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Selection bias
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Part 1 of ebook "Understanding machine learning: From theory to algorithms" provides readers with contents including: foundations; from theory to algorithms; a formal learning model; learning via uniform convergence; the bias-complexity tradeoff; linear predictors; model selection and validation; convex learning problems; support vector machines; multiclass, ranking, and complex prediction problems;...
284p
tieulangtran
28-09-2023
7
3
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Continued part 1, part 2 of ebook "Advances in quantitative analysis of finance and accounting (Volume 6)" has presents the following content: intraday volume — volatility relation of the DOW - a behavioral interpretation; the pricing of initial public offerings - an option approach; determinants of winner–loser effects in national stock markets; earnings management in corporate voting - evidence from antitakeover charter amendments; deterministic portfolio selection models, selection bias, and an unlikely hero;...
137p
dieptieuung
20-07-2023
8
2
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One promise of nationwide adoption of electronic health records (EHRs) is the availability of data for large-scale clinical research studies. However, because the same patient could be treated at multiple health care institutions, data from only a single site might not contain the complete medical history for that patient, meaning that critical events could be missing.
8p
visteverogers
24-06-2023
6
2
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Determine whether women and men differ in volunteering to join a Research Recruitment Registry when invited to participate via an electronic patient portal without human bias. This supports the view that historical under-representation of women in clinical studies is likely due, at least in part, to implicit bias in offering participation.
11p
visteverogers
24-06-2023
2
2
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Collider bias is a common threat to internal validity in clinical research but is rarely mentioned in informatics education or literature. Conditioning on a collider, which is a variable that is the shared causal descendant of an exposure and outcome, may result in spurious associations between the exposure and outcome.
7p
vighostrider
25-05-2023
6
2
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Descendants from the extinct aurochs (Bos primigenius), taurine (Bos taurus) and zebu cattle (Bos indicus) were domesticated 10,000 years ago in Southwestern and Southern Asia, respectively, and colonized the world undergoing complex events of admixture and selection.
10p
vinarcissa
21-03-2023
6
1
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The phenomenon of codon usage bias is known to exist in many genomes and is mainly determined by mutation and selection. Codon usage bias analysis is a suitable strategy for identifying the principal evolutionary driving forces in different organisms.
12p
vihagrid
30-01-2023
11
3
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The Phenomenon of codon usage bias exists in the genomes of prokaryotes and eukaryotes. The codon usage pattern is afected by environmental factors, base mutation, gene fow and gene expression level, among which natural selection and mutation pressure are the main factors. The study of codon preference is an efective method to analyze the source of evolutionary driving forces in organisms.
10p
vihagrid
30-01-2023
10
3
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Giáo trình Chế bản sách báo (Nghề: Thiết kế đồ họa - Trung cấp) được biên soạn nhằm giúp học viên nắm được các kiến thức về chế bản các loại sách, báo, tạp chí và một số loại sách nhỏ. Giáo trình được chia thành 2 phần, phần 1 trình bày những nội dung về: chế bản các loại bìa sách; tạo lập chế bản bìa sách bằng các khung văn bản và đồ họa; nhập và soạn văn bản;... Mời các bạn cùng tham khảo!
52p
hayatogokudera
18-07-2022
21
7
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With the aim of obtaining more uniformity and quality in the treatment of corpus uteri cancer in Belgium, the EFFECT project has prospectively collected detailed information on the real-world clinical care offered to 4063 Belgian women with primary corpus uteri cancer
13p
visusanwojcicki
28-06-2022
10
2
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The patterns of gene expression on highly differentiated sex chromosomes differ drastically from those on autosomes, due to sex-specific patterns of selection and inheritance. As a result, X chromosomes are often enriched in female-biased genes (feminization) and Z chromosomes in male-biased genes (masculinization).
17p
vigalileogalilei
27-02-2022
11
1
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Most amino acids are encoded by multiple synonymous codons. However, synonymous codons are not used equally, and this biased codon use varies between different organisms. It has previously been shown that both selection acting to increase codon translational efficiency and selection acting to decrease codon biosynthetic cost contribute to differences in codon bias.
11p
vigalileogalilei
27-02-2022
19
1
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Distinguishing the driver mutations from somatic mutations in a tumor genome is one of the major challenges of cancer research. This challenge is more acute and far from solved for non-coding mutations. Here we present OncodriveFML, a method designed to analyze the pattern of somatic mutations across tumors in both coding and non-coding genomic regions to identify signals of positive selection, and therefore, their involvement in tumorigenesis.
13p
viaristotle
29-01-2022
9
0
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Genomes are composed of long strings of nucleotide monomers (A, C, G and T) that are either scavenged from the organism’s environment or built from metabolic precursors. The biosynthesis of each nucleotide differs in atomic requirements with different nucleotides requiring different quantities of nitrogen atoms.
15p
viaristotle
29-01-2022
34
0
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Most research articles presenting new data analysis methods claim that “the new method performs better than existing methods,” but the veracity of such statements is questionable. Our manuscript discusses and illustrates consequences of the optimistic bias occurring during the evaluation of novel data analysis methods, that is, all biases resulting from, for example, selection of datasets or competing methods, better ability to fix bugs in a preferred method, and selective reporting of method variants.
8p
viarchimedes
26-01-2022
7
0
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Selective outcome reporting in clinical trials introduces bias in the body of evidence distorting clinical decision making. Trial registration aims to prevent this bias and is suggested by the International Committee of Medical Journal Editors (ICMJE) since 2004.
10p
vidietmarhopp
29-12-2021
7
0
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The findings show that college and university graduates outperform high school counterparts in terms of high-quality labour market outcomes, such as having higher wages and better employment protection, though the mere stance of being employed does not differ markedly among these graduate cohorts. The paper contributes to recent debates on higher education in a developing country like Vietnam, where the focus is on whether the move towards mass higher education might result in differed labour market outcomes for recent graduates.
19p
huyetthienthan
23-11-2021
6
0
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Viruses undergo extensive evolutionary selection for efficient replication which effects, among others, their codon distribution. In the current study, we aimed at understanding the way evolution shapes the codon distribution in early vs. late viral genes in terms of their expression during different stages in the viral replication cycle. To this end we analyzed 14 bacteriophages and 11 human viruses with available information about the expression phases of their genes.
10p
vilarryellison
29-10-2021
7
1
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The low cost and rapidity of microsatellite analysis have led to the development of several markers for many species. Because in non-invasive genetics it is recommended to genotype individuals using few loci, generally a subset of markers is selected. The choice of different marker panels by different research groups studying the same population can cause problems and bias in data analysis.
18p
vitzuyu2711
29-09-2021
10
1
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The sample ascertainment bias due to complex population structures remains a major challenge in genome-wide investigations of complex traits. In this study we derived the high-resolution population structure and levels of autozygosity of 377 Lipizzan horses originating from five different European stud farms utilizing the SNP genotype information of the high density 700 k Affymetrix Axiom™ Equine genotyping array.
17p
visilicon2711
20-08-2021
6
1
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