Time reversal invariance, T, is well known to hold in quantum electrodynamics. However, it has caused difficulties in classical electrodynamics (CED). These are shown to be conceptual misunderstandings. When corrected: (1) the classical equations of motion of a charge are T invariant despite the explicit occurrence of retarded fields in the equations of motion. (2) Advanced fields violate causality and occur neither in nature nor in the CED that describes it. (3) The nonexistence of advanced fields in nature implies an "arrow of time" for electromagnetic radiation: radiation emission is an overall dissipative phenomenon. This electromagnetic "arrow of time" does not contradict time reversal invariance.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1103/PhysRevE.72.057601 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Rumination Mediates the Relation of Hostile Attribution to Psychological Maladjustment Among Adolescents from Three Countries.
Res Child Adolesc Psychopathol
January 2025
Psychology Department, Federico II Second University of Naples, Naples, Italy.
Addressing global concerns about youth mental health requires understanding longitudinal pathways to psychological maladjustment among diverse youth. Hostile attribution bias (HAB) and hostile rumination (HR) are cognitive vulnerabilities associated with multiple forms of psychological maladjustment among diverse youth. This study longitudinally examined whether HR mediates the relation of HAB to aggression, anxiety, and depression symptoms in a sample of adolescents from three countries.
View Article and Find Full Text PDFChildhood obesity trajectories and adolescent mental health: A UK cohort study.
Pediatr Obes
January 2025
Department of Psychology, Institute of Population Health, University of Liverpool, Liverpool, UK.
Background: There is limited evidence on how changes in obesity from childhood to adolescence are associated with adolescent mental health. We examined the associations between childhood obesity trajectories, obesity episodes, and mental health at age 17.
Methods: Data were from the UK Millennium Cohort Study.
[Effect of separate and combined intake of rutin and hesperidin on the activity and gene expression of cytochrome P450 isoforms 1A and 3A in rat liver].
Vopr Pitan
January 2025
Federal Research Centre of Nutrition, Biotechnology and Food Safety, 109240, Moscow, Russian Federation.
The main molecular mechanisms of the protective effect of minor bioactive compounds (BAC) of food, including rutin and hesperidin, along with antiradical and antioxidant activity, include their interaction with transcription factors modulating the functional state of the organism defense systems, one of which is the system of xenobiotic metabolizing enzymes. However, the data on their combined action are limited. of the research was to study the effect of rutin and hesperidin on the activity and gene expression of cytochrome P450 isoforms 1A and 3A (CYP1A1, CYP1A2, CYP3A) in rat liver at their separate and combined intake.
View Article and Find Full Text PDFImpact of Maternal BPA Exposure during Pregnancy on Obesity in Male Offspring: A Mechanistic Mouse Study of Adipose-Derived Exosomal miRNA.
Environ Health Perspect
January 2025
State Key Laboratory of Reproductive Medicine and Offspring Health, Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing, China.
Background: The widespread use of bisphenol A (BPA) has led to universal exposure among the population, raising concerns about its health effects. Epidemiological studies have linked environmentally relevant levels of BPA exposure to obesity.
Objectives: We aimed to uncover the complex mechanisms by which oral exposure during pregnancy with BPA affects the offspring.
Pooled safety analysis of two phase 3 studies investigating trifluridine/tipiracil plus bevacizumab in patients with metastatic colorectal cancer.
Front Oncol
January 2025
Sorbonne University and Saint-Antoine Hospital, APHP, Paris, France.
Background: Trifluridine/tipiracil (FTD/TPI) is approved as monotherapy and in combination with bevacizumab for the treatment of patients with refractory metastatic colorectal cancer (mCRC). FTD/TPI plus bevacizumab showed good tolerability in the phase 3 SOLSTICE (first-line) and SUNLIGHT (later-line) trials. This pooled analysis was performed to further characterize the safety of FTD/TPI plus bevacizumab and to compare safety in untreated and previously treated patients with mCRC.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!