company limitations


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