scholarly journals Analysis of the optimization of the construction process of ecological brick compared to ceramic brick

2021 ◽  
Vol 9 (10) ◽  
pp. 156-173
Author(s):  
Francisca das Chagas Oliveira ◽  
Paulysendra Felipe Silva ◽  
Phillype Dowglas Lopes ◽  
Rebeka Manuela Lobo Sousa ◽  
Gilvan Moreira da Paz ◽  
...  
Keyword(s):  
Literature Review ◽  
Low Cost ◽  
Hydraulic Press ◽  
Construction Process ◽  
Ceramic Brick ◽  
Total Cost ◽  
Ceramic Blocks ◽  
Block Wall ◽  
Pillar Structure ◽  
The Cost

The brick is composed of water, soil and cement, having an easy manufacturing process, with short construction and low cost is not subjected to burning is manufactured by a very different process from ceramic blocks, the same goes through a hydraulic press. This type of brick has characteristics that provide quality, sustainability, beauty, and above all savings in the total cost of the work. When used in construction are eliminated some steps and the execution time in the work. A block wall or ceramic brick will need roughcast, sketch, plaster, seamer and painting, besides considering the cost of these materials can not forget the labor that corresponds to an average 50% of the value of the work. But the great advantage over the other bricks is its construction system, once raised the wall this is ready, does not need finishing, and the pillar structure and beams are ready with it. Electrical and Hydraulic Installations are easily installed without the need for breakage and waste. These bricks do not require the use of mortars for laying, coatings such as plastering for regularization and finishing of walls, in addition to accelerating the work with their fittings that facilitate the alignment and plumb of the walls. The objective of this work is present through a literature review of optimization processes that involve the ecological brick. in addition to accelerating the work with their fittings that facilitate the alignment and plumb of the walls. The objective of this work is present through a literature re-view of optimization processes that involve the ecological brick. in addition to accelerating the work with their fittings that facilitate the alignment and plumb of the walls. The objective of this work is present through a literature review of optimization processes that involve the ecological brick.

MODELING AND SIMULATION OF THE PRODUCTION OF HYDROGEN USING HYDROELECTRICITY IN VENEZUELA

2018 ◽  
pp. 88-95 ◽  
Author(s):  
A. Contrerasa ◽  
F. Possob ◽  
Т. N. Veziroglu
Keyword(s):  
Mathematical Model ◽  
Hydrogen Production ◽  
Modeling And Simulation ◽  
Regression Models ◽  
Low Cost ◽  
Total Cost ◽  
Time Horizons ◽  
Proposed Model ◽  
Production Of Hydrogen ◽  
The Cost

The purpose of this work is to develop and evaluate a mathematical model for the process of hydrogen production in Venezuela, via electrolysis and using hydroelectricity, with a view to using it as an energy vector in rural sectors of the country. Regression models were prepared to estimate the fluctuation of the main variables involved in the process: the production of hydrogen, the efficiency of energy conversion, the cost of hydroelectricity and the cost of the electrolyser. Finally, the proposed model was applied to various different time-horizons and populations, obtaining the cost of hydrogen production in each case. The results obtained are well below those mentioned in the references, owing largely to the low cost of the electricity used, which accounts for around 45% of the total cost of the system.

scholarly journals Costs of nursing procedures/interventions: an integrative literature review

2020 ◽  
Vol 73 (suppl 6) ◽  
Author(s):  
Paula Buck de Oliveira Ruiz ◽  
Caroline Rife Nobrega ◽  
Cínthia Prates Vigna ◽  
Antônio Fernandes Costa Lima
Keyword(s):  
Health Care ◽  
Literature Review ◽  
Indirect Costs ◽  
Direct Costs ◽  
Scientific Production ◽  
Case Study Method ◽  
Total Cost ◽  
The Cost ◽  
Nursing Professionals

ABSTRACT Objectives: to analyze the scientific production of nurses regarding the costs of procedures/interventions performed by nursing professionals. Methods: integrative literature review with a sample of 17 primary articles selected from the CINAHL, Scopus, EMBASE databases and the PubMed portal. Results: all studies were conducted in hospitals, with quantitative, exploratory-descriptive studies, considering the case study method, with the description of costs method adopted, and the number of Brazilian publications stood out (12; 70.58%). The calculation of direct costs was most common due to the absence/difficulty of accessing information in the studied hospitals. This made it impossible to obtain the indirect costs that would be necessary for the composition of the total cost. Conclusions: it was shown that studies about the cost of procedures/interventions are still scarce, often covering only the calculation of direct costs. Nurses need to develop studies on such costs using the same methodology in different contexts of health care.

scholarly journals Using Clustering Techniques  to Guide Refactoring of  Object-Oriented Classes

2021 ◽  
Author(s):  
◽  
Keith Cassell
Keyword(s):  
Software Development ◽  
Open Source ◽  
Low Cost ◽  
Research Question ◽  
Object Oriented ◽  
Fundamental Unit ◽  
Total Cost ◽  
Clustering Techniques ◽  
The Cost ◽  
Refactoring Tools

<p>Much of the cost of software development is maintenance. Well structured software tends to be cheaper to maintain than poorly structured software, because it is easier to analyze and modify. The research described in this thesis concentrates on determining how to improve the structure of object-oriented classes, the fundamental unit of organization for object-oriented programs. Some refactoring tools can mechanically restructure object-oriented classes, given the appropriate inputs regarding what attributes and methods belong in the revised classes. We address the research question of determining what belongs in those classes, i.e., determining which methods and attributes most belong together and how those methods and attributes can be organized into classes. Clustering techniques can be useful for grouping entities that belong together; however, doing so requires matching an appropriate algorithm to the domain task and choosing appropriate inputs. This thesis identifies clustering techniques suitable for determining the redistribution of existing attributes and methods among object-oriented classes, and discusses the strengths and weaknesses of these techniques. It then describes experiments using these techniques as the basis for refactoring open source Java classes and the changes in the class quality metrics that resulted. Based on these results and on others reported in the literature, it recommends particular clustering techniques for particular refactoring problems. These clustering techniques have been incorporated into an open source refactoring tool that provides low-cost assistance to programmers maintaining object-oriented classes. Such maintenance can reduce the total cost of software development.</p>

scholarly journals Literature review and economic evaluation of oral and intramuscular ziprasidone treatment among patients with schizophrenia in China

2019 ◽  
Vol 31 (3) ◽  
pp. e100016 ◽  
Author(s):  
Yu-Chen Yeh ◽  
Xin Yu ◽  
Congpei Zhang ◽  
Wei Hao ◽  
Fen Du ◽  
...  
Keyword(s):  
Literature Review ◽  
Economic Model ◽  
Chinese Literature ◽  
Unit Cost ◽  
Hospital Length Of Stay ◽  
Medication Cost ◽  
Base Case ◽  
Total Cost ◽  
Acute Agitation ◽  
The Cost

BackgroundOver 10 million Chinese are affected by schizophrenia. The annual cost of schizophrenia in China was estimated at US$2586 per patient.AimsThe study has two aims: (1) to conduct a targeted literature review of the economic literature on oral ziprasidone in China, and (2) to develop an inpatient economic model that compared the cost of intramuscular ziprasidone with other regimens including electroconvulsive therapy (ECT) for the management of acute agitation in patients with schizophrenia from a hospital’s perspective in China.MethodsA targeted literature review was conducted using PubMed and the Chinese literature databases for studies published between January 2007 and December 2017. Studies that assessed costs associated with oral ziprasidone treatment for schizophrenia in China were summarised. In the inpatient economic model, cost measures included hospital room and board, antipsychotics, ECT and medications for the management of extrapyramidal symptoms (EPS). Input for standard antipsychotic regimens and unit cost were obtained from the literature. Hospital length of stay (LOS), utilisation of ECT and incidence of EPS were derived from the literature and supplemented/validated with a survey of psychiatrists in China. Cost was presented in 2017 Chinese yuan.ResultsThe average estimated LOS was 29 days with ziprasidone, 33 days with risperidone+benzodiazepine, 32 days with olanzapine, 35 days with haloperidol and 29 days with ECT. The cost of antipsychotics was ¥1260 with ziprasidone, ¥137 with risperidone+benzodiazepine, ¥913 with olanzapine and ¥210 with haloperidol; ECT treatment cost ¥785. The base-case analysis suggested that higher antipsychotic cost with ziprasidone was offset by savings with shorter LOS. Using intramuscular ziprasidone for acute management was associated with a total cost of ¥11 157, the lowest among all antipsychotic regimens (¥11 424 with risperidone+benzodiazepine, ¥11 711 with olanzapine and ¥11 912 with haloperidol) and slightly higher than ECT (¥10 606). The cost of antipsychotics and ECT accounted for 1 %–11 % of the total cost. Varying LOS between the lower and upper bounds of the 95% CI, the total cost was comparable between these regimens.ConclusionsOverall, the cost for the management of acute agitation was similar between intramuscular ziprasidone and other antipsychotics. Compared with other antipsychotics, the higher medication cost of intramuscular ziprasidone can be offset by savings with shorter hospital stay. The results from this economic analysis were complementary to the findings in the published literature assessing the economic outcomes of oral ziprasidone.

A Study on the Thickness of Heat Insulation Materials Based on Total Cost of the Optimal Principle

2014 ◽  
Vol 1079-1080 ◽  
pp. 579-583
Author(s):  
Hui Han
Keyword(s):  
Heat Insulation ◽  
Low Cost ◽  
Simulation Software ◽  
Shopping Mall ◽  
Insulation Material ◽  
Original Design ◽  
Total Cost ◽  
Insulation Materials ◽  
The Cost ◽  
Whole Life Cycle

The cost of building insulation materials in construction phase has a significant impact on its energy costs in operational phase, so that it plays a meaningful role to make the total cost of insulation material low in both phases. From the point of the selection to thickness of outer heat insulation materials, this paper, making full use of energy simulation software, is keen to study on the thickness of heat insulation materials based on optimal cost principle in perspective of whole life cycle, in case of an artitecture in a some shopping mall. With the aid of eQUEST energy smulation software, this paper tries to simulate the cost of cooling and heating technology, besides it simulates different thick insultion materials, which takes advantage of mathematical models to acquire the relationship between energy consumption and thermal insulation. At last, it can be summarised the best thickness of heat insulation materials with low cost, and it can also provide some proposed improvements for the original design through comparision.

scholarly journals Machine Learning for Light Sensor Calibration

Sensors ◽  
2021 ◽  
Vol 21 (18) ◽  
pp. 6259
Author(s):  
Yichao Zhang ◽  
Lakitha O. H. Wijeratne ◽  
Shawhin Talebi ◽  
David J. Lary
Keyword(s):  
Machine Learning ◽  
Driving Force ◽  
Low Cost ◽  
Radiative Heating ◽  
Sensor Calibration ◽  
Total Cost ◽  
Environmental Processes ◽  
Neighborhood Scale ◽  
The Cost ◽  
Reference Sensor

Sunlight incident on the Earth’s atmosphere is essential for life, and it is the driving force of a host of photo-chemical and environmental processes, such as the radiative heating of the atmosphere. We report the description and application of a physical methodology relative to how an ensemble of very low-cost sensors (with a total cost of <$20, less than 0.5% of the cost of the reference sensor) can be used to provide wavelength resolved irradiance spectra with a resolution of 1 nm between 360–780 nm by calibrating against a reference sensor using machine learning. These low-cost sensor ensembles are calibrated using machine learning and can effectively reproduce the observations made by an NIST calibrated reference instrument (Konica Minolta CL-500A with a cost of around USD 6000). The correlation coefficient between the reference sensor and the calibrated low-cost sensor ensemble has been optimized to have R2> 0.99. Both the circuits used and the code have been made publicly available. By accurately calibrating the low-cost sensors, we are able to distribute a large number of low-cost sensors in a neighborhood scale area. It provides unprecedented spatial and temporal insights into the micro-scale variability of the wavelength resolved irradiance, which is relevant for air quality, environmental and agronomy applications.

An aviation approach to space transportation

2009 ◽  
Vol 113 (1146) ◽  
pp. 499-515 ◽  
Author(s):  
D. Ashford
Keyword(s):  
Low Cost ◽  
Launch Vehicles ◽  
Cost Estimates ◽  
Total Cost ◽  
Potential Benefits ◽  
Orbital Space ◽  
The Cost ◽  
Space Transportation

Abstract This paper presents a strategy for developing the first orbital spaceplane soon and at low cost and risk. The paper then shows how this vehicle will introduce an aviation approach to orbital space transportation to replace the present missile paradigm, leading to far lower costs and improved safety. To illustrate the potential benefits, the paper presents preliminary sizing and cost estimates of a simple lunar base. Even including the cost of developing the spaceplanes and other vehicles required, the total cost is about ten times less than that of present plans that use large new expendable launch vehicles. Timescales need not be greatly affected.

scholarly journals Using Clustering Techniques  to Guide Refactoring of  Object-Oriented Classes

2021 ◽  
Author(s):  
◽  
Keith Cassell
Keyword(s):  
Software Development ◽  
Open Source ◽  
Low Cost ◽  
Research Question ◽  
Object Oriented ◽  
Fundamental Unit ◽  
Total Cost ◽  
Clustering Techniques ◽  
The Cost ◽  
Refactoring Tools

<p>Much of the cost of software development is maintenance. Well structured software tends to be cheaper to maintain than poorly structured software, because it is easier to analyze and modify. The research described in this thesis concentrates on determining how to improve the structure of object-oriented classes, the fundamental unit of organization for object-oriented programs. Some refactoring tools can mechanically restructure object-oriented classes, given the appropriate inputs regarding what attributes and methods belong in the revised classes. We address the research question of determining what belongs in those classes, i.e., determining which methods and attributes most belong together and how those methods and attributes can be organized into classes. Clustering techniques can be useful for grouping entities that belong together; however, doing so requires matching an appropriate algorithm to the domain task and choosing appropriate inputs. This thesis identifies clustering techniques suitable for determining the redistribution of existing attributes and methods among object-oriented classes, and discusses the strengths and weaknesses of these techniques. It then describes experiments using these techniques as the basis for refactoring open source Java classes and the changes in the class quality metrics that resulted. Based on these results and on others reported in the literature, it recommends particular clustering techniques for particular refactoring problems. These clustering techniques have been incorporated into an open source refactoring tool that provides low-cost assistance to programmers maintaining object-oriented classes. Such maintenance can reduce the total cost of software development.</p>

Effect of Computerized Auditory Training on Speech Perception of Adults With Hearing Impairment

2013 ◽  
Vol 20 (3) ◽  
pp. 91-106 ◽  
Author(s):  
Rachel Pizarek ◽  
Valeriy Shafiro ◽  
Patricia McCarthy
Keyword(s):  
Hearing Loss ◽  
Speech Perception ◽  
Literature Review ◽  
Low Cost ◽  
Experimental Designs ◽  
Auditory Training ◽  
Hearing Impairments ◽  
Communicative Disorders ◽  
And Training

Computerized auditory training (CAT) is a convenient, low-cost approach to improving communication of individuals with hearing loss or other communicative disorders. A number of CAT programs are being marketed to patients and audiologists. The present literature review is an examination of evidence for the effectiveness of CAT in improving speech perception in adults with hearing impairments. Six current CAT programs, used in 9 published studies, were reviewed. In all 9 studies, some benefit of CAT for speech perception was demonstrated. Although these results are encouraging, the overall quality of available evidence remains low, and many programs currently on the market have not yet been evaluated. Thus, caution is needed when selecting CAT programs for specific patients. It is hoped that future researchers will (a) examine a greater number of CAT programs using more rigorous experimental designs, (b) determine which program features and training regimens are most effective, and (c) indicate which patients may benefit from CAT the most.

Advance Protection for Three Phase Induction Motor using Microcontroller Atmega32

2018 ◽  
Vol 8 (1) ◽  
pp. 172
Author(s):  
Karan S Belsare ◽  
Gajanan D Patil
Keyword(s):  
Induction Motor ◽  
Low Cost ◽  
Short Circuit ◽  
Cost Factor ◽  
Protection Scheme ◽  
Three Phase ◽  
The Cost

A low cost and reliable protection scheme has been designed for a three phase induction motor against unbalance voltages, under voltage, over voltage, short circuit and overheating protection. Taking the cost factor into consideration the design has been proposed using microcontroller Atmega32, MOSFETs, relays, small CTs and PTs. However the sensitivity of the protection scheme has been not compromised. The design has been tested online in the laboratory for small motors and the same can be implemented for larger motors by replacing the i-v converters and relays of suitable ratings.

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