Breakdown Time Analysis in The Effort to Maximize Medical Equipment Productivity in Hospital

Health equipment in hospitals determines the productivity of health service delivery. Medical equipment must continue to function properly. One way to measure the success of maintaining medical devices is by standard Breakdown Time. This study aims to determine the application of standard Breakdown Time on damaged medical devices. The research method used is a descriptive qualitative method with in-depth interviews. There are interviewees with private status and ASN (government employees). From the private sector, there are consultants, technical managers, and administrators of professional organizations in the field of medical equipment. Interviewees with ASN status are practitioners of maintenance and repair of health equipment in government hospitals. The results of the interviews were compiled into 6 groups based on the main questions asked, then analyses descriptively. The results of the study, Standard Breakdown Time have not been applied comprehensively in hospitals. Several informants informed that although there is an application of breakdown time, the standard is not yet clear and is only applied to high-tech equipment and/or for a minimal number of equipment there is only one in the hospital. For other equipment, there is no standard when the damage occurs, until when the damaged equipment must be able to function again. In conclusion, the Standard Breakdown Time for medical devices is important and its application must be supported by Ministerial-level regulations.

Functional, Physical and Rheological Properties of Composite Cassava-Wheat Flour Produced from Low Postharvest Physiological Deterioration Cassava (Manihot esculenta Crantz)

The functional, rheological and color (physical) properties of flours are quality attributes determining the usage, suitability and organoleptic characteristics of flours meant for industrial (baking and confectionery) application. This study investigated the functional, physical and rheological properties of composite cassava-wheat flour produced with low (PPD) cassava flours. Wholesome four varieties of yellow-fleshed Low PPD cassava and one variety of high PPD cassava were, washed, grated, pressed, pulverized, flash dried at 120 °C for 8 minutes, milled with cyclone hammer mill to which a screen having aperture size of 250 was affixed and subsequently cooled. The flours were subjected to analysis such as physical (color), functional and rheological. SPSS 25.0 was used to analyze pertinent data generated, significant means were separated applying Duncan multiple range test. The composite cassava-wheat (CCW) flours’ water absorption, swelling power, solubility index, oil absorption, bulk density, lightness (L*), redness (a*), and yellowness (b*) ranged from 13.53±0.05-13.73±0.05%, 7.00±0.01-8.87±0.03%, 8.27±0.01-9.55±0.06, 101.33±0.87-118.83±0.49%, 0.55±0.01-0.62±0.01 g/cm3, 93.95±0.28-96.01±0.34, 0.36±0.01-0.77±0.10 and 9.94±0.17-11.74±0.24, respectively. The water absorption, dough development time, dough stability, mixing tolerance index, dough consistency, farinograph quality number, breakdown time, water absorption for default moisture content and gluten content ranged from 60.70±0.00-63.70±0.14%, 1.28±0.00-1.32±0.00 min, 1.14±0.00-1.37±0.00 min, 75.00±0.00-104.00±0.00 BU, 424.00±0.00-518.00±0.00 mm, 23.00±0.00-26.00±0.00 mm, 2.10±0.00-2.38±0.00 min, 59.90±0.00-62.20±0.00% and 27.00±0.00-32.00±0.00, respectively. Comparable functional, rheological and physical properties to that of wheat flour was obtained from CCW flour prepared with blend of low PPD cassava flour and wheat which are suitable for application in the baking and confectionery industry.

Experimental Study of Plasma Plume Analysis of Long Pulse Laser Irradiates CFRP and GFRP Composite Materials

The application of laser fabrication of fiber-reinforced polymer (FRP) has an irreplaceable advantage. However, the effect of the plasma generated in laser fabrication on the damage process is rarely mentioned. In order to further study the law and mechanism of laser processing, the laser process was measured. CFRP and GFRP materials were damaged by a 1064 nm millisecond pulsed laser. Moreover, the propagation velocity and breakdown time of plasma plume were compared. The results show that GFRP is more vulnerable to breakdown than CFRP under the same conditions. In addition, the variation of plasma plume and material surface temperature with the number of pulses was also studied. The results show that the variation trend is correlated, that is, the singularities occur at the second pulse. Based on the analysis of experimental phenomena, this paper provides guidance for plasma phenomena in laser processing of composite materials.

Breakdown Phase in the GOLEM Tokamak and Its Impact on Plasma Performance

The effect of the breakdown phase on subsequent plasma parameters in GOLEM tokamak is investigated remotely. The dependence of the breakdown voltage and the breakdown time on the time delay between the switchings-on of a toroidal magnetic field Bt and a toroidal electric field Et for different groups of the pressure magnitudes is built. The performed experiments have shown that, for GOLEM tokamak, the shorter the temporal delay, the better are the mean plasma parameters. In addition, the breakdown phase is discussed in more details. In the discussion, the avalanche phase of the breakdown is analyzed. The dominant mechanism of particle losses during the avalanche phase, future steps, and tasks are discussed and set. The experiments on studying the breakdown phase have been carried out remotely on GOLEM tokamak by undergraduate students of V.N. Karazin Kharkiv National University.

Three-dimensional modeled environments versus 360 degree panoramas for mobile virtual reality training

Virtual field trip is a way of providing users with some knowledge and exposure of a facility without requiring them to physically visit the location. Due to the high computational costs that are necessary to produce virtual environments (VEs), the potential for photorealism is sacrificed. Often these three-dimensional (3D) modeled applications use an unrealistic VE and, therefore, do not provide a full depiction of real-world environments. Panoramas can be used to showcase complex scenarios that are difficult to model and are computationally expensive to view in virtual reality (VR). Utilizing 360° panoramas can provide a low-cost and quick-to-capture alternative with photorealistic representations of the actual environment. The advantages of photorealism over 3D models for training and education are not clearly defined. This paper initially summarizes the development of a VR training application and initial pilot study. Quantitative and qualitative study then was conducted to compare the effectiveness of a 360° panorama VR training application and a 3D modeled one. Switching to a mobile VR headset saves money, increases mobility, decreases set-up and breakdown time, and has less spatial requirements. Testing results of the 3D modeled VE group had an average normalized gain of 0.03 and the 360° panorama group, 0.43. Although the 3D modeled group had slightly higher realism according to the presence questionnaire and had slightly higher averages in the comparative analysis questionnaire, the 360° panorama application has shown to be the most effective for training and the quickest to develop.

Electrical Treeing and Partial Discharge Characteristics of Epoxy/Silica Nanocomposite under Alternating Current

The hydrophilic surface of fumed nanosilica was modified to a hydrophobic surface by treating it with a trimethyl silane coupling agent, and epoxy nanocomposites were prepared by mixing the modified nanosilica (0 phr, 1 phr, 3 phr, 5 phr, and 7 phr) in an epoxy matrix, where the unit phr means the parts per one hundred grams of epoxy base resin. To apply the nanocomposites to heavy electrical equipment, the effects of the modified nanosilica on the long-term treeing phenomena and the partial discharge (PD) resistance were studied under high voltage alternating current (HVAC) conditions. The bonding of trimethyl silane on the nanosilica surface was confirmed by the appearance of new peaks for the CH2 and CH3 groups in Fourier-transform infrared spectroscopy analysis. To observe the even dispersion of the modified nanosilica particles in the epoxy matrix, a transmission electron microscope was employed, and it was found that 1 phr of the modified nanosilica was uniformly dispersed; however, as the nanosilica content was increased, its aggregation became somewhat severe. The longest HVAC treeing breakdown time was found in an epoxy nanocomposite with 1 phr of alkyl-modified nanosilica, and the time was 17,412 min, which was 143.9 times longer than the 121 min required for a neat epoxy system. In a nanocomposite with 5 phr of modified nanosilica, PD resistance was found to be 12.5 times higher than that of the neat epoxy system.

A Translation into English of AL-FUZAI’s1 “Breakdown Time”2

Khalil I. Al-Fuzai (1940- ) is a Saudi writer who published few collections of stories. In these stories he manages to introduce his Arabian society in a simple, frank way (see Dohal 2013). One of these stories is “Breakdown Time.” I chose to translate this story for it is a good representation of what Al-Fuzai has written (Dohal, 2018 & 2019). In addition, it is about the Arabian culture; it tells how a man can propose for a woman’s hand.

A New Approach for Solving the Flow Shop Scheduling Problem Through Neural Network Technique With Known Breakdown Time and Weights of Jobs

This paper considers a flow shop scheduling problems of n jobs on m machines involving processing times and weights of jobs with the major constraint as breakdown times of the machines. In this paper a new procedure is provided to obtain an optimal job sequence with the objective of minimize the makespan and mean weighted flow time by using neural network technique. To illustrate the proposed method procedure, a numerical example is given. The effectiveness of the proposed method is compared with many problems which are taken from different papers. This paper also provides a comparison of our proposed method with the existing methods in literature.

A recommendation of breakdown maintenance on vehicle engine camshaft line using reliability centered maintenance and FMEA method

A vehicle engine manufacturing company that implements Total Productive Maintenance (TPM) found many breakdowns in the camshaft line from January to May 2019. This study aims to reduce the engine camshaft line breakdown by improving preventive maintenance using the Reliability Centered Maintenance (RCM) method and Failure Mode and Effect Analysis (FMEA). The researchers mapped the breakdown time data per engine and found that the longest breakdown time was on the IGR-0040 engine with 22.23 hours. The current availability ratio of the IGR-0040 machine is 72.88%, and the reliability index is 55%. Furthermore, this research identified machine failure using FMEA and found that six machine components experienced the highest failure rate. The researchers proposed some improvement activities related to the maintenance interval rescheduling period that could increase by 61% reliability