scholarly journals NANOFLUIDS: LOOKING FOR MORE EFFICIENCY IN SOLAR HEATING SYSTEMS

2019 ◽  
Vol 10 (3) ◽  
Author(s):  
Etevaldo Francisco Carreira Junior ◽  
Reynaldo Palacios Bereche ◽  
Paulo Henrique De Mello Santana
Keyword(s):  
Thermal Conductivity ◽  
Solar Energy ◽  
Cost Benefit ◽  
Scale Production ◽  
Solar Collectors ◽  
Thermal Systems ◽  
Thermal Exchange ◽  
Heating Systems ◽  
Cost Benefit Ratio ◽  
History Of

Researches into the use of solar energy and its application in the form of heat have been intensified in the recent history of renewable energy. However, flat plate and evacuated tube solar collectors still have low capacity to convert solar energy to thermal energy due to several factors, including low thermal conductivity of the exchange fluid. Recent studies seek to make feasible the use of nanofluids, whose thermophysical properties, such as thermal conductivity, can improve the performance of solar collectors. The objective of this paper is to review the recent literature on solar water heating systems, identifying opportunities to apply nanofluids to solar collectors, in order to increase their efficiency. The results of the research point to gains of more than 20% in the efficiency of the collectors compared to the use of water as thermal exchange fluid, and also indicate that the carbon nanoparticles have the best cost-benefit ratio, although the nanofluids are not yet feasible for real applications, because there are challenges to be overcome by this technology, such as reducing the loss of stability, which reduces its useful life, reduce the complexity and cost of production for commercial scale production. It is concluded that there is in fact potential to apply nanofluids in solar thermal systems. 

Solar Concentrators

2019 ◽  
pp. 1-38
Author(s):  
Bekhruzi Talbi Shokhzoda ◽  
Mikhail Georgievich Tyagunov
Keyword(s):  
Renewable Energy ◽  
Solar Energy ◽  
Large Scale ◽  
Scale Production ◽  
Cell Area ◽  
Solar Panels ◽  
Solar Concentrators ◽  
Large Scale Production ◽  
History Of ◽  
The Cost

Looking at the history of solar energy and renewable energy in general, the authorities and scientists have been paying much attention to the recent period, due to the depletion of fossil energy resources and the growing difficulties in solving environmental problems. The development of solar energy has led to the use of solar energy concentrators. Concentrators are used to concentrate sunlight onto PV cells. This allows for a reduction in the cell area required for producing a given amount of power. The goal is to significantly reduce the cost of electricity generated by replacing expensive PV converter area with less expensive optical material. In this chapter, the authors talk about concentrators in solar energy, especially about modules based on holographic films. Holographic solar panels (HSP) in recent decades have appeared in large-scale production and been actively used in solar energy. Evaluations of other types of existing concentrators are presented.

scholarly journals Thrombolytic Enzymes of Microbial Origin: A Review

2021 ◽  
Vol 22 (19) ◽  
pp. 10468
Author(s):  
Deepti Diwan ◽  
Zeba Usmani ◽  
Minaxi Sharma ◽  
James W. Nelson ◽  
Vijay Kumar Thakur ◽  
...  
Keyword(s):  
Large Scale ◽  
Thrombus Formation ◽  
Physiological Mechanism ◽  
Vascular Occlusion ◽  
Cost Benefit ◽  
Scale Production ◽  
Large Scale Production ◽  
Cost Benefit Ratio ◽  
Current Scenario ◽  
Thrombotic Complications

Enzyme therapies are attracting significant attention as thrombolytic drugs during the current scenario owing to their great affinity, specificity, catalytic activity, and stability. Among various sources, the application of microbial-derived thrombolytic and fibrinolytic enzymes to prevent and treat vascular occlusion is promising due to their advantageous cost–benefit ratio and large-scale production. Thrombotic complications such as stroke, myocardial infarction, pulmonary embolism, deep venous thrombosis, and peripheral occlusive diseases resulting from blood vessel blockage are the major cause of poor prognosis and mortality. Given the ability of microbial thrombolytic enzymes to dissolve blood clots and prevent any adverse effects, their use as a potential thrombolytic therapy has attracted great interest. A better understanding of the hemostasis and fibrinolytic system may aid in improving the efficacy and safety of this treatment approach over classical thrombolytic agents. Here, we concisely discuss the physiological mechanism of thrombus formation, thrombo-, and fibrinolysis, thrombolytic and fibrinolytic agents isolated from bacteria, fungi, and algae along with their mode of action and the potential application of microbial enzymes in thrombosis therapy.

scholarly journals TRANSFORMATION OF TOOLS AND CONSERVATION OF ARCHITECTURE

2020 ◽  
Author(s):  
DONATELLA FIORANI ◽  
MARTA ACIERNO ◽  
SILVIA CUTARELLI ◽  
ADALGISA DONATELLI
Keyword(s):  
Methodological Approach ◽  
Cost Benefit ◽  
Risk Map ◽  
Computer Tools ◽  
Cost Benefit Ratio ◽  
History Of ◽  
History Of Architecture ◽  
Definition Of ◽  
New Research ◽  
Architectural Research

The use of digital technologies to study architecture and landscape has begun to represent an innovative aspect of the research when it started to allow the dynamic association (as input and output) of images and alphanumeric data: the different combination of this information through inferences and algorithms and the consequent generation of new data has freed digitisation from a strictly instrumental role making it a new methodological approach in itself.As a matter of fact, recently architectural research has begun to take an interest in the problem ‘from within’, working not only on the application of computer tools but, more consciously, on their configuration. The work carried out by the Sapienza research group is aimed at developing ontologies and inferential models specifically dedicated to the representation of historical buildings and is devoted to the implementation of a national GIS platform for the historical centres, the Risk Map of the Italian Ministry of Cultural Heritage and Activities and Tourism.This kind of work involves a series of methodological issues specially oriented to the definition of the role of the history of architecture in itself and its use for the conservation project. These arguments are developed within this essay, mainly focused on: type and quality of information deriving by the new procedures; interpretative components that fuel the new research methods; cost/benefit ratio in the use of ‘analogue’ and ‘digital’ approaches; future prospects of the two different (traditional and digital) investigative strategies. Moreover, both of the fields of digital research developed by the group (ontology and Risk Map) are here summarised.

Potential and Use of Solar Energy in Primorye Region (Russia)

Solar Energy ◽  
2004 ◽  
Author(s):  
Oleg P. Kovalev ◽  
Alexandr V. Volkov
Keyword(s):  
Solar Radiation ◽  
Solar Energy ◽  
Hot Water ◽  
Solar Collectors ◽  
Heating Systems ◽  
Primorye Region ◽  
Solar Radiation Flux ◽  
Radiation Regime ◽  
The Given

During long-term time, the laboratory of non-traditional energetic is been busy with development and introduction of solar water heating systems for hot water supply. The systems with solar collectors of 40 m2 area have been developed and introducted. For estimation of their efficiency we should know flux density of solar radiation, proceeding to surface at the given place. However in Primorye Region at actinometrical watching only four meteostations in the Southern part are carrying out straight measurements of solar radiation flux, and the others record data which concern only solar radiation regime (the amount of solar radiation hours, relation of watching duration of solar radiation to possible duration, the amount of days without sun, etc.). We suggested the expression, which according to know data of solar radiation and cloudiness, recorded practically on all meteorological stations gives possibility to calculate for Primorye Region month sums of total radiation proceeding to horizontal surface. The comparison of estimated values with measured ones gives the error to 3...9% with regard to average many years values, and are in the range of variability of measured values for separate years. In Primorye Region more than 250 m2 of solar collectors were installed; and among them 150 m2 were developed with the laboratory, to position on 2003.11.01.   NOTE: This paper was presented at the 2004 International Solar Energy Conference and was inadvertently omitted from the 2004 ASME proceedings. The page range refers to the 2005 International Solar Energy Conference Print Proceedings, where it was subsequently published.

Criteri e basi teoriche per un corretto approccio allo screening presintomatico delle malattie neoplastiche: Criteria and theoretical bases for a correct approach to presymptomatic screening of neoplastic diseases

1995 ◽  
Vol 62 (2) ◽  
pp. 288-295
Author(s):  
L. Di Silvio
Keyword(s):  
Treatment Protocol ◽  
Cost Benefit ◽  
Early Death ◽  
Test Reliability ◽  
Screening Methods ◽  
Neoplastic Diseases ◽  
Life Expectation ◽  
Cost Benefit Ratio ◽  
History Of ◽  
The Cost

The different criteria to be taken into consideration when carrying out presymptomatic screening of neoplastic diseases are given. Screening is an operation of secondary prevention and can be divided into: 1) mass screening 2) selective (or aimed) screening 3) multifascia screening (check up). The Author gives the fors and againsts of the above types of screening and concludes that they can lead to: 1) only a prolungation of the lead time 2) a more favourable life expectation 3) a normal life expectation with death due to the neoplasm 4) death for natural causes and not for the tumour 5) early death (iatrogenic). The general criteria laid down by the W.H.O. on the suitability of submitting a population to screening are: a) the pathology to be investigated must be an important problem both for health and socially b) a diagnostic protocol must be available for subjects who have a positive test result, as well as an effective treatment protocol for the diagnosed cases c) the investigated pathology must be characterised by a recognisable stage, latent or with early symptoms d) screening methods must be easy to carry out with no risks involved e) the screening must be acceptable for the invited population f) the natural history of the neoplasm must be sufficiently well-known g) the parameters of normality, allowing the positive patients to be distinguished from the negative ones, must be very clear h) assessment of the cost/benefit ratio i) the activity of early diagnosis must be a continuing and not an irregular service, on the basis of established protocols I) the availability of economic, staff and organisational resources must be guaranteed. In any case, the Author proposes that the screening programme be checked in terms of sensitivity (capacity to select the truly ill people), specificity (capacity to select the healthy ones) and predictive value (% value of test reliability).

scholarly journals Análisis del Potencial Energético Solar Basado en Mediciones in Situ en el Municipio de Acacías - Meta

2018 ◽  
Vol 3 (1) ◽  
pp. 690
Author(s):  
Angel Alejandro Rodriguez Aya ◽  
John Alejandro Figueredo Luna ◽  
Juan Alejandro Chica García
Keyword(s):  
Solar Energy ◽  
Solar Power ◽  
Cost Benefit ◽  
Energy Systems ◽  
Energy System ◽  
Photovoltaic System ◽  
Cost Benefit Ratio ◽  
The Cost ◽  
The University

This research presents the preliminary results of the research entitled Design and implementation of a fixed and mobile photovoltaic system to capture the solar power, determining the cost-benefit ratio for the Acacías CEAD, a study that will determine the solar power that affects the University National Open and Distance - UNAD of the municipality of Acacías and deliver a study to determine the solar radiation of the area, in order to verify the potentiality and feasibility of installing solar energy systems in the University and nearby areas; It has been possible to determine that solar power in the area per m² is close to 45% of that measured by IDEAM (Hydrology, Meteorology and Environmental Studies Institute in Colombia), with a potential absorption of 331W per day in an area of 1m², which makes feasible a possible implementation of a solar energy system. Keywords: Solar power, solar energy, solar panel, energy efficiency.

scholarly journals Prognosticating ovarian reserve by the new ovarian response prediction index

2018 ◽  
Vol 7 (3) ◽  
pp. 1196
Author(s):  
Apoorva Tak ◽  
Madhubala Chauhan ◽  
Bharti Tak
Keyword(s):  
Ovarian Stimulation ◽  
Cost Benefit ◽  
Ovarian Response ◽  
Response Prediction ◽  
Endocrine Disorders ◽  
Benefit Ratio ◽  
Cost Benefit Ratio ◽  
History Of ◽  
The Cost ◽  
Selection Of

Background: Knowledge of patient's potential ovarian response can help individualise the medication dosage and thus prevent adverse effect of excessive ovarian response and, decrease the rates of cancelled cycles, overall it will help to improve the cost benefit ratio of ovarian stimulation regimes. In addition to age, several clinical, endocrine and USG markers and dynamic tests have been proposed for the prediction of ovarian response to stimulation. Among these use of AMH levels and AFC are of particular interest However, despite the predictive power that each marker for the ovarian response may individually have, all these markers have errors associated with their estimation. So, prediction of ovarian response using a single biomarker may not be sufficient for formulation of a precise treatment plan.Methods: This study includes 50 patients undergoing ivf cycle. All patients satisfied the following criteria; age <or equal to 39 yrs, BMI between 20-30, regular menstrual cycles, both ovaries present, no history of ovarian surgery, no severe endometriosis and no evidence of endocrine disorders. The only exclusion criteria was the presence of ovarian cysts as assessed by TVS.Results: The results showed significant correlation between the number of obtained follicles and the number and maturity of collected oocytes. In addition, the results using the ORPI were always better than those obtained using other predictive factors (AFC, AGE and AMH) separately.Conclusions: The present study reinforces the ORPI, which is a simple 3 variable index that exhibits an excellent ability to predict low and excessive ovarian response. ORPI might be used to improve the cost benefit ratio of ovarian stimulation regimens by guiding the selection of medication and by tailoring the doses and regimens to the actual needs of patients.

Methods and clinical applications in nuclear cardiology: a position statement

2002 ◽  
Vol 41 (01) ◽  
pp. 3-13 ◽  
Author(s):  
M. Schäfers
Keyword(s):  
Nuclear Cardiology ◽  
Clinical Medicine ◽  
Imaging Techniques ◽  
Cost Savings ◽  
Cost Benefit ◽  
Position Statement ◽  
Electron Beam Tomography ◽  
Partial Functions ◽  
Cost Benefit Ratio ◽  
Medicine Today

SummaryNuclear cardiological procedures have paved the way for non-invasive diagnostics of various partial functions of the heart. Many of these functions cannot be visualised for diagnosis by any other method (e. g. innervation). These techniques supplement morphological diagnosis with regard to treatment planning and monitoring. Furthermore, they possess considerable prognostic relevance, an increasingly important issue in clinical medicine today, not least in view of the cost-benefit ratio.Our current understanding shows that effective, targeted nuclear cardiology diagnosis – in particular for high-risk patients – can contribute toward cost savings while improving the quality of diagnostic and therapeutic measures.In the future, nuclear cardiology will have to withstand mounting competition from other imaging techniques (magnetic resonance imaging, electron beam tomography, multislice computed tomography). The continuing development of these methods increasingly enables measurement of functional aspects of the heart. Nuclear radiology methods will probably develop in the direction of molecular imaging.

Calisthenics and bodyweight exercises: different concepts or scientific synonyms?

2020 ◽  
Vol 19 (1) ◽  
pp. 13
Author(s):  
Leury Max Da Silva Chaves ◽  
Gabriel Vinicius Santos ◽  
Cauê La Scala Teixeira ◽  
Marzo Edir Da Silva-Grigoletto
Keyword(s):  
Body Weight ◽  
19Th Century ◽  
Scientific Literature ◽  
Cost Benefit ◽  
Training Method ◽  
Benefit Ratio ◽  
Cost Benefit Ratio ◽  
The 19Th Century

 Bodyweight exercises (also popularly known as calisthenics) is a classic training method and its practice has been widespread since the 19th century, but little evidenced in the scientific literature over the years. This type of training aims to promote multi-system adaptations using body weight as an overload with no or few implements [1–3]. This characteristic makes exercise with body weight easy to apply, in addition to having an excellent cost-benefit ratio when compared to other training possibilities that require machines or materials [4,5].

Alternaria and Cercospora Leaf Spot Diseases of Niger (Guizotia abyssinica Cass.) – A Traditional Tribal Crop of South Gujarat, India, with Cost Benefit Ratio in Relation to Different Fungicides

2018 ◽  
Vol 51 (3) ◽  
pp. 89-99
Author(s):  
P.B. Sandipan ◽  
P.K. Jagtap ◽  
M.C. Patel
Keyword(s):  
Field Experiment ◽  
Seed Yield ◽  
Leaf Spot ◽  
Foliar Spray ◽  
Cost Benefit ◽  
Research Station ◽  
Guizotia Abyssinica ◽  
Cercospora Leaf Spot ◽  
Benefit Ratio ◽  
Cost Benefit Ratio

Abstract Niger (Guizotia abyssinica Cass.) is an important minor oil seed crop grown in dry areas grown mostly by tribal and interior places as life line of tribal segment. Tribal people mainly use its oil for cooking purpose, above than that there were also other uses. Hence, the niger crop should be protected from the infection. The crop is affected by number of fungal diseases. Therefore, a field experiment was formulated for three years with the four replications at the Niger Research Station (NRS) at Navsari Agricultural University (NAU), Vanarasi, Navsari (Gujarat) on the foliar diseases of GN-1 variety of niger crop. In this experiment, six different fungicides along with one control have been evaluated to control the Alternaria and Cercospora leaf spot diseases, out of which all the fungicidal treatments were significantly superior over the control. Here, foliar spray on the incidence of diseases was compared with the control (without any treatment). All the fungicidal treatments were significantly superior over the control to reduce Alternaria and Cercospora leaf spot diseases of Niger crop. Treatment of Carbendazim + Mancozeb (0.2 %) with two sprays first from the initiation of the disease and second after the interval of 15 days recorded the lowest incidence of Alternaria (14.56) and Cercospora (14.94) leaf spot diseases of niger and recorded the highest seed yield 337 seed yield kg/ha along with the net return with cost benefit ratio graph.

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