Publications by authors named "Chikako Sakai"
A quantum phase estimation algorithm allows us to perform full configuration interaction (full-CI) calculations on quantum computers with polynomial costs against the system size under study, but it requires quantum simulation of the time evolution of the wave function conditional on an ancillary qubit, which makes the algorithm implementation on real quantum devices difficult. Here, we discuss an application of the Bayesian phase difference estimation algorithm that is free from controlled time evolution operations to the full-CI calculations.
View Article and Find Full Text PDFQuantum computers can perform full configuration interaction (full-CI) calculations by utilising the quantum phase estimation (QPE) algorithms including Bayesian phase estimation (BPE) and iterative quantum phase estimation (IQPE). In these quantum algorithms, the time evolution of wave functions for atoms and molecules is simulated conditionally with an ancillary qubit as the control, which make implementation to real quantum devices difficult. Also, most of the problems in chemistry discuss energy differences between two electronic states rather than total energies themselves, and thus direct calculations of energy gaps are promising for future applications of quantum computers to real chemistry problems.
View Article and Find Full Text PDFArticle Synopsis
- The study focused on predicting the progression of keratoconus and the need for corneal crosslinking using deep learning technology.
- Researchers analyzed 274 corneal tomography images from 158 keratoconus patients, grouping them into progressors and non-progressors based on their condition over time.
- The deep learning model evaluated axial maps, pachymetry maps, and their combination, achieving AUC values around 0.783 to 0.814, with varying sensitivities and specificities, indicating its potential to predict keratoconus progression effectively.
Introduction: The primary purpose of crosslinking is to halt the progression of ectasia. We retrospectively assessed the condition of keratoconus patients who were followed-up at least twice after the initial examination to evaluate keratoconus progression, to identify definitive factors to predict a later need for corneal crosslinking (CXL).
Methods: The medical charts of 158 eyes of 158 keratoconus patients (112 males and 46 females; mean age, 27.
Purpose: We retrospectively investigated the efficacy of corneal crosslinking (CXL) on progressive keratoconus in a Japanese population and compared the outcomes of conventional and accelerated CXL.
Study Design: A retrospective cohort study METHODS: A total of 108 consecutive eyes in 95 patients (75 men; 21.9 ± 6.
Purpose: To evaluate the efficacy of punctal plugs for patients with post-LASIK dry eye.
Materials And Methods: A prospective study was conducted on 25 eyes of 18 patients who underwent LASIK. All eyes fulfilled the Japanese dry-eye criteria and had not responded to conventional treatment with artificial tears by 1 month postsurgery.
To avoid the inhibition of methane production by ammonia that occurs during the degradation of garbage, anaerobic digestion with prior ammonia production and subsequent stripping was investigated. In the ammonia production phase, the maximum ammonia concentration was approximately 2800 mg N/kg of total wet sludge in the range of 4 days of sludge retention time, indicating that only 43% of total nitrogen in the model garbage was converted to ammonia. The model garbage from which ammonia was produced and stripped was subjected to semi-continuous thermophilic dry anaerobic digestion over 180 days.
View Article and Find Full Text PDFPurpose: To evaluate the use of topography-guided conductive keratoplasty in eyes with keratoconus.
Design: Interventional case series.
Methods: We examined 21 eyes in 21 patients with advanced keratoconus.
Purpose: To evaluate visual performance during concentrated visual work in patients wearing soft contact lenses or after LASIK.
Methods: Thirty-one eyes of 17 patients who had worn soft contact lenses before LASIK were examined by the following tests immediately and 10 seconds after eye opening: 1) functional visual acuity, which is defined as visual acuity measured after prolonged eye opening without blinking; 2) surface regularity index (SRI) and surface asymmetry index (SAI) in corneal topography; and 3) higher order aberration measured with NIDEK OPD-Scan. Results were compared in the same patients before (with soft contact lenses and no eye surgery) and 1 month after LASIK (without soft contact lenses).
Purpose: Positionally induced cyclotorsion could be an important factor in the correction of astigmatism during refractive surgery. We analyzed the change in cyclotorsional rotation during excimer laser ablation in LASIK surgery using the NIDEK Torsion Error Detector (TED).
Methods: One hundred ten patients (192 eyes) who underwent LASIK for myopic astigmatism, using the NIDEK Advanced Vision Excimer Laser (NAVEX) were measured for cyclotorsion during surgery using the TED system.
Purpose: To investigate the efficacy and safety of LASIK over a 5-year postoperative period.
Design: Observational case series.
Participants: We examined 779 eyes in 402 patients with myopia or myopic astigmatism who underwent LASIK to correct their refractive errors and received regular postoperative assessments for 5 years.
Purpose: To investigate the anatomic variations of entrance pupil decentration and tilting angle of the iris in healthy subjects and the influence of these factors on the outcome of laser in situ keratomileusis (LASIK).
Setting: Minamiaoyama Eye Clinic, Tokyo, Japan.
Methods: The degree of pupil decentration and tilting angle of the iris in 2280 eyes of 1144 myopic patients without abnormal findings by ophthalmologic examination were assessed using Orbscan.
Purpose: To investigate the efficacy and safety of implantation of an iris-claw phakic intraocular lens (PIOL), Artisan Myopia, in Asian eyes.
Setting: Minamiaoyama Eye Clinic, Tokyo, Japan.
Methods: Forty-four eyes of 32 Japanese patients and 1 Korean patient with high myopia had Artisan Myopia lens implantation to correct their refractive errors.