We study solutions to second-harmonic-generation equations in two-dimensional media with anomalous dispersion. The analytical solution is obtained in an approximate form of the planar spatiotemporal two-component soliton by means of the averaged Lagrangian method. It is shown that a decrease in the amplitudes of both soliton components and an increase in the value of the transverse coordinate are accompanied by an increase in their temporal duration. Within this variational approach, we have managed to find a stability criterion for the light bullet and a period of oscillations of soliton parameters. Then, we use the obtained form as an initial configuration to carry out the direct numerical simulation of soliton dynamics. We demonstrate stable propagation of spatiotemporal solitons undergoing small oscillations predicted analytically for a long distance. The formation of a two-component light bullet is shown when we launch a pulse only at the fundamental frequency. In addition, we investigate the phase and group-velocity mismatch effects on the propagation of pulses.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1103/PhysRevE.96.022208 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Exploring the Performance of ChatGPT in an Orthopaedic Setting and Its Potential Use as an Educational Tool.
JB JS Open Access
November 2024
Department of Orthopaedic Surgery, Mount Sinai, New York, New York.
Introduction: We assessed ChatGPT-4 vision (GPT-4V)'s performance for image interpretation, diagnosis formulation, and patient management capabilities. We aim to shed light on its potential as an educational tool addressing real-life cases for medical students.
Methods: Ten of the most popular orthopaedic trauma cases from OrthoBullets were selected.
Pectin Edible Films Filled with Concentrate Extract and Its Characterization.
Polymers (Basel)
November 2024
Faculty of Engineering, Federal University of Grande Dourados, Dourados 79825-070, MS, Brazil.
(IP) extract was added to prepare edible films using a central rotational composite design (CCRD) 2 with IP extract and sorbitol concentrations as variables. The IP extract was characterized by color parameters, total phenolic content, caffeine, flavonoids, and chlorophyll content, and antioxidant activity and the edible films were assessed for the same analysis and thickness, water vapor permeability (WVP), solubility in water, fluorescence, photodegradation and UV/Vis light barrier, FT-IR, thermogravimetry, and differential exploratory colorimetry. Sorbitol increased thickness and WVP, while the extract influenced the concentration of phenolic compounds in the films.
View Article and Find Full Text PDFRealization of Airy pattern acoustic bullets by depth of focus synthesis.
J Acoust Soc Am
November 2024
Department of Biomedical Engineering, the Fourth Affiliated Hospital of School of Medicine, and International School of Medicine, International Institutes of Medicine, Zhejiang University, Yiwu 322000, China.
Energy concentration is a key parameter for the characterization of light or acoustic bullets. To the best of our knowledge, the highest encircled-energy ratio in the mainlobe reported is merely 25% for the solitary bullet waves and 30% for the nonsolitary bullet waves. This letter reports experimentally and theoretically on a new family of acoustic bullets, namely, Airy pattern ultrasonic bullets, realized by the depth of focus synthesis.
View Article and Find Full Text PDF'I can feel sad about it and I can worry, but inside I know everything happens for a reason': personal experiences in the aftermath of the March 15 Christchurch mosque attacks.
BJPsych Open
October 2024
Department of Psychological Medicine, University of Otago Christchurch, New Zealand.
Background: On 15 March 2019, a white supremacist gunman sequentially attacked two mosques in Christchurch, New Zealand, killing 51 people aged from 3 to 77 years and bullet-injuring 40 more. Approximately 250 people survived the atrocity, and many more family and community members have been directly or indirectly affected.
Aim: To develop an understanding of the personal experiences of some of those affected, including effects on daily life and well-being, in the 18-30 months following the attacks.
Traumatic injury of the left anterior descending coronary artery with fistula to the right ventricular outflow tract postgunshot wound.
Radiol Case Rep
December 2024
Department of Radiology, University of California, Davis, USA.
Article Synopsis
- Coronary artery fistulas (CAF) are uncommon connections between coronary arteries and nearby vessels or heart chambers, highlighted in a case involving a 47-year-old male with severe gunshot wounds to the chest and abdomen.
- The patient sustained a through-and-through bullet wound to the heart, leading to the discovery of a CAF between the left anterior descending artery (LAD) and the right ventricular outflow tract (RVOT) during diagnostic imaging.
- Approximately three years post-injury, the patient shows symptoms of heart failure, indicating potential complications from the CAF, emphasizing the need for greater awareness among healthcare professionals regarding this condition.
Want 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!