Multi-Criteria Decision Approach to Design a Vacuum Infusion Process Layout Providing the Polymeric Composite Part Quality

The increasingly widespread use of vacuum assisted technologies in the manufacture of polymer-composite structures does not always provide the required product quality and repeatability. Deterioration of quality most often appears itself in the form of incomplete filling of the preform with resin as a result of the inner and outer dry spot formation, as well as due to premature gelation of the resin and blockage of the vacuum port. As experience shows, these undesirable phenomena are significantly dependent on the location of the resin and vacuum ports. This article presents a method for making a decision on the rational design of a process layout. It is based on early forecasting of its objectives in terms of quality and reliability when simulating its finite element model, on the correlation analysis of the preliminary and final quality assessments, as well as on the study of the cross-correlation of a group of early calculated sub-criteria. The effectiveness of the proposed method is demonstrated by the example of vacuum infusion of a 3D thin-walled structure of complex geometry.

Study of Incompleteness Medical Records of Inpatient in Appendicitis Cases at Dr. Reksodiwiryo Hospital Padang

Background: Incomplete filling of medical record files for inpatients at Dr. Reksodiwiryo hospital medical records will be describe health services and the quality of medical record services. Medical record quality services include the completeness of medical record files, accuracy in providing diagnosis and diagnosis codes, as well as speed in providing service information. The requirements for quality medical records must be accurate, complete, reliable, valid, timely, usable, common, comparable, guaranteed, and easy.Methods: This research method is a descriptive with a retrospective approach or looking at existing data. This study was carried out in September 2021. The population was 70 files cases of inpatient digestive surgery. Samples were taken from 27 files of inpatients with appendicitis cases.Results: From the research that has been done, the highest percentage of incomplete identification components is found on the gender item about 81.48%, the highest percentage of incomplete important report components is obtained on the medical resume and informed consent items about 11.1%. The highest percentage of incomplete authentication components was obtained in the nursing degree about 96.3%. The highest percentage of the components of the recording method was obtained by 59.3%, there are several blank sections about 16 files. The percentage of incomplete diagnostic codes and procedures is 100% Conclusions: the researcher suggested that the hospital can have an Operational Standart on filling out the completeness of medical records files

Analytical and numerical analyses of filling progression and void formation in flip-chip underfill encapsulation process

Purpose This paper aims to study the filling progression of underfill flow and void formation during the flip-chip encapsulation process. Design/methodology/approach A new parameter of filling progression that relates volume fraction filled to filling displacement was formulated analytically. Another indicative parameter of filling efficiency was also introduced to quantify the voiding fraction in filling progression. Additionally, the underfill process on different flip-chips based on the past experiments was numerically simulated. Findings All findings were well-validated with reference to the past experimental results, in terms of quantitative filling progression and qualitative flow profiles. The volume fraction filled increases monotonically with the filling displacement and thus the filling time. As the underfill fluid advances, the size of the void decreases while the filling efficiency increases. Furthermore, the void formed during the underfilling flow stage was caused by the accelerated contact line jump at the bump entrance. Practical implications The filling progression enabled manufacturers to forecast the underfill flow front, as it advances through the flip-chip. Moreover, filling progression and filling efficiency could provide quantitative insights for the determination of void formations at any filling stages. The voiding formation mechanism enables the prompt formulation of countermeasures. Originality/value Both the filling progression and filling efficiency are new indicative parameters in quantifying the performance of the filling process while considering the reliability defects such as incomplete filling and voiding.

The Incomplete Filling in The Medical Resume Form of Inpatients at The Regional General Hospital

Preliminary: A medical resume is a summary of medical service activities provided by health workers, especially doctors during the treatment period until the patient is discharged either in good health or in death. Incomplete filling of medical resumes can be caused by negligence of officers or lack of understanding of the importance of completing patient data. This research is a descriptive research with a qualitative approach. In this study there were 4 medical recorder and 50 medical resume form. Method: The sampling technique used is the total sample. The data analysis used is descriptive data analysis. Results: Based on the results of the study, the incomplete medical resume form for inpatients in 2021 with a sample of 50 medical resume forms, the average percentage of medical resume completeness was 66.7%, while the incomplete medical resume was 33.3% of the 50 samples of medical resume forms. The highest percentage of incompleteness is the doctor's signature (52%). And the highest percentage of completeness is no medical record (76%). The problem that usually arises is that there are still many incomplete components of a medical resume. Conclusion: to overcome the problem usually requires more optimal socialization and collaboration between doctors and medical recorders, to further improve health services regarding the completeness of filling out medical record documents in order to improve the quality of health services, and the head of medical records needs to hold meetings or directives to the unit concerned so that the resume is filled out. can be carried out properly. Keywords: Incompleteness; inpatien; Medical Resume.

Ways to Improve Wear Resistance and Damping Properties of Radial Bearings Taking into Account Inertial Forces

This article considers a radial sliding bearing of infinite length whose moving part consists of the support, the porous layer, and the liquid lubricant. The analysis of the existing design calculation methods for such sliding bearings shows that they are very approximate because they do not consider the inertial forces applied, the electric conductivity of the lubricant, the permeability anisotropy, as well as the impacts of the electric field vector, magnetic induction vector, and incomplete filling of the working gap (pre-accident condition). The authors demonstrate how these factors impact the stable operation of the device facilitating the hydrodynamic regime. The authors find the asymptotic solution for the zero, first, and second approximation taking into account the inertial forces for the “thin layer”. By solving the produced equations using the Gauss-Seidel method, the authors determine the key operating parameters of the friction couple in question: the carrying capacity and the friction force. The authors provide an impact assessment for the parameters characterizing the permeability of the porous coating, the electric conductivity, and viscosity of the lubricant, as well as the length of the loaded area and the impacts of inertial forces on the carrying capacity and the friction force.

Computational model of a micropolar lubricant with a non-standard support profile and a metal coating at incomplete filling of the working gap

The authors propose an asymptotic and exact self-similar solution for zero (without considering the melt) and the first (considering the melt) approximation of a wedge-shaped sliding support with a profile adapted to friction and a fusible metal coating of the guide surface. The solution is based on the equation of a micropolar liquid flow for a “thin layer”, the continuity equation, as well as the equation describing the profile of the molten contour of a guide coated with a fusible metal alloy. The authors have taken into account the formula of the rate of mechanical energy dissipation as well as rheological properties of the lubricant and the melt, which have micropolar properties in the laminar flow mode at incomplete filling of the working gap. Analytical dependences have been obtained for the profile of the molten surface of the guide coated with a low-melting metal alloy, as well as for the velocity and pressure fields at zero and first approximation. In addition, the main operating characteristics of the friction pair under consideration have been determined: the bearing capacity and the friction force. The article contains estimation of the influence of the parameters conditioned by coating melt and adapted to the friction conditions of the support profile, and the parameter characterizing the rheological properties of the lubricant, as well as the length of the loaded area in terms of bearing capacity and friction force.

Mathematical model of a ferromagnetic lubricant in the presence of a porous coating in the bearing structure

Based on the flow equation of a ferromagnetic liquid lubricant for a “thin layer”, the continuity equation and Darcy’s equation describing the flow of a lubricant in a porous body, an exact self-similar solution of wedge-shaped sliding support with a porous coating of the surface of the support ring is found, taking into account the dependence of the viscosity of the ferromagnetic lubricant and the permeability of the porous coating with the incomplete filling of the working gap. Analytical dependencies for the velocity and pressure fields in the lubricating and porous layer are obtained. Also, the main operating characteristics are determined load-bearing capacity and friction force. The numerical analysis of the theoretical results showed that the bearing capacity of the bearings can be increased by 8-12% in the range of the studied load-speed modes. At the same time, the coefficient of friction is reduced by 14-16%. To verify and confirm the effectiveness of the obtained theoretical models, an experimental study of a modified wedge-shaped sliding support on TP-22C, MS-20 oil and their mixture with various additives was carried out. As a result of theoretical and experimental studies, tribotechnical characteristics were determined that allow us to judge the presence of a long-term friction mode.

Assessment of laboratory test request forms for completeness

Background: Laboratory test request forms usually accompany patient’s samples to the laboratory, providing biodata and clinical details of the patient. This information is for purposes of identification and guiding pathologists to accurately interpret patient’s result. Clinicians however do not usually provide all the required information, thus making interpretation difficult. The frequency of such incompleteness is assessed in this study.Methods: Laboratory request forms received at the Chemical Pathology laboratory between July and September 2020 were assessed for completeness of all the required parameters. Parameters analyzed in this study included age, gender, hospital number, location, clinical information, name of requesting physician and the date of request. Frequency of missing parameters were expressed as proportions (%) of the total omissions.Results: There were 1906 request forms received during the course of this study and 789 (41.4%) of them had at least one missing parameter. Apart from patients’ names, nature of sample and the requested investigation, all other parameters were omitted at one time or the other making a total of 1117 omissions. Age (287; 25.7%) hospital number (264; 23.6%) and clinical information (246; 22%) were the most commonly omitted parameters. Majority of the omissions (69%) were from the outpatient clinics, 20% were from the wards while 10% of the forms had no ward or clinic indicated.Conclusion: Incomplete filling of laboratory test request forms is a regular occurrence among clinicians. Effort must be made to continually sensitize them of the importance of each of the required parameters to ensure a visible improvement.

Influence of Laser Soldering Temperatures On Thru-Hole Component

The conventional method of selective soldering has been practiced using wave soldering, convection reflow, and hand soldering. However, due to industry automation and high demand for quality, repeatability and flexibility, laser soldering process has been developed to meet these demands. This paper investigates the effect of different temperature of laser soldering process on lead free solder (SAC305) by means of numerical method that is validated by experiment. Finite Volume Method (FVM) was used for the three-dimensional (3D) simulation to simulate the filling flow of the lead-free solder. Experiments were carried out to complement simulation validity and the results of far both methods have reached a good agreement. The findings show that a better result can be achieved when angle of lead component (?le) approaches 90°. Using the optimized lead angle, five different temperature simulations were set in the range of 550K < T < 700K. The finding shows that, 600K has the best velocity and pressure distributions with average values of 63.3 mm/s and 101.1386kPa, respectively. The high-pressure region is concentrated at the top and bottom surface of solder pad. High difference in pressure and velocity spots somehow lead to issue associated with possibility of incomplete filling or void formation. 650K model shows less void formation since it produces high pressure filling flow within the solder region.