Feasibility evaluation of using additive technologies in aerospace products

2021 ◽  
Author(s):  
E.S. Shemonaeva ◽  
A.V. Goncharov ◽  
V.D. Andreev
Keyword(s):  
Dynamic Strength ◽  
Additive Technologies ◽  
Topological Optimization ◽  
Software Systems ◽  
Production Program ◽  
Metal Printing ◽  
Feasibility Evaluation ◽  
Processing Modes ◽  
Cost Of Materials ◽  
The Cost

The paper studies the feasibility of using additive technologies in the manufacture of parts of complex shapes for aerospace products. The results of the structural analysis of a part helped find the directions of topological optimization and optimize the part’s design. To confirm the relevance of the design optimization, we carried out static and dynamic strength calculations in the Siemens NX software package. The paper considers technologies for manufacturing the part by 3D metal printing and traditional milling on a numerically controlled machine. In order to obtain initial data for economic calculations, we simulated manufacturing processes in various software systems. To study the feasibility of metal printing technology, we carried out its technical and economic analysis, and found that the production program, technological processing modes and the cost of materials affect the cost of the product.

scholarly journals Direct cost of connecting, maintaining and disconnecting patient-controlled analgesia pump

2014 ◽  
Vol 48 (1) ◽  
pp. 104-109 ◽  
Author(s):  
Áquila Lopes Gouvêa ◽  
Antônio Fernandes Costa Lima
Keyword(s):  
Quantitative Research ◽  
Unit Cost ◽  
Patient Controlled Analgesia ◽  
Unified Health System ◽  
Effective Decision ◽  
The Mean ◽  
Effective Decision Making ◽  
Cost Of Materials ◽  
The Cost ◽  
Probabilistic Sample

Quantitative research that aimed to identify the mean total cost (MTC) of connecting, maintaining and disconnecting patient-controlled analgesia pump (PCA) in the management of pain. The non-probabilistic sample corresponded to the observation of 81 procedures in 17 units of the Central Institute of the Clinics Hospital, Faculty of Medicine, University of Sao Paulo. We calculated the MTC multiplying by the time spent by nurses at a unit cost of direct labor, adding the cost of materials and medications/solutions. The MTC of connecting was R$ 107.91; maintenance R$ 110.55 and disconnecting R$ 4.94. The results found will subsidize discussions about the need to transfer money from the Unified Health System to hospitals units that perform this technique of analgesic therapy and it will contribute to the cost management aimed at making efficient and effective decision-making in the allocation of available resources.

A Novel Effort Measure Method for Effort-Aware Just-in-Time Software Defect Prediction

2021 ◽  
Vol 31 (08) ◽  
pp. 1145-1169
Author(s):  
Liqiong Chen ◽  
Shilong Song ◽  
Can Wang
Keyword(s):  
Prediction Model ◽  
Defect Prediction ◽  
Software Systems ◽  
Support Vector ◽  
Just In Time ◽  
Software Defect Prediction ◽  
Fine Grained ◽  
Software Defect ◽  
Code Changes ◽  
The Cost

Just-in-time software defect prediction (JIT-SDP) is a fine-grained software defect prediction technology, which aims to identify the defective code changes in software systems. Effort-aware software defect prediction is a software defect prediction technology that takes into consideration the cost of code inspection, which can find more defective code changes in limited test resources. The traditional effort-aware defect prediction model mainly measures the effort based on the number of lines of code (LOC) and rarely considers additional factors. This paper proposes a novel effort measure method called Multi-Metric Joint Calculation (MMJC). When measuring the effort, MMJC takes into account not only LOC, but also the distribution of modified code across different files (Entropy), the number of developers that changed the files (NDEV) and the developer experience (EXP). In the simulation experiment, MMJC is combined with Linear Regression, Decision Tree, Random Forest, LightGBM, Support Vector Machine and Neural Network, respectively, to build the software defect prediction model. Several comparative experiments are conducted between the models based on MMJC and baseline models. The results show that indicators ACC and [Formula: see text] of the models based on MMJC are improved by 35.3% and 15.9% on average in the three verification scenarios, respectively, compared with the baseline models.

scholarly journals Direct Cost of Reprocessing Cotton-woven Surgical Drapes: a Case Study

2015 ◽  
Vol 49 (3) ◽  
pp. 488-494 ◽  
Author(s):  
Mariana Fexina Tomé ◽  
Antônio Fernandes Costa Lima
Keyword(s):  
Human Resources ◽  
Direct Cost ◽  
Financial Resources ◽  
Average Total Cost ◽  
Descriptive Case Study ◽  
Total Cost ◽  
Advantages And Disadvantages ◽  
Cost Of Materials ◽  
The Cost

OBJECTIVE Identify the direct cost of reprocessing double and single cotton-woven drapes of the surgical LAP package. METHOD A quantitative, exploratory and descriptive case study, performed at a teaching hospital. The direct cost of reprocessing cotton-woven surgical drapes was calculated by multiplying the time spent by professionals involved in reprocessing the unit with the direct cost of labor, adding to the cost of materials. The Brazilian currency (R$) originally used for the calculations was converted to US currency at the rate of US$0.42/R$. RESULTS The average total cost for surgical LAP package was US$9.72, with the predominance being in the cost of materials (US$8.70 or 89.65%). It is noteworthy that the average total cost of materials was mostly impacted by the cost of the cotton-woven drapes (US$7.99 or 91.90%). CONCLUSION The knowledge gained will subsidize discussions about replacing reusable cotton-woven surgical drapes for disposable ones, favoring arguments regarding the advantages and disadvantages of this possibility considering human resources, materials, as well as structural, environmental and financial resources.

scholarly journals Procedures’ costs related to outpatient chemotherapy treatment of women suffering from breast cancer

2014 ◽  
Vol 48 (4) ◽  
pp. 699-705 ◽  
Author(s):  
Caroline Rife Nobrega ◽  
Antônio Fernandes Costa Lima
Keyword(s):  
Breast Cancer ◽  
Quantitative Research ◽  
Unit Cost ◽  
Chemotherapy Treatment ◽  
Case Study Methodology ◽  
Total Cost ◽  
Outpatient Chemotherapy ◽  
Therapeutic Procedures ◽  
Cost Of Materials ◽  
The Cost

To identify the direct cost of procedures related to an outpatient chemotherapy treatment for women with breast cancer. Method: This is a quantitative research, using the case study methodology, performed in an outpatient chemotherapy of a private hospital. The total cost was calculated by multiplying the time spent by professionals involved in therapeutic procedures, the unit cost of direct labor, adding to the cost of materials, drugs and solutions. For performing the calculations, we used the Brazilian currency (R$). Results: The average total cost per chemotherapy session corresponded to R$ 1,783.01 (100%), being R$ 1,671.66 (93,75%) spent with drugs, R$ 74,98 (4.21%) with materials, R$ 28.49 (1.60%) with labor and R$ 7.88 (0.44%) with solutions. Conclusion: The results may support discussions and decision making for the management of costs related to chemotherapy aimed at reducing expenses and eliminating waste without harm to the care provided. 


scholarly journals Software Tools for Engineering Dark Skies

1991 ◽  
Vol 112 ◽  
pp. 71-76
Author(s):  
A. M. Smith ◽  
D. L. Dilaura
Keyword(s):  
Applied Mathematics ◽  
Computer Software ◽  
Principal Component ◽  
Software Systems ◽  
Atmospheric Scattering ◽  
Recent Developments ◽  
Proper Design ◽  
Lighting Systems ◽  
The Cost ◽  
Optical Astronomy

ABSTRACTAtmospheric scattering of outdoor nighttime electric illumination produces the principal component of background sky luminance that seriously affects ground-based optical astronomy. The sources for this scattering are Tight emitted skyward directly from luminaires, and light reflected off the ground and other illuminated objects. Careful illumination engineering can thus significantly reduce background sky luminance in two ways: 1) by providing outdoor electric lighting equipment that controls the directions in which light is emitted, and; 2) by proper design of outdoor lighting systems which make efficient use of the east amount of light. Recent developments in applied mathematics and computer software have produced computational tools that are being used to design lighting equipment and lighting systems. The software system for luminaire design significantly reduces the cost of this process by eliminating the need for extensive prototyping and provides for inexpensive experimentation with new designs. The system for outdoor lighting calculations permits the design of highly controlled lighting systems that eliminate glare and upward directed light while providing light appropriate for the visual task. These two software systems are described, along with examples of their use in areas that directly affect astronomical observations.

scholarly journals Direct cost of peripheral catheterization by nurses

2019 ◽  
Vol 72 (1) ◽  
pp. 88-94
Author(s):  
Ana Beatriz Mateus Pires ◽  
Antônio Fernandes Costa Lima
Keyword(s):  
Direct Cost ◽  
Neonatal Intensive Care ◽  
Participant Observation ◽  
Single Case ◽  
Unit Cost ◽  
Peripherally Inserted Central Catheter ◽  
Central Catheter ◽  
Cost Of Materials ◽  
The Cost ◽  
Nursing Professionals

ABSTRACT Objective: To measure the average direct cost of peripherally inserted central catheterization performed by nurses in a pediatric and neonatal intensive care unit. Method: A quantitative, exploratory-descriptive, single-case study, whose sample consisted of the non-participant observation of 101 peripherally inserted central catheter procedures. The cost was calculated by multiplying the execution time (timed using a chronometer) spent by nursing professionals, participants in the procedure, by the unit cost of direct labor, added to the cost of materials, drugs, and solutions. Results: The average direct cost of the procedure was US$ 326.95 (standard deviation = US$ 84.47), ranging from US$ 99.03 to US$ 530.71, with a median of US$ 326.17. It was impacted by material costs and the direct labor of the nurses. Conclusion: The measurement of the average direct cost of the peripherally inserted central catheter procedure shed light on the financials of consumed resources, indicating possibilities of intervention aiming to increase efficiency in allocating these resources.

scholarly journals Direct cost of maintenance of totally implanted central venous catheter patency

2018 ◽  
Vol 26 (0) ◽  
Author(s):  
Rafael Fernandes Bel Homo ◽  
Antônio Fernandes Costa Lima
Keyword(s):  
Sodium Chloride ◽  
Central Venous Catheter ◽  
Direct Cost ◽  
Unit Cost ◽  
Venous Catheter ◽  
Total Direct Cost ◽  
Central Venous ◽  
Cost Of Materials ◽  
The Cost ◽  
Total Average

ABSTRACT Objective: to identify the average direct cost of maintaining the patency of totally implanted central venous catheter with heparin at a Day Hospital of a public hospital of high complexity specialized in the treatment of cancer patients, and estimate the average direct cost of replacing heparin with sodium chloride 0.9%. Method: quantitative, exploratory-descriptive study, with a sample of 200 non-participant observations of the maintenance of totally implanted central venous catheters with heparin. The average direct cost was calculated by multiplying the (clocked) time spent by professionals to complete the procedure by the direct unit cost of workforce, added to the cost of materials and solutions. Results: the estimated total direct cost of catheter maintenance with heparin was US$ 9.71 (SD=1.35) on average, ranging from US$ 7.98 to US$ 23.28. The estimated total direct cost of maintenance with 0.9% sodium chloride in the place of heparin was US$ 8.81 (SD=1.29) on average, resulting in a reduction of US$ 0.90 per procedure. Conclusion: the results contributed to propose strategies to assist in cost containment/minimization in this procedure. The replacement of heparin by 0.9% sodium chloride proved to be an option to reduce the total average direct cost.

scholarly journals Naso-pharyngeal carriage of Haemophilus influenzae type B

1963 ◽  
Vol 61 (2) ◽  
pp. 247-256 ◽  
Author(s):  
D.C. Turk
Keyword(s):  
Haemophilus Influenzae Type ◽  
High Concentration ◽  
Senior Lecturer ◽  
Parents And Children ◽  
High Concentrations ◽  
Cost Of Materials ◽  
The Cost ◽  
Day Nursery ◽  
The University ◽  
Normal Health

H.influenzae type b, the sero-type which causes meningitis, was isolated from 3 (2·4 %) of 127 naso-pharyngeal swabs from white non-Jamaican children resident in Jamaica, and from 14 (2·9 %) of 473 such swabs from a mixed group of Jamaican children. Much higher frequencies were found in households in which cases of haemophilus meningitis had recently occurred (41 %), in the nursery of an orphan home (up to 70%) and in a day-nursery. In the orphan home nursery the high frequency persisted over a number of months, but no case of meningitis or other relevant disease occurred. A high concentration of this organism is therefore compatible with normal health, and the significance of high concentrations in the homes of meningitis patients is not certain.I am indebted to the Standing Advisory Committee for Medical Research in the British Caribbean for a grant towards the cost of materials; to a number of colleagues at the University College of the West Indies, notably Dr E. H. Back, Senior Lecturer in Paediatrics, and the staff of the Department of Social and Preventive Medicine; to those in charge of the orphan home, the day-nursery, the play-school and the other institutions visited; to many cooperative parents and children and to my wife for help in the collection of specimens.

Optimal Design of Semi-Trailer Frame Based on Topology Optimization

2012 ◽  
Vol 197 ◽  
pp. 502-507
Author(s):  
Li Li Dai ◽  
Jing Gang Wang ◽  
Shuang Zhao ◽  
Ya Qiong Deng ◽  
Nan Jia
Keyword(s):  
Topology Optimization ◽  
Optimal Design ◽  
Dynamic Analysis ◽  
Dynamic Characteristics ◽  
Frame Structure ◽  
Topological Optimization ◽  
Static Characteristics ◽  
Manufacturing Efficiency ◽  
Original Frame ◽  
The Cost

40t semi-trailer frame is optimized by usage of topological optimization and static/dynamic analysis technology. After the optimization, The static characteristics of frame completely satisfy requirement of intensity and stiffness, and the quality is reduced by 10% compared with the original frame. The dynamic characteristics of the new frame have been improved greatly, which indicate that the optimized frame structure is more reasonable, and lay the foundation for reducing the cost and improving manufacturing efficiency.

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