scholarly journals Determination of Oebalus pugnax (Hemiptera: Pentatomidae) Spatial Pattern in Rice and Development of Visual Sampling Methods and Population Sampling Plans

2008 ◽  
Vol 101 (1) ◽  
pp. 216-225 ◽  
Author(s):  
L. Espino ◽  
M. O. Way ◽  
L. T. Wilson
Keyword(s):  
Spatial Pattern ◽  
Sampling Methods ◽  
Sampling Plans ◽  
Population Sampling ◽  
Visual Sampling ◽  
Oebalus Pugnax

scholarly journals Sequential and Binomial Sampling Plans to Estimate Thrips tabaci Population Density on Onion

Insects ◽  
2021 ◽  
Vol 12 (4) ◽  
pp. 331
Author(s):  
Lauro Soto-Rojas ◽  
Esteban Rodríguez-Leyva ◽  
Néstor Bautista-Martínez ◽  
Isabel Ruíz-Galván ◽  
Daniel García-Palacios
Keyword(s):  
Sampling Methods ◽  
Sequential Sampling ◽  
Thrips Tabaci ◽  
Economic Losses ◽  
Management Approach ◽  
Data Sets ◽  
Sampling Plans ◽  
Binomial Sampling ◽  
Population Sampling ◽  
Use Of Time

Thrips tabaci Lindeman is a worldwide onion pest that causes economic losses of 10–60%, depending on many factors. Population sampling is essential for applying control tactics and preventing damage by the insect. Conventional sampling methods are criticized as time consuming, while fixed-precision binomial and sequential sampling plans may allow reliable estimations with a more efficient use of time. The aim of this work was to develop binomial and sequential sampling for fast reliable estimation of T. tabaci density on an onion. Forty-one commercial 1.0-ha onion plots were sampled (sample size n = 200) to characterize the spatial distribution of T. tabaci using Taylor’s power law (a = 2.586 and b = 1.511). Binomial and sequential enumerative sampling plans were then developed with precision levels of 0.10, 0.15 and 0.25. Sampling plans were validated with bootstrap simulations (1000 samples) using 10 independent data sets. Bootstrap simulation indicated that precision was satisfactory for all repetitions of the sequential sampling plan, while binomial sampling met the fixed precision in 80% of cases. Both methods reduced sampling time by around 80% relative to conventional sampling. These precise and less time-consuming sampling methods can contribute to implementation of control tactics within the integrated pest management approach.

scholarly journals Determination of occupational anxiety levels of teacher candidates studying in a different departmentsFarklı bölümlerde öğrenim gören öğretmen adaylarının mesleki kaygı düzeylerinin belirlenmesi

2018 ◽  
Vol 15 (4) ◽  
pp. 2168
Author(s):  
Duygu Harmandar Demirel ◽  
Emrah Serdar ◽  
Mehmet Demirel
Keyword(s):  
Prospective Teachers ◽  
Teacher Candidates ◽  
Sampling Methods ◽  
Personal Information ◽  
English Summary ◽  
Teaching Profession ◽  
Significant Difference ◽  
Research Findings ◽  
Anxiety Levels

The aim of this study is to determine the anxiety levels of the students studying in the teaching departments and to examine these according to different variables. The sample of the study consisted of 400 non-random sampling methods and 400 prospective teachers who were studying at Dumlupinar University. The personal information form created by the researchers and the data related to the pre-service teachers' concerns about the teaching profession were provided by Caba and Yalçınalp (2009). In the research findings: “Gender”, “Age”, “Satisfaction Status”, “Class”, “Faculty” and “Sports Making Status” showed a significant difference in “OAST” total scores (p <0.05). As a result, it can be concluded that the vocational anxiety levels of the teacher candidates studying in different departments differ according to some variables.Extended English summary is in the end of Full Text PDF (TURKISH) file. ÖzetBu araştırma ile öğretmenlik bölümlerinde okuyan öğrencilerinin mesleğe yönelik kaygı düzeylerini belirlemek ve bunu farklı değişkenlere göre incelemektir. Araştırmanın örneklemini seçkisiz olmayan örnekleme yöntemlerinden uygun örnekleme yoluyla seçilen ve Dumlupınar Üniversitesinde öğrenim görmekte olan 400 öğretmen adayı oluşturmaktadır. Çalışmada oluşturulan demografik bilgi formu ve öğretmen adaylarının öğretmenlik mesleğine yönelik kaygılarına ilişkin veriler Cabı ve Yalçınalp (2009) tarafından geliştirilen Öğretmen Adaylarına Yönelik Mesleki Kaygı Ölçeği (ÖAYMK) ile sağlanmıştır. Verilerin analizinde; betimsel istatistik yöntemler, Man Whitney U ve Kruskal Wallis testlerinden faydalanılmıştır. Araştırma bulgularında: “Cinsiyet”, “Yaş”, “Okuduğu Bölümden Memnun Olma Durumu”, “Sınıf”, “Fakülte” ve “Spor Yapma Durumu” göre “ÖAYMK” toplam puanlarında manidar farklılık bulunmuştur. Araştırmaya gore, öğretmen adaylarının meslekleri ile ilgili kaygı seviyelerinin değişkenlere göre farklılaştığı sonucuna varılabilir.

scholarly journals Comparison of sampling methods for animal manure

1997 ◽  
Vol 45 (1) ◽  
pp. 65-79 ◽  
Author(s):  
P.J.L. Derikx ◽  
N.W.M. Ogink ◽  
P. Hoeksma
Keyword(s):  
Nitrogen Content ◽  
Human Activity ◽  
Total Phosphorus ◽  
Sampling Methods ◽  
Animal Manure ◽  
Practical Reasons ◽  
Sample Quality ◽  
Transport Vehicle

Currently available and recently developed sampling methods for slurry and solid manure were tested for bias and reproducibility in the determination of total phosphorus and nitrogen content of samples. Sampling methods were based on techniques in which samples were taken either during loading from the hose or from the transport vehicle after loading. Most methods were unbiased. New sampling methods for slurry from the hose were substantially more reproducible than existing methods. For practical reasons, the mechanization of sampling is desirable, and to minimize the influence of human activity on sample quality, the automation of sampling is advisable.

The breed structure and genetic analysis of the pedigree cattle breeds in Australia

1957 ◽  
Vol 8 (5) ◽  
pp. 561 ◽  
Author(s):  
JSF Barker
Keyword(s):  
Genetic Improvement ◽  
Sampling Methods ◽  
Genetic Contribution ◽  
Genetic History ◽  
Effective Generation ◽  
History Of ◽  
Four Levels ◽  
Relationship Of

(i) The breed structure and genetic history of the pedigree Jersey breed in Australia are analysed by pedigree sampling methods. (ii) The breed structure may be divided into four levels, with imported animals at the top determining the genetic make-up of the breed. Animals imported since 1900 have made a genetic contribution to the breed in 1950 of 61.8 per cent. At least two substructures exist within the breed, based respectively on the major herds in Queensland and those in the rest of Australia. (iii) The genetic contribution to the breed of the most important of the herds is only 7.0 per cent. (iv) Determination of the percentage direct relationship of important animals in five sample years shows that no one animal has made a major contribution to the genotype of the breed. (v) The degree of inbreeding (base year 1900) is calculated. The total inbreeding in 1950 (4.19 per cent.) comprises 1.31 per cent. current inbreeding, 0.51 per cent. long-term inbreeding, and 2.37 per cent. strain inbreeding. The index of subdivision calculated from the non-current and long-term inbreeding is 5.65, indicating that the breed is subdivided into strains. (vi) The effective generation length for each of the pedigree breeds – Jersey, Australian Illawarra Shorthorn, Friesian, Ayrshire, and Guernsey – in Australia is 5 years. Most bulls are used when they are 1-3 years old, and are then lost to the pedigree industry. It is shown that the bull requirements of the above breeds could be met by the progeny of performance-recorded animals. Whether this would increase the rate of genetic improvement is discussed briefly. (vii) Genetic improvement in the Jersey breed could best be achieved by: ( a ) stopping further importation; ( b ) closing the breed in each environment and concentrating selection within these regions to develop strains adapted to each particular environment; ( c ) selecting on production records rather than using genetically unknown sires and dams, particularly in the major breeders' herds.

scholarly journals PENENTUAN PRIORITAS PENINGKATAN KUALITAS JASA DENGAN MENGGUNAKAN METODE IMPORTANCE-PERFORMANCE ANALYSIS (IPA) DAN INDEKS POTENTIAL GAIN CUSTOMER VALUE (PGCV)

2021 ◽  
Vol 23 (2) ◽  
pp. 352
Author(s):  
Nur Hakim Arifianto ◽  
Sauptika Kancana ◽  
Adi Soeprapto
Keyword(s):  
Customer Value ◽  
Sampling Methods ◽  
Spare Parts ◽  
Quality Of Services ◽  
Repair Shop ◽  
Potential Gain ◽  
Margin Of Error ◽  
And Performance

The purpose of the research is (1) analyzing the level of conformity betweenexpectations (importance) customer and performance (performance) of the company against the quality of services provided by Yamaha Motorcycle repair shop (2) Determine the priority Quality improvement based on the level of conformity and index of Potential Gain Customer Value (PGCV) to improve the quality of services provided by Yamaha Motorcycle repair shop. The population in this research is a customer Yamaha Motorcycle repair shop Demangan Yogyakarta for approximately arround 2 months April 2019 till June 2019.Determination of the number of samples will be determined by the level of Confidance 95% and margin of error is 10% then obtained the number of samples as many as 98 people. The sampling techniques used in this study were based on Non Probabiliy Sampling methods using the Accidental Sampling approach.The results showed that (1) the level of conformity between expectations (importance) of the customer and performance (performance) of the company against the quality of services provided by the Yamaha Motorcycle repair shop Demangan Yogyakarta has an average level of conformity Below 100% of which is 88.30%. 88.30% means the company lacks or does not fulfill what is considered important by the customer and the service has not beensatisfactory; (2) Priority of improvement of service quality (top priority in the Quadrant A IPA diagram with index PGCV) namely: 1) Workshop Yamaha new source Motor Demangan has a complete spare parts, 2) equipment used Yamaha Workshop new source Demangan complete, 3) Employees Yamaha Motorcycle repairshop Demangan tell the customers when the service is certainly motorbike will be delivered, 4) Employees Yamaha Motorcycle repair shop Demangan always ready in responding to customer demand, 5) Mechanics workshop Yamaha Motorcycle repair shop Demangan fast In servicing motorcycles, 6) Employees Yamaha Motorcycle repair shop Demangan always able to answer questions related to Yamaha motorcycles, 7) Employees Yamaha Motorcycle repair shop Demangan always prioritize the expectations of customers.

scholarly journals DETERMINATION OF THE ASSESSMENT ON INCREASING THE SEISMOSTICITY OF BRICK LAYING OF BUILDINGS AND STRUCTURES WITH DAMAGES AND DEFECTS

2021 ◽  
pp. 41-50
Author(s):  
Serhii Andrukh ◽  
Alexander Telichenko
Keyword(s):  
Stress State ◽  
Sampling Methods ◽  
Entire System ◽  
Public Buildings ◽  
Performance Properties ◽  
Standard Methods ◽  
Entire Height ◽  
Operational Factors

The article uses a method of research and determination of damage and defects ofstone structures. This method provides elimination: the presence of cracks, their length, and width ofthe opening, the presence of defects in the brickwork, the presence of erosion in the brickwork, thedisplacement of arched and arched bridges.To assess the strength of bricks and mortar in masonry, the proposed method was as follows.Places for drilling in brickwork were chosen arbitrarily along with the entire height of the masonry.Drilling was performed perpendicular to the brickwork. The number of places required for drillingcorresponded to the number of samples tested for compression, according to the normative document.To determine the performance properties of brickwork, by following per under regulations in acomplete inspection of buildings, sampling methods used a large number of studies. This problem isespecially relevant for brick buildings to the defects and damages of constructive characterestablished during the inspection which accounting by standard methods does not provide necessaryreliability.The task is complicated if the structure, under the influence of certain operational factors, therewas a change in its stress state, which cannot be estimated by calculation. The structural elementselected for inspection is responsible, which in turn will lead to the destruction of the redistributionof forces and will be dangerous, which can lead to the destruction of other elements and the collapseof the entire system of structures. In this situation, it is recommended to adopt a method that allowsyou to experimentally determine the actual level of stress of the whole element or its individual part.The method was developed primarily for old residential and public buildings (architecturalmonuments) and helps to preserve the original appearance of structures, which does not violate thearchitectural ensemble of the whole house.

scholarly journals Hubungan Resiko Ergonomi dengan Kejadian Musculosceletal Disorder pada Pengguna Laboratorium Teknologi Pertanian Universitas X

2017 ◽  
Vol 1 (1) ◽  
pp. 30
Author(s):  
Sisca Mayang Phuspa
Keyword(s):  
Sampling Methods ◽  
Statistical Tests ◽  
Agricultural Technology ◽  
Practice Research ◽  
Scoring Methods ◽  
Laboratory Facilities ◽  
Safety And Health ◽  
Study Population ◽  
The Relationship

Activities in the lab include the practice, research, and experimentation have its health risks (ergonomic disorder) unconciously.This Research was conducted on 56 respondents (including students, lecturer and laboratory) at the Agricultural Technology Laboratory of University X at April 2016. This study used surveys and observations by weighting and scoring methods for risk analysis and statistical tests to determine the relationship between the level of risk with Ergonomic events Disorder (Musculoskeletal Disorders) using coefficient of contingency. Determination of respondents using total sampling methods. The results showed that 55.4% of the study population activities in laboratories have high risk and moderate 44.6% for others. On the other variables, it’s known to have 43% of the study population experienced ergonomic disorder symptoms and 57% did not. The results of statistical analysis showed a relationship with a correlation coefficient of 0.26. The conclusion of this study is that the unergonomical behavior caused ergonomic disorder in the laboratory of Agricultural Technology, University X and it is caused by the lack of laboratory facilities and lack of socialization of safety and health laboratory.

scholarly journals Assessment of sampling methods about level of mercury in fish

2019 ◽  
Vol 8 (3) ◽  
Author(s):  
Cesare Ciccarelli ◽  
Melina Leinoudi ◽  
Angela Marisa Semeraro ◽  
Vittoria Di Trani ◽  
Giuseppe Angelozzi ◽  
...  
Keyword(s):  
Probability Theory ◽  
Probabilistic Model ◽  
Sampling Methods ◽  
Statistical Significance ◽  
Analysis Method ◽  
Population Sampling ◽  
Mercury In Fish ◽  
Fishery Products ◽  
Fish And Fishery Products ◽  
The Relationship

Mercury (Hg) seriously affects some sensitive subgroups of population and the detection of Hg content in fish and fishery products is one of the most important activities aimed at controlling their safety. In fact, Regulation (EC) No 1881/2006 set maximum levels for certain contaminants in foodstuffs and Regulation (EC) No 333/2007 laid down the methods of sampling and analysis for their control in foodstuffs. As Hg content highly varies among different fish species depending on a variety of factors and even among members of the same population, sampling methods play a crucial role in the accuracy, precision and statistical significance of Hg determination. By the use of an analysis method independent probabilistic model, based on the axioms of Kolmogorov’s probability theory, this paper aims to assess the relationship between sampling methods set by Regulation (EC) No 333/2007 and the probability to detect compliant or non-compliant outcomes of Hg in fish.

Sign in / Sign up

Export Citation Format

Share Document