Yefeng Yang

Yefeng Yang
UNSW Sydney | UNSW · UNSW Data Science Hub, and School of Biological, Earth and Environmental Sciences

PhD

About

27
Publications
5,254
Reads
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290
Citations
Introduction
Yefeng Yang currently works at UNSW, Sydney. Yefeng focuses on synthesis research.
Additional affiliations
July 2021 - present
City University of Hong Kong
Position
  • Research Associate
October 2019 - September 2022
UNSW Sydney
Position
  • Visiting Fellow
Description
  • Evidence Synthesis, Research Weaving, Systematic review, Mixed-effect mode, Meta-analysis, Applied Statistics
June 2017 - March 2021
Zhejiang University
Position
  • PostDoc Position
Description
  • Circadian and Artificial Light, Animal behaviour, Applied statistics
Education
September 2012 - June 2017
Zhejiang University
Field of study
  • Light response of Animal

Publications

Publications (27)
Preprint
Collaborative assessments of direct replicability of empirical studies in the medical and social sciences have exposed alarmingly low rates of replicability, a phenomenon dubbed the ‘replication crisis’. Poor replicability has spurred cultural changes targeted at improving reliability in these disciplines. Given the absence of equivalent replicatio...
Article
Full-text available
Objective: The aim was to detect effects of blue light on reducing the adverse effect of heat stress in thermal manipulation (TM) of broiler embryos by subjecting embryos to heat stress during incubation development. Methods: Eggs were assigned to four treatments in which the TM (thermal manipulation) was exposed to 40°C for 4 h daily during fiv...
Preprint
Recently, Costello and Fox (2022) tested, with a large dataset, the hypothesis of whether there is a widespread decline effect in the discipline of ecology. In other words, the magnitude of the reported ecological effect sizes declines over time (Leimu and Koricheva 2004). Contrary to early results from much smaller datasets (Jennions and Møller 20...
Article
Full-text available
Field studies are essential to reliably quantify ecological responses to global change because they are exposed to realistic climate manipulations. Yet such studies are limited in replicates, resulting in less power and, therefore, unreliable effect estimates. Further, while manipulative field experiments are assumed to be more powerful than non‐ma...
Preprint
Field studies are essential to reliably quantify ecological responses to global change because they are exposed to realistic climate manipulations. Yet such studies are limited in replicates, resulting in less power and, therefore, unreliable effect estimates. Further, while manipulative field experiments are assumed to be more powerful than non-ma...
Article
Full-text available
Publication bias threatens the validity of quantitative evidence from meta‐analyses as it results in some findings being overrepresented in meta‐analytic datasets because they are published more frequently or sooner (e.g., ‘positive’ results). Unfortunately, methods to test for the presence of publication bias, or assess its impact on meta‐analytic...
Preprint
Full-text available
1.Publication bias threatens the validity of quantitative evidence from meta-analyses as it results in some findings being overrepresented in meta-analytic datasets because they are published more frequently or sooner (e.g., ‘positive’ results). Unfortunately, methods to test for the presence of publication bias, or assess its impact on meta-analyt...
Article
Full-text available
Physical exercise not only helps to improve physical health but can also enhance brain development and cognition. Recent reports on parental (both maternal and paternal) effects raise the possibility that parental exercise may provide benefits to offspring through intergenerational inheritance. However, the general magnitude and consistency of pare...
Article
“Classic” forest plots show the effect sizes from individual studies and the aggregate effect from a meta‐analysis. However, in ecology and evolution meta‐analyses routinely contain over 100 effect sizes, making the classic forest plot of limited use. We surveyed 102 meta‐analyses in ecology and evolution, finding that only 11% use the classic fore...
Article
Nighttime lighting is an increasingly important anthropogenic environmental stress on plants and animals. Exposure to unnatural lighting environments may disrupt circadian rhythm. However, studies involved in molecular biology, e.g. disruption of molecular circadian clock by light pollution, always have a small sample sizes. The small sample sizes...
Article
Full-text available
LED has shown great advantages in poultry husbandry. This study focused on the behavioral preferences and production performance of chicken broilers reared under unevenly distributed yellow LED light. Four pens were divided into two groups adopting respective maximum light intensities (MLIs, 60 lx and 30 lx). Because of different distances from the...
Article
Though previous study indicated that the 580 nm-yellow-LED-light showed an stimulating effect on growth of chickens, the low luminous efficiency of the yellow LED light cannot reflect the advantage of energy saving. In present study, the cool white LED chips and yellow LED chips have been combined to fabricate the white × yellow mixed LED light, wi...
Article
Full-text available
Although many experiments have been conducted to clarify the response of broiler chickens to light-emitting diode (LED) light, those published results do not provide a solid scientific basis for quantifying the response of broiler chickens. This study used a meta-analysis to establish light spectral models of broiler chickens. The results indicated...
Article
Full-text available
Light intensity is an important aspect for broiler production. However, previous results do not provide a solid scientific basis for quantifying the response of broilers to light intensity. This study performed a meta-analysis to model the response of broilers to 0.1 − 200 lux of light intensity. Meta-analysis was used to integrate smaller studies...
Article
The average weight and flock uniformity of broilers in group housing is important information that allows producers to know the flock growth conditions and determine the selling time. However, gathering weight information of chickens is not only labor-intensive for humans but also frightening for the birds. In this study, an image-assisted rod-plat...
Article
Full-text available
Light-emitting diode (LED) light sources have high potential for replacing traditional incandescent lamps in broiler production. LEDs with short wavelengths (480 and 560 nm) have been reported to stimulate broiler growth. However , short-wavelength stimuli might also have potential negative effects on husbandry workers, which has restricted the app...
Article
Full-text available
Present study introduced a new method to manipulate broiler chicken growth and metabolism by mixing the growth-advantage LED. We found that the green/blue LED mixed light system (G-B and G × B) have the similar stimulatory effect on chick body weight with single green light and single blue light (G and B), compared with normal artificial light (P =...
Article
Full-text available
Long daylength artificial light exposure associates with disorders, and a potential physiological mechanism has been proposed. However, previous studies have examined no more than three artificial light treatments and limited metabolic parameters, which have been insufficient to demonstrate mechanical responses. Here, comprehensive physiological re...
Article
Full-text available
A previous study demonstrated that birds that are exposed to light at night develop advanced reproductive systems. However, spectrum might also affect the photoperiodic response of birds. The present study was aimed to investigate the effects of spectral composition on the growth and reproductive physiology of female breeders, using pure light-emit...
Data
Full-text available
This study aimed to establish response curves between broiler chicken growth parameters and artificial light periods, as opposed to optimizing a lighting regimen for broiler production. Medium-growing broiler chickens were illuminated for periods of 12, 14, 16, 18, 20, 22, or 24 h each day. The BW of the broilers were significantly influenced by li...
Article
Full-text available
Previous study and our laboratory have reported that short-wavelength (blue and green) light and combination stimulate broiler growth. However, short-wavelength stimuli could have negative effects on poultry husbandry workers. The present study was conducted to evaluate the effects of human-friendly yellow LED light, which is acceptable to humans a...
Article
Full-text available
The important task of replugging bad or missing cells with healthy seedlings in greenhouses is carried out by automatic transplanters. Grippers of such transplanters spend a considerable amount of time shuttling between the source and target trays during replugging. Therefore, work efficiency of transplanters can be significantly improved by tour p...
Article
Full-text available
This study aimed to establish response curves between broiler chicken growth parameters and artificial light periods, as opposed to optimizing a lighting regimen for broiler production. Medium-growing broiler chickens were illuminated for periods of 12, 14, 16, 18, 20, 22, or 24 h each day. The BW of the broilers were significantly influenced by li...
Article
Full-text available
Despite the overwhelming use of artificial light on captive animals, its effect on those animals has rarely been studied experimentally. Housing animals in controlled light conditions is useful for assessing the effects of light. The chicken is one of the best-studied animals in artificial light experiments, and here, we evaluate the effect of poly...

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Projects (2)
Project
Meta-synthesize the big data from Agriculture, Biology, and Environment