Daniel J. Robertson

ORCID: 0000-0003-1089-0249
Publications
Citations
Views
---
Saved
---
About
Contact & Profiles
Research Areas
  • Crop Yield and Soil Fertility
  • Agronomic Practices and Intercropping Systems
  • Bioenergy crop production and management
  • Genetics and Plant Breeding
  • Tree Root and Stability Studies
  • Wheat and Barley Genetics and Pathology
  • Soil Mechanics and Vehicle Dynamics
  • Soil Management and Crop Yield
  • Neurotransmitter Receptor Influence on Behavior
  • Plant Surface Properties and Treatments
  • Wireless Power Transfer Systems
  • X-ray Diffraction in Crystallography
  • Intestinal Malrotation and Obstruction Disorders
  • Forest Biomass Utilization and Management
  • Crystallization and Solubility Studies
  • Genetic Mapping and Diversity in Plants and Animals
  • Congenital gastrointestinal and neural anomalies
  • Neuroscience and Neuropharmacology Research
  • Elasticity and Material Modeling
  • Acoustic Wave Resonator Technologies
  • Organometallic Compounds Synthesis and Characterization
  • Advanced Battery Technologies Research
  • Agricultural Engineering and Mechanization
  • Receptor Mechanisms and Signaling
  • Energy Harvesting in Wireless Networks

Illinois College
2019-2025

Children's Hospital of Illinois
2019-2025

University of Idaho
2017-2024

University of Illinois Chicago
2023-2024

OSF HealthCare
2023

University of California, Berkeley
2020

University of Utah
2020

Missouri State University
2004-2020

OSF Saint Francis Medical Center
2019

New York University Abu Dhabi
2014-2017

This paper presents a new type of series ac-processing pickup used in inductive-power-transfer applications. The proposed uses an ac switch operating under zero-current-switching conditions with resonant network to produce controllable voltage source suitable for driving incandescent lights. When rectifier is cascaded onto this pickup, it can also precisely controlled dc voltage. topology eliminates the need use extra buck converter after traditional controlling output load desired value,...

10.1109/tpel.2010.2052069 article EN IEEE Transactions on Power Electronics 2010-06-14

An incomplete understanding of stalk strength and lodging impedes efforts to improve maize ( Zea mays L.) production. To develop a more complete strength, the current study examined effect morphology on bending strength. A detailed geometric analysis was conducted five varieties dent corn sown at planting densities in two replicates each locations near Greenville, IA, 2013. Stalks were imaged using high‐resolution X‐ray computed tomography, morphological features quantified customized...

10.2135/cropsci2016.07.0569 article EN cc-by-nc-nd Crop Science 2017-02-16

Stalk lodging in maize results substantial yield losses worldwide. These could be prevented through genetic improvement. However, breeding efforts and genetics studies are hindered by lack of a robust economical phenotyping method for assessing stalk resistance. A field-based platform that induces failure patterns consistent with natural events measures bending strength field-grown plants was recently developed. Here we examine the association between data gathered from this new counts...

10.1016/j.fcr.2020.107737 article EN cc-by-nc-nd Field Crops Research 2020-02-05

Stalk lodging is the structural failure of crops due to external loading such as wind. Short-stature (i.e., dwarf) varieties wheat and rice have shown promise in reducing rates. However, similar dwarfing large gains like maize sorghum has typically been accompanied by undesirable commercial characteristics, including significantly decreased grain yields. The purpose this paper quantify relationship between resistance plant height better understand potential impact short-stature on...

10.1016/j.fcr.2023.109008 article EN cc-by Field Crops Research 2023-06-19

Additive manufacturing of composites composed wood residues and ecofriendly binders such as sodium silicate could reduce the carbon footprint construction industry. In this paper spatially varying mechanical behavior a single layer 3D-printed wood-sodium composite with 50:50 wt.% known PrinTimber was investigated. Flexural testing revealed outer edges printed material exhibited greater strength compared to inner regions same sample. Furthermore, tensile tests demonstrated that longitudinal...

10.54113/j.sust.2025.000063 article EN cc-by Sustainable Structures 2025-02-01

ABSTRACT Stalk lodging is essentially a structural failure. It was therefore hypothesized that application of and forensic engineering principles would provide novel insights into the problem late‐season stalk maize ( Zea mays L.). This study presents results from failure analysis corn lodging, involving detailed inspection measurements lodged stalks multidimensional imaging to assess architecture based on principles. work involved in‐field observation >20 varieties in eight international...

10.2135/cropsci2015.01.0010 article EN cc-by-nc-nd Crop Science 2015-09-25

ABSTRACT Weak stems or stalks in grass crop species increase the likelihood of stalk failure, thereby reducing yield. Three‐point bending tests are often employed selective breeding studies to characterize strength. However, it is hypothesized that loading setup used during three‐point experiments may significantly alter test results. To investigate this hypothesis, two different configurations were conducting corn (Zea mays L.) stalks. In first configuration, loaded and supported at nodes....

10.2135/cropsci2013.11.0794 article EN cc-by-nc-nd Crop Science 2014-07-18

Late‐season stalk lodging in maize ( Zea mays L.) is a major agronomic problem that has far‐reaching economic ramifications. More rapid advances resistance could be achieved through development of selective breeding tools are not confounded by environmental factors. It was hypothesized measurements flexural stiffness (a mechanical measurement inspired engineering beam theory) would stronger predictor strength than current technologies. Stalk stiffness, rind penetration and bending were...

10.2135/cropsci2015.11.0665 article EN cc-by-nc-nd Crop Science 2016-05-27

The hypothetical ideal for maize (Zea mays) bioenergy production would be a no-waste plant: high-yielding, with silage that is easily digestible conversion to biofuel. However, increased digestibility typically associated low structural strength and propensity lodging. solution this dilemma may lie in our ability optimize morphology using tools from engineering. To investigate how material (tissue) geometric (morphological) factors influence stalk strength, detailed models of the were...

10.1093/jxb/erv108 article EN Journal of Experimental Botany 2015-03-30

Stalk lodging is a serious challenge in the production of maize and sorghum. A comprehensive understanding will likely require accurate characterizations mechanical properties such plants. One most important for structural analysis bending modulus elasticity. The purpose this study was to measure elasticity dry, mature rind tissues using three different loading modes (bending, compression tensile), determine accuracy reliability each test method.The testing produced comparable elastic...

10.1186/s13007-018-0279-6 article EN cc-by Plant Methods 2018-02-08

• Premise of the study: Reliable testing methodologies are a fundamental tenet scientific research. However, very little information is found in literature explaining how to accurately measure structural bending strength plant stems. It was hypothesized that most commonly employed loading configuration used experiments (placement anvil at an internodal region stem or stalk) may significantly alter test results and introduce errors measurements Methods: Four types mechanical tests were...

10.3732/ajb.1400183 article EN American Journal of Botany 2014-12-16

Chronic cocaine use elicits changes in the pattern of gene expression within reinforcement‐related, dopaminergic regions. cDNA hybridization arrays were used to illuminate cocaine‐regulated genes nucleus accumbens (NAcc) non‐human primates ( Macaca fascicularis; cynomolgus macaque), treated daily with escalating doses over one year. Changes seen mRNA levels by array analysis confirmed at level protein via specific immunoblots). Significantly up‐regulated included: kinase A α catalytic...

10.1046/j.1471-4159.2001.00252.x article EN Journal of Neurochemistry 2001-04-15

Stalk lodging (breakage of plant stems prior to harvest) is a major problem for both farmers and breeders. A limiting factor in addressing this the lack reliable method phenotyping stalk strength. Previous methods strength induce failure patterns different from those observed natural events. This paper describes new device field-based called "DARLING" (device assessing resistance grains). The DARLING apparatus consists vertical arm which connected horizontal footplate by hinge. operator...

10.1186/s13007-019-0488-7 article EN cc-by Plant Methods 2019-09-03

The chemical composition of grain stalks has been extensively studied and long assumed to have a major influence on stalk lodging. However, much less attention given the architecture (i.e. physical features anatomy morphology). We show in this study that is far more influential bending strength (a common measure lodging resistance) than composition. This insight was obtained through novel combination structural engineering principles plant-by-plant experimental design using two species...

10.1016/j.biosystemseng.2022.04.010 article EN cc-by-nc-nd Biosystems Engineering 2022-05-17

Virtual reality modeling (VRM) is a 3-dimensional (3D) simulation. It powerful tool and has multiple uses applications in pediatric surgery. Patient-specific 2-dimensional imaging can be used to generate virtual model, which improve anatomical perception understanding, aid preoperative planning for complex operations. VRM also realistic training proven effective distraction patients experiencing pain and/or anxiety. We detail the technical requirements process required generation,...

10.1016/j.sempedsurg.2024.151387 article EN cc-by Seminars in Pediatric Surgery 2024-01-12

The current research examines the structural bending performance of additive manufactured wood-sodium silicate composite beams various span-to-height proportions. Beams consisting both a single layer as well two layers extruded were considered. Both groups exhibited rise in maximum shear force (Vmax), moment (Mmax), apparent modulus elasticity (MOEapp), and rupture (MOR) when proportions rose. However, amount stress (τmax) decreased proportion increased. Furthermore, flexural patterns for 6...

10.54113/j.sust.2024.000054 article EN cc-by Sustainable Structures 2024-12-01

BACKGROUND AND OBJECTIVES Diagnosis of adnexal torsion is challenging due to variable clinical presentations and often inconclusive imaging results. We hypothesized that diagnostic delays are common, leading prolonged ischemia subsequent tissue loss. aimed identify factors associated with in pediatric patients torsion. METHODS performed a multi-institutional retrospective review females aged 5 18 years confirmed between 2013 2022. Delay care was defined as prior emergency department...

10.1542/peds.2024-068204 article EN PEDIATRICS 2025-02-19

The compressional modulus of elasticity is an important mechanical property for understanding stalk lodging, but this rarely available thin-walled plant stems such as maize and sorghum because excised tissue samples from these plants are highly susceptible to buckling. purpose study was develop a testing protocol that provides accurate reliable measurements the compressive rind pith-filled stems. general approach relying upon standard methods practices much possible, while developing new...

10.1186/s13007-017-0250-y article EN cc-by Plant Methods 2017-11-09

Abstract Background Stalk lodging (breaking of agricultural plant stalks prior to harvest) results in millions dollars lost revenue each year. Despite a growing body literature on the topic stalk lodging, structural efficiency maize has not been investigated previously. In this study, we investigate morphology mature determine if rind tissues, which are major load bearing component corn stalks, efficiently organized withstand wind induced bending stresses that cause lodging. Results 945...

10.1186/s13007-020-00608-2 article EN cc-by Plant Methods 2020-05-12

Abstract Background Stalk lodging (breaking of agricultural plant stalks prior to harvest) is a multi-billion dollar year problem. occurs when bending moments induced by combination external loading (e.g. wind) and self-loading the plant’s own weight) exceed stalk strength stems. Previous studies have investigated plants as separate independent phenomena. However, these two types are highly interconnected mutually dependent. The purpose this paper twofold: (1) investigate combined effect...

10.1186/s13007-020-00670-w article EN cc-by Plant Methods 2020-09-21
Coming Soon ...