1,304 research outputs found
Browser State Repository Service
We introduce browser state repository (BSR) service that allows a user to save and restore multiple independent snapshots of web sessions on a browser. At a later time, the user can retrieve any saved snapshot on a potentially different browser on a different device to continue any one of the chosen saved session in any order. The web session snapshot captures a complete browser running state, including the last page that appears on the browser, document object state, script state, values that a user enters in forms on the last page, browser history for back and forward pages, and cookies. BSR service consists of a browser plug-in that takes browser session snapshots, and a repository server that stores snapshots securely for each user. The main contribution of BSR service is that it decouples association between browser state and a device, in favor of association between browser state and its user
Technique of using Cionni-modified capsular tension ring in the management of severely traumatic lens subluxation
AIM: To investigate the effect of Cionni-modified capsular tension ring (CTR) implantation in patients with severely traumatic subluxated cataracts. METHODS: All patients who totally had traumatic cataracts and lost zonule support and underwent cataract surgery were retrospectively analyzed. Corrected distance visual acuity (CDVA), extent of zonulysis, intraocular lens (IOL) position, intraoperative presentation, and complications were assessed. The primary outcomes included IOL centration stability and other postoperative complications. RESULTS: Twenty patients (20 eyes) were included in this study. The mean age in this study was 58.0±11.3y, and the average follow-up time was 17.3±12.8mo. Capsule bags were saved by Cionni-modified CTR. Nine eyes (45%) underwent simultaneously anterior vitrectomy due to the presence of vitreous in the anterior chamber. The preoperative mean CDVA was 0.83±0.24 logMAR, and the postoperative average CDVA was 0.23±0.30 logMAR (P<0.05). The horizontal and vertical IOL decentration after surgery was 0.27±0.12 mm and 0.41±0.19 mm, respectively; the vertical and horizontal IOL tilt after surgery was 5.5°±2.5° and 6.1°±2.2°, respectively. None of the eyes had obvious IOL decentration during the follow-up time. Eight eyes (40%) had posterior capsule opacification (PCO) that was severe enough to cause poor vision. Neodymium: YAG laser capsulotomy were performed on these eyes when the CTR was stabilized. CONCLUSION: With the help of Cionni-modified CTR, capsular bag preservation and better IOL concentration can be achieved without major complications in patients with severely traumatic subluxated cataracts
Systematic study of proton radioactivity half-lives based on the relationship between the Skyrme-Hartree-Fock and the macroscopic quantities of nuclear matter
In the present work, we systematically study the proton radioactivity
half-lives of 33 spherical nuclei based on the relationship between the Skyrme
parameters and the macroscopic quantities of nuclear matter. Using the
two-potential approach with the spherical Skyrme-Hartree-Fock model, the
correlation between proton radioactivity half-life and macroscopic quantities
was analyzed. Moreover, we obtained a new Skyrme parameter set by fitting the
two most weighted macroscopic quantities. Compared with Skyrme parameters MSL0
and the theoretical model of proton radioactivity UDLP, the theoretical proton
radioactivity half-life calculated by the new Skyrme parameter set can better
reproduce the experimental data.Comment: 8 pages, 3 figure
Mutation of SLC35D3 causes metabolic syndrome by impairing dopamine signaling in striatal D1 neurons
We thank Dr. Ya-Qin Feng from Shanxi Medical University, Dr. Tian-Yun Gao from Nanjing University and Dr. Yan-Hong Xue from Institute of Biophysics (CAS) for technical assistance in this study. We are very thankful to Drs. Richard T. Swank and Xiao-Jiang Li for their critical reading of this manuscript and invaluable advice. Funding: This work was partially supported by grants from National Basic Research Program of China (2013CB530605; 2014CB942803), from National Natural Science Foundation of China 1230046; 31071252; 81101182) and from Chinese Academy of Sciences (KSCX2-EW-R-05, KJZD-EW-L08). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.Peer reviewedPublisher PD
Ultrafast Laser Ablation, Intrinsic Threshold, and Nanopatterning of Monolayer Molybdenum Disulfide
Laser direct writing is an attractive method for patterning 2D materials
without contamination. Literature shows that the femtosecond ablation threshold
of graphene across substrates varies by an order of magnitude. Some attribute
it to the thermal coupling to the substrates, but it remains by and large an
open question. For the first time the effect of substrates on femtosecond
ablation of 2D materials is studied using MoS as an example. We show
unambiguously that femtosecond ablation of MoS is an adiabatic process
with negligible heat transfer to the substrates. The observed threshold
variation is due to the etalon effect which was not identified before for the
laser ablation of 2D materials. Subsequently, an intrinsic ablation threshold
is proposed as a true threshold parameter for 2D materials. Additionally, we
demonstrate for the first time femtosecond laser patterning of monolayer
MoS with sub-micron resolution and mm/s speed. Moreover, engineered
substrates are shown to enhance the ablation efficiency, enabling patterning
with low-power femtosecond oscillators. Finally, a zero-thickness approximation
is introduced to predict the field enhancement with simple analytical
expressions. Our work clarifies the role of substrates on ablation and firmly
establishes femtosecond laser ablation as a viable route to pattern 2D
materials
Cation-Mutation Design of Quaternary Nitride Semiconductors Lattice-Matched to GaN
The search for new direct bandgap, earth-abundant semiconductors for efficient, high-quality optoelectronic devices, as well as photovoltaic and photocatalytic energy conversion has attracted considerable interest. One methodology for the search is to study ternary and multiternary semiconductors with more elements and more flexible properties. Cation mutation such as binary → ternary → quaternary for ZnS → CuGaS_2 → Cu_2ZnSnS_4 and ZnO → LiGaO_2 → Li_2ZnGeO_4 led to a series of new quaternary chalcogenide and oxide semiconductors with wide applications. Similarly, starting with GaN, ternary nitrides such as ZnSnN_2 and ZnGeN_2 have been designed and synthesized recently. However, quaternary nitride semiconductors have never been reported either theoretically or experimentally. Through a combination of the Materials Genome database with the first-principles calculations, we designed a series of quaternary nitride compounds I–III–Ge_2N_4 (I = Cu, Ag, Li, Na, K; III = Al, Ga, In) following the GaN → ZnGeN_2 → I–III–Ge_2N_4 mutation. Akin to Li_2ZnGeO_4, these quaternary nitrides crystallize in a wurtzite-derived structure as their ground state. The thermodynamic stability analysis shows that while most of them are not stable with respect to phase separation, there are two key exceptions (i.e., LiAlGe_2N_4 and LiGaGe_2N_4), which are stable and can be synthesized without any secondary phases. Interestingly, they are both lattice-matched to GaN and ZnO, and their band gaps are direct and larger than that of GaN, 4.36 and 3.74 eV, respectively. They have valence band edges as low as ZnO and conduction band edges as high as GaN, thereby combining the best of GaN and ZnO in a single material. We predict that flexible and efficient band structure engineering can be achieved through forming GaN/LiAlGe_2N_4/LiGaGe_2N_4 heterostructures, which have tremendous potential for ultraviolet optoelectronics
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