scholarly journals Efficient designs for sampling and subsampling in fisheries research based on ranked sets

2009 ◽  
Vol 66 (5) ◽  
pp. 928-934 ◽  
Author(s):  
You-Gan Wang ◽  
Yimin Ye ◽  
David A. Milton
Keyword(s):  
Simple Random Sampling ◽  
Optimality Criteria ◽  
Abundance Index ◽  
Sampling Schemes ◽  
Concomitant Variables ◽  
Monitoring Survey ◽  
Catch Rates ◽  
The Cost ◽  
Selection Of ◽  
Age Prediction

Abstract Wang, Y-G., Ye, Y., and Milton, D. A. 2009. Efficient designs for sampling and subsampling in fisheries research based on ranked sets. – ICES Journal of Marine Science, 66: 928–934. Sampling strategies are developed based on the idea of ranked set sampling (RSS) to increase efficiency and therefore to reduce the cost of sampling in fishery research. The RSS incorporates information on concomitant variables that are correlated with the variable of interest in the selection of samples. For example, estimating a monitoring survey abundance index would be more efficient if the sampling sites were selected based on the information from previous surveys or catch rates of the fishery. We use two practical fishery examples to demonstrate the approach: site selection for a fishery-independent monitoring survey in the Australian northern prawn fishery (NPF) and fish age prediction by simple linear regression modelling a short-lived tropical clupeoid. The relative efficiencies of the new designs were derived analytically and compared with the traditional simple random sampling (SRS). Optimal sampling schemes were measured by different optimality criteria. For the NPF monitoring survey, the efficiency in terms of variance or mean squared errors of the estimated mean abundance index ranged from 114 to 199% compared with the SRS. In the case of a fish ageing study for Tenualosa ilisha in Bangladesh, the efficiency of age prediction from fish body weight reached 140%.

scholarly journals Persepsi Pengunjung Terhadap Keberadaan Wana Wisata Puncak Damar dalam Pelestarian Hutan

2018 ◽  
Vol 6 (2) ◽  
pp. 73 ◽  
Author(s):  
Intan Okta Mulyana ◽  
Endah Djuwendah
Keyword(s):  
Forest Conservation ◽  
Research Result ◽  
Simple Random Sampling ◽  
Male Gender ◽  
High School Education ◽  
Survey Method ◽  
Literature Study ◽  
Quantitative Design ◽  
The Cost ◽  
Selection Of

This research to identify the characteristics of visitors and analyze the perception of visitors to management of Wana Wisata Damar Peak in forest conservation. Visitor perseption in review of service, infrastructure, environment (physical, social, and culture), and forest conservation. The research location in Pakualam Village, Darmaraja Subdistrict, Sumedang Regency, West Java Province from late june to erly july 2017. Research design is a quantitative design using survey method. Data collegtiorn using interviews, observation, and literature study. The selection of sample using simple random sampling, with the number of respondents as many as 100 people. Research result indicated that most ofvisitors came from Sumedang, male gender, aged between 20 – 29 years old, with high school education as a student and have income less than Rp 1.000.000, the purpose of visiting in general for a vacation because this place is attractive  and cheap entry fees, most visitors budgeted for the cost of recreation per mont less than Rp 200.000. Almost half of the visitors came with friends using their own vehicles, doing a one-time visit and interested to visid again. Visitor perception to management of Damar Peak in the forest conservation is still not good because the manager and the community is still lacking in the effort of forest conservation.

Determination of the minimum number of technological bases of a part

2020 ◽  
pp. 73-75
Author(s):  
B.M. Bazrov ◽  
T.M. Gaynutdinov
Keyword(s):  
Cost Price ◽  
Labor Input ◽  
Part Surface ◽  
Technological Base ◽  
Size Accuracy ◽  
Minimum Number ◽  
The Cost ◽  
Input Cost ◽  
Selection Of

The selection of technological bases is considered before the choice of the type of billet and the development of the route of the technological process. A technique is proposed for selecting the minimum number of sets of technological bases according to the criterion of equality in the cost price of manufacturing the part according to the principle of unity and combination of bases at this stage. Keywords: part, surface, coordinating size, accuracy, design and technological base, labor input, cost price. [email protected]

scholarly journals The Recent Progress of Natural Sources and Manufacturing Process of Biodiesel: A Review

2021 ◽  
Vol 13 (10) ◽  
pp. 5599
Author(s):  
Eko Supriyanto ◽  
Jayan Sentanuhady ◽  
Ariyana Dwiputra ◽  
Ari Permana ◽  
Muhammad Akhsin Muflikhun
Keyword(s):  
Recent Progress ◽  
Review Paper ◽  
Ghg Emissions ◽  
Production Method ◽  
Biodiesel Production ◽  
Natural Sources ◽  
Harmful Emissions ◽  
Daily Energy ◽  
The Cost ◽  
Selection Of

Biodiesel has caught the attention of many researchers because it has great potential to be a sustainable fossil fuel substitute. Biodiesel has a non-toxic and renewable nature and has been proven to emit less environmentally harmful emissions such as hydrocarbons (HC), and carbon monoxide (CO) as smoke particles during combustion. Problems related to global warming caused by greenhouse gas (GHG) emissions could also be solved by utilizing biodiesel as a daily energy source. However, the expensive cost of biodiesel production, mainly because of the cost of natural feedstock, hinders the potential of biodiesel commercialization. The selection of natural sources of biodiesel should be made with observations from economic, agricultural, and technical perspectives to obtain one feasible biodiesel with superior characteristics. This review paper presents a detailed overview of various natural sources, their physicochemical properties, the performance, emission, and combustion characteristics of biodiesel when used in a diesel engine. The recent progress in studies about natural feedstocks and manufacturing methods used in biodiesel production were evaluated in detail. Finally, the findings of the present work reveal that transesterification is currently the most superior and commonly used biodiesel production method compared to other methods available.

Recruitment and selection of couples for intervention research: Achieving developmental homogeneity at the cost of demographic diversity.

2006 ◽  
Vol 74 (4) ◽  
pp. 777-784 ◽  
Author(s):  
Ronald D. Rogge ◽  
Rebecca J. Cobb ◽  
Lisa B. Story ◽  
Matthew D. Johnson ◽  
Erika E. Lawrence ◽  
...  
Keyword(s):  
Intervention Research ◽  
Demographic Diversity ◽  
Recruitment And Selection ◽  
The Cost ◽  
Selection Of

Construction of Temporary Accommodation Camp and Selection of Optimal Type of Building

2015 ◽  
Vol 725-726 ◽  
pp. 105-110
Author(s):  
Aleksandr Birjukov ◽  
Sergey Bolotin
Keyword(s):  
Type Systems ◽  
Structural Systems ◽  
Basic Criterion ◽  
Economic Indexes ◽  
The Cost ◽  
Container Type ◽  
Selection Of ◽  
Optimal Type ◽  
Temporary Accommodation

Surveys performed nationwide show that mobile temporary accommodation camps are being manufactured by more than 200 specialized enterprises (without considering the minor manufacturers) acting under different ministries and agencies. According to the analysis performed, today 26 basic mobile structural systems consisting of 18 conveyor-type and 8 demountable-type systems are being used on a national basis. Today national manufacturers are producing more than 250 types of container-type buildings and facilities which differ in functionality, capacity, climatic category, price and other technical-and-economic indexes. Use of mobile accommodation complexes is characterized by certain advantages. Basic criterion for mobile accommodation camp construction consists in its timely commissioning. Basic predicted indexes affecting the cost of temporary accommodation camp could serve as an endorsement of the forwarded standpoint.

scholarly journals Bayesian Analysis of Finite Populations under Simple Random Sampling

Entropy ◽  
2021 ◽  
Vol 23 (3) ◽  
pp. 318
Author(s):  
Manuel Mendoza ◽  
Alberto Contreras-Cristán ◽  
Eduardo Gutiérrez-Peña
Keyword(s):  
Bayesian Analysis ◽  
Random Sampling ◽  
Simple Random Sampling ◽  
Survey Sampling ◽  
Finite Populations ◽  
Population Means ◽  
Sampling Schemes ◽  
Nonparametric Approach ◽  
Conventional Procedure ◽  
Continuous And Discrete Variables

Statistical methods to produce inferences based on samples from finite populations have been available for at least 70 years. Topics such as Survey Sampling and Sampling Theory have become part of the mainstream of the statistical methodology. A wide variety of sampling schemes as well as estimators are now part of the statistical folklore. On the other hand, while the Bayesian approach is now a well-established paradigm with implications in almost every field of the statistical arena, there does not seem to exist a conventional procedure—able to deal with both continuous and discrete variables—that can be used as a kind of default for Bayesian survey sampling, even in the simple random sampling case. In this paper, the Bayesian analysis of samples from finite populations is discussed, its relationship with the notion of superpopulation is reviewed, and a nonparametric approach is proposed. Our proposal can produce inferences for population quantiles and similar quantities of interest in the same way as for population means and totals. Moreover, it can provide results relatively quickly, which may prove crucial in certain contexts such as the analysis of quick counts in electoral settings.

The Use of SGLT2i and GLP-1 RA in Patients with Type 2 Diabetes in Thailand: Evidence Review and Recommendations

2021 ◽  
Vol 104 (11) ◽  
pp. 1850-1865
Keyword(s):  
Type 2 Diabetes ◽  
Glucose Lowering ◽  
Sodium Glucose Cotransporter ◽  
Evidence Review ◽  
Glucagon Like Peptide ◽  
Glucagon Like Peptide 1 ◽  
Glucose Lowering Therapy ◽  
The Cost ◽  
Selection Of

Background: Cardiovascular (CV) and renal comorbidities are common among type 2 diabetes (T2D) patients, and significantly increase the cost and burden of care. Both sodium-glucose cotransporter-2 inhibitors (SGLT2i) and glucagon-like peptide-1 receptor agonists (GLP-1 RA) improve key outcomes including major CV events, hospitalization for heart failure, and renal outcomes, albeit to varying degrees in different T2D populations. Materials and Methods: The authors reviewed evidence from GLP-1 RA and SGLT2i CV outcomes trials and real-world studies in Thailand and elsewhere. Results: The authors formulated recommendations to guide selection of anti-diabetes medication based on patients’ clinical characteristics and CV or renal risk profile. Conclusion: These recommendations could help guide management of CV/renal comorbidities and risk alongside glucose-lowering therapy for individual patients. Keywords: Type 2 diabetes mellitus; Cardiovascular diseases; Chronic kidney disease; Clinical outcomes; SGLT2i; GLP-1 RA

Influence of the cost of technological equipment of body production on indicators of efficiency of working processes

2021 ◽  
pp. 28-32
Author(s):  
Keyword(s):  
Quality Index ◽  
Production Efficiency ◽  
Statistical Data ◽  
The Body ◽  
Technological Equipment ◽  
Production Body ◽  
Body Production ◽  
The Cost ◽  
Efficiency Indicators ◽  
Selection Of

The possibilities for the development of bodywork in the context of the growing level of competition are analyzed in the article. The technological processes of bodywork are considered and the problem of choosing technological equipment is indicated. The statistical data about the efficiency indicators of company body divisions, operating in the body repair market in Krasnoyarsk, are presented. A composite quality index for the equipment of the bodywork department (using the example of body stocks) is proposed and calculated, and on its basis, some recommendations are given for companies which plan to enter the market of body repair services. Keywords: body production, body repair, body equipment, body production efficiency, selection of technological equipment

Prescreening in large populations as a tool for identifying elevated CO2-responsive genotypes in plants

2019 ◽  
Vol 46 (1) ◽  
pp. 1 ◽  
Author(s):  
Hiroyuki Shimono ◽  
Graham Farquhar ◽  
Matthew Brookhouse ◽  
Florian A. Busch ◽  
Anthony O'Grady ◽  
...  
Keyword(s):  
Genetic Selection ◽  
Co2 Concentration ◽  
Elevated Atmospheric Co2 ◽  
High Performing ◽  
Active Selection ◽  
Wide Range ◽  
Large Populations ◽  
Increase Productivity ◽  
The Cost ◽  
Selection Of

Elevated atmospheric CO2 concentration (e[CO2]) can stimulate the photosynthesis and productivity of C3 species including food and forest crops. Intraspecific variation in responsiveness to e[CO2] can be exploited to increase productivity under e[CO2]. However, active selection of genotypes to increase productivity under e[CO2] is rarely performed across a wide range of germplasm, because of constraints of space and the cost of CO2 fumigation facilities. If we are to capitalise on recent advances in whole genome sequencing, approaches are required to help overcome these issues of space and cost. Here, we discuss the advantage of applying prescreening as a tool in large genome×e[CO2] experiments, where a surrogate for e[CO2] was used to select cultivars for more detailed analysis under e[CO2] conditions. We discuss why phenotypic prescreening in population-wide screening for e[CO2] responsiveness is necessary, what approaches could be used for prescreening for e[CO2] responsiveness, and how the data can be used to improve genetic selection of high-performing cultivars. We do this within the framework of understanding the strengths and limitations of genotype–phenotype mapping.

scholarly journals Transoperative refusion: a simple and safe method in emergency surgery

2014 ◽  
Vol 41 (4) ◽  
pp. 292-296
Author(s):  
Luiz Carlos Buarque Gusmão ◽  
Sérgio Henrique Chagas Valoes ◽  
José da Silva Leitão Neto
Keyword(s):  
Cost Benefit ◽  
Blood Transfusions ◽  
Factor V ◽  
West Nile Fever ◽  
Clotting Factors ◽  
Blood Contamination ◽  
Simple Method ◽  
Cost Benefit Ratio ◽  
The Cost ◽  
Selection Of

The objective is to reinforce the importance of blood reinfusion as a cheap, safe and simple method, which can be used in small hospitals, especially those in which there is no blood bank. Moreover, even with the use of devices that perform the collection and filtration of blood, more recent studies show that the cost-benefit ratio is much better when autologous transfusion is compared with blood transfusions, even when there is injury to hollow viscera and blood contamination. It is known that the allogeneic blood transfusion carries a number of risks to patients, among them are the coagulation disorders mediated by excess enzymes in the conserved blood, and deficiency in clotting factors, mainly the Factor V, the proacelerin. Another factor would be the risk of contamination with still unknown pathogens or that are not investigated during screening for selection of donors, such as the West Nile Fever and Creutzfeldt-Jacob, better known as "Mad Cow" disease. Comparing both methods, we conclude that blood autotransfusion has numerous advantages over heterologous transfusion, even in large hospitals. We are not against blood transfusions, just do not agree that the patient's own blood is discarded without making sure there will be enough blood in stock to get him out of the hemorrhagic shock.

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