A main challenge in Heat-Assisted Magnetic Recording technology is the build-up of contaminants called smear on the near field transducer. In this paper, we investigate the role of optical forces originating from the electric field gradient in the formation of smear. First, based on suitable theoretical approximations, we compare this force with air drag and the thermophoretic force in the head-disk interface for two smear nanoparticle shapes. Then, we evaluate the force field's sensitivity to the relevant parameter space. We find that the smear nanoparticle's refractive index, shape, and volume significantly impact the optical force. Further, our simulations reveal that the interface conditions, such as spacing and the presence of other contaminants, also influence the magnitude of the force.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10213023 | PMC |
| http://dx.doi.org/10.1038/s41598-023-35126-3 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Unravelling the Unseen: A Case Series Exploring the Enigmas of Traumatic Optic Neuropathy.
Cureus
December 2024
Department of Ophthalmology, Sir Takhtasinhji General Hospital, Bhavnagar, IND.
Traumatic optic neuropathy (TON) is a rare condition resulting from damage to the optic nerve due to craniofacial trauma. It can present as direct or indirect injuries, with mechanisms ranging from mechanical disruption by fractures in direct TON to transmitted forces causing shearing and ischemia in indirect TON. These injuries often lead to significant visual impairment or complete vision loss, requiring timely diagnosis and intervention.
View Article and Find Full Text PDFFurther Insights into the Mechanisms and Clinical Implications of Run-Mu-Ling Granules in Dry Eye Disease [Letter].
J Inflamm Res
January 2025
Department of Ophthalmology, Dalian Women and Children's Medical Group, Dalian, Liaoning Province, People's Republic of China.
Normal tension glaucoma as initial manifestation of Takayasu arteritis- an unknown entity.
Eur J Ophthalmol
January 2025
Department of Ophthalmology, Armed Forces Medical College, Pune, Maharashtra, India.
Objective: To report an unusual manifestation of normal tension glaucoma(NTG) in a young female as presenting feature of Takayasu arteritis (TA).
Methods: We present a case of a 24-year-old woman who was initially diagnosed with NTG, with characteristic optic disc and retinal nerve fiber layer (RNFL) changes, and corresponding visual field defects. Further evaluation with CT angiography revealed that the patient had newly diagnosed TA.
Reduction in EEG theta power as a potential marker for spatial disorientation during flight.
Sci Rep
January 2025
Department of Cognitive and Brain Sciences, Ben-Gurion University of the Negev, 1 Ben-Gurion Blvd, Beer-Sheva, Israel.
During flight, spatial disorientation (SD) commonly occurs when a pilot's perception conflicts with the aircraft's actual motion, attitude, or position. A prevalent form of SD is the somatogyral illusion, which is elicited by constant speed rotation and causes a false perception of motion in the opposite direction when the rotation ceases. This research aimed to investigate changes in brain activity that occur when experiencing a somatogyral illusion by simulating conditions closely mimicking flight conditions to gain insight into how to better manage this illusion during flight.
View Article and Find Full Text PDFA Mutant Complement Factor H (W1183R) Enhances Proteolytic Cleavage of von Willebrand Factor by ADAMTS13 Under Shear.
J Thromb Haemost
January 2025
Department of Pathology and Laboratory Medicine; Institute of Reproductive Medicine and Developmental Sciences, The University of Kansas Medical Center, Kansas City, KS 66160. Electronic address:
Background: A loss-of-functional mutation (W1183R) in human complement factor H (CFH) is associated with complement-associated hemolytic uremic syndrome; mice carrying a similar mutation (W1206R) in CFH also develop thrombotic microangiopathy but its plasma von Willebrand factor (VWF) multimer sizes were dramatically reduced. The mechanism underlying such a dramatic change in plasma VWF multimer distribution in these mice is not fully understood.
Objective And Methods: To determine the VWF and CFH interaction and how CFH proteins affect VWF multimer distribution, we employed recombinant protein expression, purification, and various biochemical and biophysical tools.
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!