Статті в журналах: "HYPEROPT"

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Suryana, Silvia Elsa, Budi Warsito, and Suparti Suparti. "PENERAPAN GRADIENT BOOSTING DENGAN HYPEROPT UNTUK MEMPREDIKSI KEBERHASILAN TELEMARKETING BANK." Jurnal Gaussian 10, no. 4 (December 31, 2021): 617–23. http://dx.doi.org/10.14710/j.gauss.v10i4.31335.

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Telemarketing is another form of marketing which is conducted via telephone. Bank can use telemarketing to offer its products such as term deposit. One of the most important strategy to the success of telemarketing is opting the potential customer to create effective telemarketing. Predicting the success of telemarketing can use machine learning. Gradient boosting is machine learning method with advanced decision tree. Gardient boosting involves many classification trees which are continually upgraded from previous tree. The optimal classification result cannot be separated from the role of the optimal hyperparameter. Hyperopt is Python library that can be used to tune hyperparameter effectively because it uses Bayesian optimization. Hyperopt uses hyperparameter prior distribution to find optimal hyperparameter. Data in this study including 20 independent variables and binary dependent variable which has ‘yes’ and ‘no’ classes. The study showed that gradient boosting reached classification accuracy up to 90,39%, precision 94,91%, and AUC 0,939. These values describe gradient boosting method is able to predict both classes ‘yes’ and ‘no’ relatively accurate.

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2

Dumitrache, Andreea, Denisa Melian, Delia Bălăcian, Alexandra Nastu, and Stelian Stancu. "Churn prepaid customers classified by HyperOpt techniques." Proceedings of the International Conference on Applied Statistics 2, no. 1 (December 1, 2020): 139–51. http://dx.doi.org/10.2478/icas-2021-0013.

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Abstract The telecommunications industry is representative when it comes to a country’s economy. In this industry, the customer plays a very important role in maintaining a stable income. The churn customer is one of the most important concerns for large companies. This increased attention is due to its direct effect on the revenues of large companies in the telecommunications industry, companies being in a constant search to develop ways to predict this type of customer. The aim of our paper is to identify potential customers at risk of churn using modern data mining techniques, often used in the business world. From the nine techniques tested, we choose as the churn prediction model, the technique with the highest performance. The effectiveness of the model is tested and evaluated by the f1-score. The model developed in the paper uses machine learning techniques on the Python platform, exploring a wide range of algorithms from logistic regression and the method of balancing the analyzed data set (Balanced Random Forest) to supervised learning methods (K-Nearest Neighbors, Naive Bayes) and optimization packages (Ligh GBM, CATBoost, ADABoost, RUSBoost, Stochastic Gradient Descent). The techniques analyzed in this paper cover a diverse range of methods that are compared in terms of performance. RUSBoost proves to be the best churn prediction model for telecom customers in this study. RUSBoost has the lowest loss function of all the tested techniques.

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3

Bergstra, James, Brent Komer, Chris Eliasmith, Dan Yamins, and David D. Cox. "Hyperopt: a Python library for model selection and hyperparameter optimization." Computational Science & Discovery 8, no. 1 (July 28, 2015): 014008. http://dx.doi.org/10.1088/1749-4699/8/1/014008.

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4

Wang, Mohan, Bo Lu, and Hao Wang. "Exploring the Market: Used Sailboat Price Estimates Based on Artificial Bee Colony-BP Neural Network." Highlights in Business, Economics and Management 16 (August 2, 2023): 72–79. http://dx.doi.org/10.54097/hbem.v16i.10539.

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In recent years, the shipping industry's share of world trade has been increasing year by year. As an important part of the shipping market, the accurate price prediction of second-hand sailboats is of great significance to grasping the price factors and improving the social and economic benefits. To accurately predict the price of second-hand sailboats, the artificial bee colony algorithm (ABC) is used to improve the BP neural network model, to solve the problem of overfitting of BP neural network. At the same time, compared with the prediction using Hyperopt improved XGBoost algorithm, the prediction effect of ABC-BP is better, and the fitting coefficient of the prediction results can reach 0.92.

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Yau, Gordon S. K., Jacky W. Y. Lee, Tiffany T. Y. Woo, Raymond L. M. Wong, and Ian Y. H. Wong. "Central Macular Thickness in Children with Myopia, Emmetropia, and Hyperopia: An Optical Coherence Tomography Study." BioMed Research International 2015 (2015): 1–4. http://dx.doi.org/10.1155/2015/847694.

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Purpose.To investigate the central macular thickness (CMT) in myopic, emmetropic, and hyperopic Chinese children using Optical Coherence Tomography.Methods.168 right eyes of Chinese subjects aged 4–18 were divided into 3 groups based on their postcycloplegic spherical equivalent: myopes (<−1.0 D); emmetropes (≥−1.0 to ≤+1.0 D); and hyperopes (>+1.0 D) and the CMT was compared before/after age adjustment. The CMT was correlated with age, axial length, and peripapillary retinal nerve fibre layer (RNFL).Results.The mean CMT was274.9±50.3 μm and the mean population age was7.6±3.3years. The CMT was thickest in the myopes (283.3±57.3 μm,n=56), followed by the hyperopes (266.2±55.31 μm,n=60) and then emmetropes (259.8±28.7 μm,n=52) (allP<0.0001). When adjusted for age, myopes had a thicker CMT than the other 2 groups (allP<0.0001) but there was no CMT difference between the emmetropes and hyperopes (P>0.05). There was no significant correlation between CMT with age, axial length, or peripapillary RNFL (allP≥0.2).Conclusion.Chinese children with myopia had a thicker CMT than those with emmetropia or hyperopia. There was no correlation of the CMT with age, axial length, or peripapillary RNFL thickness.

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6

Padmanabhuni, Sri Silpa, and Pradeepini Gera. "EHFT: An Ensembled Hyperopt Fine-Tuned Neural Network for Disease Detection in Tomato Plants." International Journal on Recent and Innovation Trends in Computing and Communication 11, no. 9s (August 31, 2023): 634–46. http://dx.doi.org/10.17762/ijritcc.v11i9s.7478.

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The identification of unhealthy plants in the crops at the early stage of cultivation helps for good farming. Unhealthy parts can be recognized using shape, color and texture, which are processed using feature extraction techniques. The feature extraction system stores the images in the matrix pixel format, which requires 3 channels for processing the images. Traditional neural networks utilize backpropagation techniques to adjust the random weights, which requires many resources while extracting a more significant number of features from a huge amount of data. These mechanisms also require more trainable parameters during the transformation of data from one layer to another. The proposed model implements the pre-trained model "RESNET152" (Residual Network), which is efficient for feature extraction and designs the last layer of the network as a "Tuned X-Gradient Boosting" ensemble algorithm for performing the binary classification of tomato leaves. RESNET can reduce computational resources because it implements residual blocks which fasten the learning rate by skipping a few connections in the network. The fine-tuned ensemble model helps the model identify the best parameters quickly. The learnable parameters are the essential elements of any ML model because they can easily identify the patterns associated with the different features. In the proposed model for feature extraction, pattern matching is the crucial step. Therefore, it is very necessary to tune the XGBOOST algorithm. Compared to the traditional approaches, the proposed model enhanced the accuracy performance in training and testing with 98.58% and 95.56%, correspondingly

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7

Schönning, Karin. "Hyperon Physics with PANDA at FAIR." EPJ Web of Conferences 241 (2020): 01015. http://dx.doi.org/10.1051/epjconf/202024101015.

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Hyperons provide new angles on two of the most challenging problems in contemporary physics: a coherent and quantitative description of the strong interaction, and the matter-antimatter asymmetry of the Universe. The production dynamics and the electromagnetic structure of strange hyperons, as well as hyperon spectroscopy, give insights into the strong interaction in the confinement domain. Furthermore, two-body decays of strange hyperons provide clean tests of CP symmetry, an essential piece to the matter-antimatter puzzle. The future experiment PANDA at FAIR offers unique possibilities to study different aspects of hyperons using antiproton beams. In particular, the hitherto almost unexplored multi-strange sector will be addressed. The expected large production cross sections of hyperons and the versatile, near 4 π detector design makes PANDA a veritable hyperon factory already from the first phase of operation. In these proceedings, the opportunities for hyperon physics with PANDA will be outlined. I will also address how we can benefit from the weak hyperon decays, that provide straight-forward access to the full spin density matrix.

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8

Gallo, Angel, Fabián Pérez, and Diego Salinas. "Minería de Datos y Proyección a Corto Plazo de la Demanda de Potencia en el Sistema Eléctrico Ecuatoriano." Revista Técnica "energía" 18, no. 1 (July 29, 2021): 72–85. http://dx.doi.org/10.37116/revistaenergia.v18.n1.2021.461.

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En este artículo se presenta una herramienta computacional elaborada en lenguaje de programación Python para minería de datos y proyección a corto plazo de la demanda de potencia eléctrica del Sistema Nacional Interconectado (SNI), utilizando el enfoque predictivo del algoritmo de aprendizaje automático Random Forest. La implementación de la función Hyperopt para definir los principales hiperparámetros del algoritmo Random Forest junto con la aplicación de la ingeniería de características permiten ajustar un modelo adecuado de aprendizaje automático para las series de datos. Dicho algoritmo es implementado en tareas de mitigación de valores faltantes y valores atípicos para estructurar bases de datos completos y libres de desviaciones. El procedimiento para minería de datos y proyección de demanda muestra la confiabilidad y versatilidad de utilizar la herramienta computacional obteniendo resultados relevantes, como la disminución de anomalías en las series de datos para mejorar la precisión en las curvas de demanda eléctrica proyectadas.

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9

Wang, Shuzhi. "Population Prediction Based on Logistic Regression and Random Forest." Highlights in Science, Engineering and Technology 49 (May 21, 2023): 496–500. http://dx.doi.org/10.54097/hset.v49i.8601.

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Due to the continuous improvement of quality of life and more stable social environment, the population is growing rapidly. Among them, population forecasting plays an important role in solving the problems brought by population growth. Based on the data indicators such as population, fertility rate and median age in China’s mainland from 1955 to 2022, the logistic regression model is usually used to predict the future population. This model is trained by Hyperopt to obtain the optimal parameters, it can improve the accuracy of the model. In addition, in order to show the differences between different models, this experiment also used random forest model to predict. The experimental results show that the population growth rate will slow down gradually and reach the maximum population in around 2030, after which it will show negative growth. By calculating the mean square error, it shows that the machine learning model can provide learners with accurate population prediction results.

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10

Song, Ji Eun, Hyo Ji Han, Chul Young Choi, Ramin Khoramnia, Hae Ran Chang, and So Young Han. "Comparison of Longitudinal Changes in Refractive Error of Hyperopic Children with or without Refractive Accommodative Esotropia." Diagnostics 11, no. 9 (August 26, 2021): 1547. http://dx.doi.org/10.3390/diagnostics11091547.

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We investigated longitudinal changes in the spherical equivalent refractive error (SE) in hyperopic children with or without refractive accommodative esotropia (AccET). A total of 456 patients met the inclusion criteria: 190 (41.7%) in the hyperopic control group and 266 (58.3%) in the AccET group. All patients received at least 3 years of follow-up after spectacle prescription. Subgroups were divided according to age when spectacles were prescribed, presence of amblyopia, or initial SE. Longitudinal changes in SE in children with hyperopia showed a gradual decrease, although SE of younger children with AccET increased over the first 4 years and then decreased thereafter. SE in eye with higher SE was tended to decrease significantly in patient with Acc ET than hyperopic control group (group × time p = 0.015). Amblyopic eyes showed a greater decreased in SE compared with non-amblyopic eyes, but it was not statistically significant (p = 0.07). SE was significantly decreased in children with more hyperopia (≥ 3 D) compared with children with less hyperopia (<3 D) (p = 0.008). Emmetropization of hyperopia was faster in hyperopic patients without AccET and could be affected by the age of the initial spectacles prescription, initial amount of SE, or presence of amblyopia.

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11

Vidaña, Isaac. "Hyperons: the strange ingredients of the nuclear equation of state." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 474, no. 2217 (September 2018): 20180145. http://dx.doi.org/10.1098/rspa.2018.0145.

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We review the role and properties of hyperons in finite and infinite nuclear systems. In particular, we present different production mechanisms of hypernuclei, as well as several aspects of hypernuclear γ -ray spectroscopy, and the weak decay modes of hypernuclei. Then we discuss the construction of hyperon–nucleon and hyperon–hyperon interactions on the basis of the meson-exchange and chiral effective field theories. Recent developments based on the so-called V low k approach and lattice quantum chromodynamics will also be addressed. Finally, we go over some of the effects of hyperons on the properties of neutron and proto-neutron stars with an emphasis on the so-called ‘hyperon puzzle’, i.e. the problem of the strong softening of the equation of state, and the consequent reduction of the maximum mass, induced by the presence of hyperons, a problem which has become more intriguing and difficult to solve due the recent measurements of approximately 2 M ⊙ millisecond pulsars. We discuss some of the solutions proposed to tackle this problem. We also re-examine the role of hyperons on the cooling properties of newly born neutron stars and on the development of the so-called r-mode instability.

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12

Moosavi Nejad, S. M., and A. Armat. "Determination of hyperon properties through the variational method considering the hyperfine interaction." International Journal of Modern Physics E 28, no. 10 (October 2019): 1950087. http://dx.doi.org/10.1142/s0218301319500873.

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Performing a fit procedure on the hyperon masses, we first determine the free parameters in the Cornell-like hypercentral potential between the constituent quarks of hyperons in their ground state. To this end, using the variational principle, we apply the hyperspherical Hamiltonian including the Cornell-like hypercentral potential and the perturbation potentials due to the spin–spin, spin–isospin and isospin–isospin interactions between constituent quarks. In the following, we compute the hyperon magnetic moments as well as radiative decay widths of spin-3/2 hyperons using the spin-flavor wave function of hyperons. Our analysis shows acceptable consistencies between theoretical results and available experimental data. This leads to reliable wave functions for hyperons at their ground state.

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13

Rieger, Jana. "The FAIR Phase-0 Hyperon Program at HADES." EPJ Web of Conferences 291 (2024): 05005. http://dx.doi.org/10.1051/epjconf/202429105005.

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Abstract. Hyperons are a unique probe to study the non-perturbative aspects of the strong interaction. At HADES, they are produced in proton or pion induced reactions at kinetic energies up to 4.5 GeV. Already in the past, HADES has shown its potential for hyperon physics, including λ polarization, λ-N interaction and measurements of the λ(1405) and λ(1520) line-shapes. The HADES detector has recently been extended with a forward detector, partly developed for the PANDA experiment, extending the acceptance for hyperon channels at forward angles. The PANDA@HADES initiative gives the opportunity for an even richer hyperon program. The current main objectives are the production of hyperon resonances, electromagnetic decays of hyperons with special focus on hyperon Dalitz decays and double strangeness production, including a λ – λ interaction study and ξ− production. First results from the ongoing studies promise a successful execution of the program. In the future, there is the possibility for a pion beam experiment with HADES, enabling further hyperon studies.

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14

Bolinovska, Sofija. "Hyperopia in preschool and school children." Medical review 60, no. 3-4 (2007): 115–21. http://dx.doi.org/10.2298/mpns0704115b.

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Hypermetropia (hyperopia) is a refractive error of the eye in which parallel light rays focus behind the macula luthea without accommodation giving an unclear retinal image. The involvement of accommodation in correction of far-sightedness leads to the following three clinical types of hyperopia: total, latent and manifest. Minor hyperopias can be successfully corrected by accommodation higher than +3.0D. If not corrected timely, they may cause amblyopia and esotropia, while high hyperopic anisometropia of a hyperopic eye, usually results in an amblyopic eye. The study included 200 children (400 eyes) within the age range of 3 to 18 years, and it was done following the assigned protocol in the course of clinical ophthalmologic check-ups. The most frequent refractive error in the examined children was hyperopia with hyperopic astigmatism, while anisometropia was found in 22% of children but the frequency was reduced in older children. Refractive family history was found in 60.50% of children. Hyperopia can result in poor visual development, occurrence of amblyopia and strabismus and therefore it represents a significant public health problem. As one of the most frequent amblyogenic factors in children, it can be eliminated/prevented by a screening program and adequate treatment providing prevention of amblyopia, which is a form of blindness. .

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15

Gndoyan, I. A., A. V. Petraevsky, and N. A. Kuznetsova. "Eyeglass correction: influence on the morphometric parameters of the anterior chamber and the eye hydrodynamics in presbyopes with hyperopia." EYE GLAZ 25, no. 1 (April 1, 2023): 11–18. http://dx.doi.org/10.33791/2222-4408-2023-1-11-18.

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The work of accommodative apparatus has a regulatory effect on the hydrodynamics of eye and it is involved in ensuring the normal outflow of intraocular fluid (IOF). Age-related weakening of accommodation leads to a deterioration in the state of hydrodynamics, and especially significant shifts are expected in patients with axial hyperopia in the anatomical boundaries of “short” eye.Purpose. To evaluate the effect of correction with progressive lenses and monofocal ones on hydrodynamic indicators and certain morphometric parameters of the anterior chamber in presbyopic patients with hyperopia under conditions of long-term habitual professional eye strain.Material and methods. 25 subjects (50 eyes) of 44–55 y. o. (mean age 47 ± 1,6 years) were examined in January-July 2022. There were 8 males and 17 females with presbyopia and hyperopia. All patients were examined at the end of their working day: the first examination was performed in the initial state without correction, the second one − under using correction with monofocal lenses (control group) or progressive ones (main group). The examination methods included visometry, autorefractometry, pneumotonometry, ultrasound biometry, computerized tonography, determination of accommodation amplitude using the push-up test, optical coherence tomography of the eye anterior segment.Results. The critic tension of hydrodynamics, the decreasing of anterior chamber depth and iridocorneal angle width were revealed in presbyopic hyperopic patients under the conditions of eye strain at a near distance without correction with eyeglasses. Using of correction with progressive lenses led to significant increasing of the accommodation amplitude (p < 0,001), decreasing of IOP (p < 0,001), increasing of aqueous humor outflow (p < 0,001), deepening of the anterior chamber (p < 0,001) and increasing of the iridocorneal angle width (p < 0,001) compared to the initial state. No significant changes in these parameters were revealed in the users of monofocal lenses compared to the initial state.Conclusion. Using of progressive lenses as a permanent correction has a positive effect on ocular hydrodynamics and morphometric parameters of the anterior chamber in presbyopic hyperopes. Lack of correction in hyperopic patients of presbyopic age not only causes of eye fatigue but also can lead to disruption of hydrodynamic balance and development of glaucoma.

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Sun, Xiangdong, Zhiqiang Miao, Baoyuan Sun, and Ang Li. "Astrophysical Implications on Hyperon Couplings and Hyperon Star Properties with Relativistic Equations of States." Astrophysical Journal 942, no. 1 (January 1, 2023): 55. http://dx.doi.org/10.3847/1538-4357/ac9d9a.

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Abstract Hyperons are essential constituents in the neutron star interior. The poorly known hyperonic interaction is a source of uncertainty for studying laboratory hypernuclei and neutron star observations. In this work, we perform Bayesian inference of phenomenological hyperon–nucleon interactions using the tidal deformability measurement of the GW170817 binary neutron star merger as detected by LIGO/Virgo and the mass–radius measurements of PSR J0030+0541 and PSR J0740+6620 as detected by NICER. The analysis is based on a set of stiff relativistic neutron star matter equation of states with hyperons from the relativistic mean-field theory, naturally fulfilling the causality requirement and empirical nuclear matter properties. We specifically utilize the strong correlation recently deduced between the scalar and vector meson–hyperon couplings, imposed by the measured Λ separation energy in single-Λ hypernuclei, and perform four different tests with or without the strong correlation. We find that the laboratory hypernuclear constraint ensures a large enough Λ–scalar–meson coupling to match the large vector coupling in hyperon star matter. When adopting the current most probable intervals of hyperon couplings from the joint analysis of laboratory and astrophysical data, we find the maximum mass of hyperon stars is at most 2.176 − 0.202 + 0.085 M ⊙ (68% credible interval) from the chosen set of stiff equation of states. The reduction of the stellar radius due to hyperons is quantified based on our analysis and various hyperon star properties are provided.

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17

Gerling, Alexander, Holger Ziekow, Andreas Hess, Ulf Schreier, Christian Seiffer, and Djaffar Ould Abdeslam. "Comparison of algorithms for error prediction in manufacturing with automl and a cost-based metric." Journal of Intelligent Manufacturing 33, no. 2 (January 3, 2022): 555–73. http://dx.doi.org/10.1007/s10845-021-01890-0.

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AbstractIn order to manufacture products at low cost, machine learning (ML) is increasingly used in production, especially in high wage countries. Therefore, we introduce our PREFERML AutoML system, which is adapted to the production environment. The system is designed to predict production errors and to help identifying the root cause. It is particularly important to produce results for further investigations that can also be used by quality engineers. Quality engineers are not data science experts and are usually overwhelmed with the settings of an algorithm. Because of this, our system takes over this task and delivers a fully optimized ML model as a result. In this paper, we give a brief overview of what results can be achieved with a state-of-the-art classifier. Moreover, we present the results with optimized tree-based algorithms based on RandomSearchCV and HyperOpt hyperparameter tuning. The algorithms are optimized based on multiple metrics, which we will introduce in the following sections. Based on a cost-oriented metric we can show an improvement for companies to predict the outcome of later product tests. Further, we compare the results from the mentioned optimization approaches and evaluate the needed time for them.

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TAKATSUKA, T., S. NISHIZAKI, Y. YAMAMOTO, and R. TAMAGAKI. "HYPERON SUPERFLUIDITY IN NEUTRON STAR CORES." International Journal of Modern Physics B 15, no. 10n11 (May 10, 2001): 1609–12. http://dx.doi.org/10.1142/s0217979201006100.

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Superfluidity of Λ-hyperons admixed in neutron star cores is investigated by a realistic approach and found to be realizable with the critical temperature of 108-9 K though in a restricted density region. In reference to the results of Λ, the possible occurence of the Σ-- and Ξ-- superfluidities is pointed out. The pairing effects of hyperons is also shown to be important in hypernuclear matter relevant to hypernuclei. In a treatment of a gap equation, the necessity to use a "bare" hyperon-hyperon interaction, instead of an "effective" one, is stressed.

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Sarkar, Debojit. "Global and local polarization of Λ (Λ) hyperons in Pb–Pb collisions in ALICE at the LHC". EPJ Web of Conferences 259 (2022): 06001. http://dx.doi.org/10.1051/epjconf/202225906001.

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The global polarization of the Λ and Λ¯ hyperons (PH) has been measured in Pb–Pb collisions at √SNN = 2.76 TeV and 5.02 TeV in ALICE at the Large Hadron Collider (LHC). The hyperon global polarization is found to be consistent with zero at both collision energies. The local polarization of the Λ and Λ¯ hyperons along the beam (z) direction, Pz, has also been measured in Pb–Pb collisions at √SNN = 5.02 TeV. The Pz, measured as a function of the hyperon emission angle relative to the second harmonic symmetry plane, exhibits a second harmonic sine modulation, as expected due to elliptic flow. The measurements of global and local hyperon polarization are reported for different collision centralities and as a function of transverse momentum in semicentral collisions. These results show the first experimental evidence of a non-zero hyperon Pz in Pb–Pb collisions at the LHC.

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BHOWMICK, BIPASHA, ABHIJIT BHATTACHARYYA, and G. GANGOPADHYAY. "GROUND STATES AND EXCITED STATES OF HYPERNUCLEI IN RELATIVISTIC MEAN FIELD APPROACH." International Journal of Modern Physics E 21, no. 07 (July 2012): 1250069. http://dx.doi.org/10.1142/s0218301312500693.

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Hypernuclei have been studied within the framework of Relativistic Mean Field theory. The force FSU Gold has been extended to include hyperons. The effective hyperon–nucleon and hyperon–hyperon interactions have been obtained by fitting experimental energies in a number of hypernuclei over a wide range of mass. Calculations successfully describe various features including hyperon separation energy and single particle spectra of single-Λ hypernuclei throughout the periodic table. We also extend this formalism to double-Λ hypernuclei.

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ÖZPINECI, A., S. B. YAKOVLEV та V. S. ZAMIRALOV. "QCD SUM RULES: INTERCROSSED RELATIONS FOR THE Σ0–Λ MASS SPLITTING". Modern Physics Letters A 20, № 04 (10 лютого 2005): 243–49. http://dx.doi.org/10.1142/s021773230501649x.

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New relations between QCD Borel sum rules for masses of Σ0 and Λ hyperons are constructed. It is shown that starting from the sum rule for the Σ0 hyperon mass it is straightforward to obtain the corresponding sum rule for the Λ hyperon mass and vice versa.

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Wang, Chung-Ying, Chien-Yao Huang, and Yen-Han Chiang. "Solutions of Feature and Hyperparameter Model Selection in the Intelligent Manufacturing." Processes 10, no. 5 (April 27, 2022): 862. http://dx.doi.org/10.3390/pr10050862.

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In the era of Industry 4.0, numerous AI technologies have been widely applied. However, implementation of the AI technology requires observation, analysis, and pre-processing of the obtained data, which takes up 60–90% of total time after data collection. Next, sensors and features are selected. Finally, the AI algorithms are used for clustering or classification. Despite the completion of data pre-processing, the subsequent feature selection and hyperparameter tuning in the AI model affect the sensitivity, accuracy, and robustness of the system. In this study, two novel approaches of sensor and feature selecting system, and hyperparameter tuning mechanisms are proposed. In the sensor and feature selecting system, the Shapley Additive ExPlanations model is used to calculate the contribution of individual features or sensors and to make the black-box AI model transparent, whereas, in the hyperparameter tuning mechanism, Hyperopt is used for tuning to improve model performance. Implementation of these two new systems is expected to reduce the problems in the processes of selection of the most sensitive features in the pre-processing stage, and tuning of hyperparameters, which are the most frequently occurring problems. Meanwhile, these methods are also applicable to the field of tool wear monitoring systems in intelligent manufacturing.

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Ajik, Emmy Danny, Georgina N. Obunadike, and Faith O. Echobu. "Fake News Detection Using Optimized CNN and LSTM Techniques." Journal of Information Systems and Informatics 5, no. 3 (August 31, 2023): 1044–57. http://dx.doi.org/10.51519/journalisi.v5i3.548.

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Concerns have been raised about the social consequences of fake news as it has spread rapidly on online platforms. It is critical to detect and mitigate the spread of fake news in order to maintain a healthy community conversation. There is a need to put more effort into the identification of fake news as more people use the internet, especially as more internet-enabled gadgets become more widely available and inexpensive. With the help of two Neural Network techniques: long-short-term memory (LSTM) and Convolutional Neural Network (CNN). This research proposes novel deep-learning methods for identifying fake news using two datasets. These methods were considered for this research because they had proven to be successful in earlier studies that had been looked at. Finding the best-performing optimal models is the goal of this study. HyperOpt Technique was used for Neural Network model. The performance of the optimized models was compared with the performance of the models without optimization. The results obtained showed that for both datasets, CNN and LSTM performed better when training the models with the optimal values with an average difference of 12.7% for Accuracy, 11.9% for Precision, 12.3% for Recall and 15.4% for F1-Score.

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24

Ishii, Noriyoshi, Sinya Aoki, Takumi Doi, Shinya Gongyo, Tetsuo Hatsuda, Yoichi Ikeda, Takashi Inoue та ін. "Baryon interactions from lattice QCD with physical masses —S = −3 sector: Ξ∑ and Ξ∑-Λ∑—". EPJ Web of Conferences 175 (2018): 05013. http://dx.doi.org/10.1051/epjconf/201817505013.

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Hyperon-nucleon and hyperon-hyperon interactions are important in studying the properties of hypernuclei in hypernuclear physics. However, unlike the nucleons which are quite stable, hyperons are unstable so that the direct scattering experiments are difficult, which leads to the large uncertainty in the phenomenological determination of hyperon potentials. In this talk, we use the gauge configurations generated at the (almost) physical point (mπ = 146 MeV) on a huge spatial volume (8:1fm)4 to present our latest result on the hyperon-hyperon potentials in S = −3 sector (Ξ∑ single channel and Ξ∑- ΞΛ; coupled channel) from the Nambu-Bethe-Salpeter wave functions based on the HAL QCD method with improved statistics.

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25

Woo, GC, and JG Sivak. "The Refractive State of the Eye of the Kangaroos Macropus giganteus and M. rufus." Australian Journal of Zoology 33, no. 3 (1985): 313. http://dx.doi.org/10.1071/zo9850313.

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Refractive findings were determined with a retinoscope for two species of kangaroos. The 10 eyes studied were found to be hyperopic between 1.5 and 2.0 dioptres, with and without cycloplegia. Due to the large size of the eye, the hyperopia cannot be explained on the basis of retinoscopic reflection from the vitreous-retina border. The hyperopia may be due to an as yet unexplained artefact or it may reflect indifference to optical quality.

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26

White, Christopher G. "RARE HYPERON AND KAON DECAYS FROM HYPERCP." International Journal of Modern Physics A 16, supp01b (September 2001): 687–89. http://dx.doi.org/10.1142/s0217751x01007807.

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Over 120 terabytes of data were collected during the 1997 and 1999 runs of Fermilab E871 (HyperCP). From these data we expect to reconstruct more than 1 billion cascade hyperon decays, 100 million charged kaon decays, and 10 million omega hyperon decays. These data provide new sensitivity to lepton number violation in hyperon decays, and independent confirmation of the flavor changing neutral current decay of a charged kaon to a pion and two muons.

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27

Irshad, Muzaffar, Dong Liu, Xiaorong Zhou та Guangshun Huang. "Electromagnetic Form Factors of Σ Hyperons". Symmetry 14, № 1 (4 січня 2022): 69. http://dx.doi.org/10.3390/sym14010069.

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Electromagnetic form factors (EMFFs) are fundamental observable of baryons that intimately related to their internal structure and dynamics, where the EMFFs of hyperons provide valuable insight into the behavior of the strangeness. The EMFFs of hyperons can also help to understand those of nucleons as they are connected with the flavor SU(3) symmetry. The EMFFs of nucleons can be measured in both spacelike and timelike regions. However, it is difficult to probe the EMFFs of hyperons in spacelike region due to the unstable nature of hyperons. By means of electron-positron annihilation, the EMFFs of hyperons in timelike region is accessible via the production of hyperon-antihyperon pair. The timelike EMFFs of the isospin triplet Σ hyperons measured at Babar, CLEO-c and BESIII experiments are reviewed in this paper. Besides, the relevant theoretical discussion based on the experimental results are also presented.

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28

Panda, Prafulla K., Constança Providência, Steven A. Moszkowski, Henrik Bohr, and João da Providência. "Hyperonic stars within the Bogoliubov quark meson model for nuclear matter." International Journal of Modern Physics E 28, no. 05 (May 2019): 1950034. http://dx.doi.org/10.1142/s0218301319500344.

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We generalize the Bogoliubov quark-meson coupling (QMC) model to also include hyperons. The hyperon-[Formula: see text]-meson couplings are fixed by the model and the hyperon-[Formula: see text]-meson couplings are fitted to the hyperon potentials in symmetric nuclear matter. The present model predicts neutron stars with masses above 2[Formula: see text] and the radius of a 1.4[Formula: see text] star [Formula: see text]14[Formula: see text]km. In the most massive stars, bags overlap at the core of the star, and this may be interpreted as a transition to deconfined quark matter.

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29

Ghazanfari Mojarrad, M., and R. Arabsaeidi. "Hyperon-rich matter in a two-solar-mass neutron star within the Thomas-Fermi approximation." International Journal of Modern Physics E 25, no. 12 (December 2016): 1650102. http://dx.doi.org/10.1142/s0218301316501020.

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The equation of state (EOS) of hyperon-rich matter for neutron stars (NSs) is investigated in a semi-classical mean-field (MF) model. We present a new generalized baryon–baryon interaction in phase space to derive the EOS by the Thomas–Fermi approximation. Our findings have profound consequences for the structure and properties of NSs. Within this statistical model, the EOS of NS matter with hyperons is stiff enough. Consequently, the results for the maximum mass of NSs are consistent with [Formula: see text] and [Formula: see text]. It is also revealed that the hyperon–hyperon interactions slightly soften the EOS.

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30

Steinheimer, Jan, Manjunath Omana Kuttan, Anton Motornenko, Agnieszka Sorensen, Yasushi Nara, Volker Koch, Marcus Bleicher та Horst Stoecker. "Proton and Λ flow and the equation of state at high density". EPJ Web of Conferences 276 (2023): 01021. http://dx.doi.org/10.1051/epjconf/202327601021.

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Results on proton and Λ flow, calculated with the UrQMD model that incorporates different realistic density dependent equations of state, are presented. It is shown that the proton and hyperon flow shows sensitivity to the equation of state and especially to the appearance of a phase transition at densities below 4n0. Even though qualitatively hyperons and protons exhibit the same beam energy dependence of the flow, the quantitative results are different. In this context it is suggested that the hyperon measurements can be used to study the density dependence of the hyperon interaction in high density QCD matter.

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31

Ortega-Usobiaga, Julio, Rosario Cobo-Soriano, Fernando Llovet, Francisco Ramos, Jaime Beltrán, and Julio Baviera-Sabater. "Retreatment of Hyperopia After Primary Hyperopic LASIK." Journal of Refractive Surgery 23, no. 2 (February 1, 2006): 201–5. http://dx.doi.org/10.3928/1081-597x-20070201-14.

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32

Nogueira-Santos, M. G. L., and C. C. Barros. "Polarization in low energy kaon–hyperon interaction." International Journal of Modern Physics E 29, no. 03 (March 2020): 2050013. http://dx.doi.org/10.1142/s0218301320500135.

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In this paper, we study the low energy kaon–hyperon interaction considering effective chiral Lagrangians that include kaons, [Formula: see text] mesons, hyperons and the corresponding resonances. The scattering amplitudes are calculated and then we determine the angular distributions and polarizations.

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33

Karyan, G. "Transverse and Longitudinal Lambda Polarization in Lepton Scattering by Unpolarized Nucleons at HERMES." International Journal of Modern Physics: Conference Series 40 (January 2016): 1660067. http://dx.doi.org/10.1142/s2010194516600673.

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Transverse and longitudinal polarization of [Formula: see text] hyperons has been studied. The transfere of polarization from high-energy positron to [Formula: see text] hyperon has been measured. The longitudinal spin transverse coefficient is found to be [Formula: see text] = [Formula: see text]. The transverse polarization of [Formula: see text] and [Formula: see text] hyperons has been measured in inclusive quasireal photoproduction process for various target nuclei. The polarization observed is positive for light target nuclei and compartaible with zero for heavy target nuclei.

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34

Kleber, Vera. "STRANGENESS PHOTOPRODUCTION AT ELSA." International Journal of Modern Physics E 19, no. 12 (December 2010): 2375–82. http://dx.doi.org/10.1142/s0218301310016831.

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Photoproduction of hyperons is a promising channel to achieve a complete amplitude analysis. Many observables have been measured and interpreted. The status is discussed here. Recent data obtained with the Crystal Barrel/TAPS setup at ELSA are shown and future plans for hyperon photoproduction are presented.

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35

Vidaña, Isaac. "Hyperons in Finite and Infinite Nuclear Systems." Universe 7, no. 10 (October 9, 2021): 376. http://dx.doi.org/10.3390/universe7100376.

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In this work, we shortly review the role and properties of hyperons in finite and infinite nuclear systems such as hypernuclei and neutron stars. Particularly, we describe different production mechanisms of hypernuclei, discuss some aspects of their γ-ray spectroscopy and their weak decay modes, and give a few strokes on their theoretical description. We reexamine also the role played by hyperons on the properties of neutron and proto-neutron stars with a special emphasis on the well-known “hyperon puzzle”, of which we discuss some of the solutions that have been proposed to tackle this problem. Finally, we review the role of hyperons on the cooling properties of newly born neutron stars and on the so-called r-mode instability.

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36

Biswal, S. K., Bharat Kumar, and S. K. Patra. "Effects of isovector scalar meson on neutron star both with and without hyperon." International Journal of Modern Physics E 25, no. 11 (November 2016): 1650090. http://dx.doi.org/10.1142/s0218301316500907.

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We study the effects of isovector-scalar ([Formula: see text])-meson on neutron and hyperon stars. Influence of [Formula: see text]-meson on both static and rotating stars is discussed. The [Formula: see text]-meson in a neutron star consisting of protons, neutrons and electrons, makes the equations of states (EOS) stiffer at higher density, and consequently increases the maximum mass of the star. But induction of [Formula: see text]-meson in the hyperon star decreases the maximum mass. This is due to the early evolution of hyperons in presence of [Formula: see text]-meson.

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37

Huber, H., M. K. Weigel, and F. Weber. "Compatibility of Neutron Star Masses and Hyperon Coupling Constants." Zeitschrift für Naturforschung A 54, no. 1 (January 1, 1999): 77–82. http://dx.doi.org/10.1515/zna-1999-0110.

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Abstract It is shown that the modern equations of state for neutron star matter based on microscopic calculations of symmetric and asymmetric nuclear matter are compatible with the lower bound on the maximum neutron-star mass for a certain range of hyperon coupling constants, which are constrained by the binding energies of hyperons in symmetric nuclear matter. The hyperons are included by means of the relativistic Hartree-or Hartree-Fock approximation. The obtained couplings are also in satisfactory agreement with hypernuclei data in the relativistic Hartree scheme. Within the relativistic Hartree-Fock approximation, hypernuclei have not been investigated so far.

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38

Tang, Tao, Heng Zhao, Duanke Liu, Xuewei Li, Kai Wang, Yan Li, and Mingwei Zhao. "Axial length to corneal radius of curvature ratio and refractive error in Chinese preschoolers aged 4–6 years: a retrospective cross-sectional study." BMJ Open 13, no. 12 (December 2023): e075115. http://dx.doi.org/10.1136/bmjopen-2023-075115.

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ObjectiveThis study aims to investigate the associations of axial length to corneal radius of curvature (AL/CRC) ratio with refractive error and to determine the effect of AL/CRC ratio on hyperopia reserve and myopia assessment among Chinese preschoolers.MethodsThis was a retrospective cross-sectional study that evaluated subjects aged 4–6 years. AL and CRC were obtained using a non-contact ocular biometer. Correlation analysis was performed to explore the associations of AL/CRC ratio with spherical equivalent refractive error (SER). The accuracy of AL/CRC ratio for hyperopia reserve and myopia assessment was analysed using cycloplegic refraction by drawing receiver operating characteristic (ROC) curves.ResultsThe analysis included 1024 participants (537 boys, 52.4%). The mean AL/CRC ratios in hyperopes, emmetropes and myopes were 2.90±0.06, 2.95±0.05 and 3.08±0.07, respectively. The SER was found to be more strongly correlated with AL/CRC ratio (ρ=−0.66, p<0.001) than either AL or CRC alone (ρ=−0.52, p<0.001; ρ=−0.03, p=0.33, respectively). AL/CRC was correlated with SER in hyperopes (ρ=−0.54, p<0.001), emmetropes (ρ=−0.33, p<0.001) and myopes (r=−0.67, p<0.001). For low hyperopia reserve assessment, the area under the ROC curves of AL/CRC ratio was 0.861 (95% CI 0.829 to 0.892), the optimal cut-off value of the AL/CRC ratio was ≥2.955. For myopia assessment, the area under the ROC curves of AL/CRC ratio was 0.954 (95% CI 0.925 to 0.982), the optimal cut-off value of the AL/CRC ratio was ≥2.975.ConclusionsThe SER showed a better correlation with AL/CRC ratio than either AL or CRC alone, especially in myopes, among children aged 4–6 years. These findings indicate that when cycloplegic refraction is unavailable, AL/CRC ratio could be used as an alternative indicator for identifying low hyperopia reserve and myopia among preschoolers, helping clinicians and parents screen children with low hyperopia reserve before primary school in a timely manner.

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39

Menou, Kristen. "Morpho-photometric redshifts." Monthly Notices of the Royal Astronomical Society 489, no. 4 (September 10, 2019): 4802–8. http://dx.doi.org/10.1093/mnras/stz2477.

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ABSTRACT Machine learning (ML) is one of two standard approaches (together with SED fitting) for estimating the redshifts of galaxies when only photometric information is available. ML photo-z solutions have traditionally ignored the morphological information available in galaxy images or partly included it in the form of hand-crafted features, with mixed results. We train a morphology-aware photometric redshift machine using modern deep learning tools. It uses a custom architecture that jointly trains on galaxy fluxes, colours, and images. Galaxy-integrated quantities are fed to a Multi-Layer Perceptron (MLP) branch, while images are fed to a convolutional (convnet) branch that can learn relevant morphological features. This split MLP-convnet architecture, which aims to disentangle strong photometric features from comparatively weak morphological ones, proves important for strong performance: a regular convnet-only architecture, while exposed to all available photometric information in images, delivers comparatively poor performance. We present a cross-validated MLP-convnet model trained on 130 000 SDSS-DR12 (Sloan Digital Sky Survey – Data Release 12) galaxies that outperforms a hyperoptimized Gradient Boosting solution (hyperopt+XGBoost), as well as the equivalent MLP-only architecture, on the redshift bias metric. The fourfold cross-validated MLP-convnet model achieves a bias δz/(1 + z) = −0.70 ± 1 × 10−3, approaching the performance of a reference ANNZ2 ensemble of 100 distinct models trained on a comparable data set. The relative performance of the morphology-aware and morphology-blind models indicates that galaxy morphology does improve ML-based photometric redshift estimation.

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40

Naseri, Hamed, Edward Owen Douglas Waygood, Bobin Wang, and Zachary Patterson. "Application of Machine Learning to Child Mode Choice with a Novel Technique to Optimize Hyperparameters." International Journal of Environmental Research and Public Health 19, no. 24 (December 15, 2022): 16844. http://dx.doi.org/10.3390/ijerph192416844.

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Travel mode choice (TMC) prediction is crucial for transportation planning. Most previous studies have focused on TMC in adults, whereas predicting TMC in children has received less attention. On the other hand, previous children’s TMC prediction studies have generally focused on home-to-school TMC. Hence, LIGHT GRADIENT BOOSTING MACHINE (LGBM), as a robust machine learning method, is applied to predict children’s TMC and detect its determinants since it can present the relative influence of variables on children’s TMC. Nonetheless, the use of machine learning introduces its own challenges. First, these methods and their performance are highly dependent on the choice of “hyperparameters”. To solve this issue, a novel technique, called multi-objective hyperparameter tuning (MOHPT), is proposed to select hyperparameters using a multi-objective metaheuristic optimization framework. The performance of the proposed technique is compared with conventional hyperparameters tuning methods, including random search, grid search, and “Hyperopt”. Second, machine learning methods are black-box tools and hard to interpret. To overcome this deficiency, the most influential parameters on children’s TMC are determined by LGBM, and logistic regression is employed to investigate how these parameters influence children’s TMC. The results suggest that MOHPT outperforms conventional methods in tuning hyperparameters on the basis of prediction accuracy and computational cost. Trip distance, “walkability” and “bikeability” of the origin location, age, and household income are principal determinants of child mode choice. Furthermore, older children, those who live in walkable and bikeable areas, those belonging low-income groups, and short-distance travelers are more likely to travel by sustainable transportation modes.

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Varley, Gary A., David Huang, Christopher J. Rapuano, Steven Schallhorn, Brian S. Boxer Wachler, and Alan Sugar. "LASIK for hyperopia, hyperopic astigmatism, and mixed astigmatism." Ophthalmology 111, no. 8 (August 2004): 1604–17. http://dx.doi.org/10.1016/j.ophtha.2004.05.016.

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42

Mantovani Sarti, Valentina. "Hyperon-nucleon femtoscopy, nuclear production and bearing on astrophysics." EPJ Web of Conferences 259 (2022): 05003. http://dx.doi.org/10.1051/epjconf/202225905003.

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The presence of hyperons in the inner core of neutron stars is still an open issue in astrophysics and the so-called hyperon puzzle is far away from being solved. A complete understanding of how the interaction between hyperons and nucleons, at the level of two- and three-body, behaves in vacuum and at finite baryon density is a key requirement in order to build a realistic Equation of State for matter inside the core of neutron stars. Recently, measurements of hadron-hadron correlation functions with the femtoscopy technique in small colliding systems delivered a large amount of precise data on several hyperonnucleon pairs. Several interactions relevant for the physics of neutron stars, such as pΛ and pΞ, have been compared to the femtoscopic data and the effects on the corresponding Equation of State have been investigated. The extension to the three-body forces with the measurement of correlations involving triplets and proton-deuteron pairs will provide for the first time access to the genuine three-body interaction and shed light on the hyperon-puzzle.

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43

Lubynets, Oleksii, Ilya Selyuzhenkov та Viktor Klochkov. "CBM Performance for Λ Hyperon Directed Flow Measurements in Au + Au Collisions at 12A GeV/c". Particles 4, № 2 (5 червня 2021): 288–95. http://dx.doi.org/10.3390/particles4020025.

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We present the current status of the performance studies of Λ hyperon directed flow measurement with the CBM experiment at the future FAIR facility in Darmstadt. Kalman Filter mathematics is used to reconstruct Λ→pπ− weak decay kinematics, while the Particle Finder Simple package is used to optimize criteria for Λ hyperon candidate selection. Directed flow of Λ hyperons is studied as a function of rapidity, transverse momentum and collision centrality. The effects on flow measurement due to non-uniformity of the CBM detector response in the azimuthal angle, transverse momentum and rapidity are corrected using the QnTools analysis framework.

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44

Rathod, Narendra. "The femtoscopy analysis of the p - Λ system obtained in heavy-ion collisions within the HADES experiment". EPJ Web of Conferences 291 (2024): 04005. http://dx.doi.org/10.1051/epjconf/202429104005.

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Abstract. The study investigates hyperons in dense matter, addressing the “hyperon puzzle" and its implications for neutron stars. Utilizing femtoscopy in Ag-Ag heavy-ion collisions at 1.58 AGeV within the HADES experiment, the analysis focuses on Λ (uds) strange quarks. By reconstructing Lambdas through Λ → π− + p decay, the study measures the p - Λ correlation function, revealing a distinct peak and providing valuable insights into strong interaction parameters. The initial exploration of the nucleon-hyperon (N-Y) femtoscopic correlation signal is presented, with a focus on the ongoing nature of the contribution as a work in progress.

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45

Yahya, Arifah Nur, Sharanjeet Sharanjeet-Kaur, and Saadah Mohamed Akhir. "Distribution of Refractive Errors among Healthy Infants and Young Children between the Age of 6 to 36 Months in Kuala Lumpur, Malaysia—A Pilot Study." International Journal of Environmental Research and Public Health 16, no. 23 (November 27, 2019): 4730. http://dx.doi.org/10.3390/ijerph16234730.

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Uncorrected refractive error, especially myopia, in young children can cause permanent visual impairment in later life. However, data on the normative development of refractive error in this age group is limited, especially in Malaysia. The aim of this study was to determine the distribution of refractive error in a sample of infants and young children between the ages of 6 to 36 months in a prospective, cross-sectional study. Cycloplegic retinoscopy was conducted on both eyes of 151 children of mean age 18.09 ± 7.95 months. Mean spherical equivalent refractive error for the right and left eyes was +0.85 ± 0.97D and +0.86 ± 0.98D, respectively. The highest prevalence of refractive error was astigmatism (26%), followed by hyperopia (12.7%), myopia (1.3%) and anisometropia (0.7%). There was a reduction of hyperopic refractive error with increasing age. Myopia was seen to emerge at age 24 months. In conclusion, the prevalence of astigmatism and hyperopia in infants and young children was high, but that of myopia and anisometropia was low. There was a significant reduction in hyperopic refractive error towards emmetropia with increasing age. It is recommended that vision screening be conducted early to correct significant refractive error that may cause disruption to clear vision.

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Kulikova, I. L., and K. A. Aleksandrova. "Comparative analysis of accommodative ability in children with hyperopia, anisometropia, amblyopia after femtolaser-assisted laser intrastromal keratomileusis." POINT OF VIEW. EAST – WEST, no. 3 (September 28, 2021): 44–46. http://dx.doi.org/10.25276/2410-1257-2021-3-44-46.

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Purpose. Analysis of the accommodative ability in children with hyperopic anisometropia, amblyopia of operated amblyopic and paired leading eyes after femtolaser-assisted laser intrastromal keratomileusis (FS-LASIK). Material and methods. In the 1st group were 20 children with hyperopic anisometropia and amblyopia after FS-LASIK. In the 2nd were children receiving conservative treatment. Results. After 6 months, when analyzing the accommodation, the coefficient of the accommodative response (CAR) of amblyopic eye in the 1st group was 0.05±0.07 conv. units, in the 2nd group was -0.1±0.19 conv. units (рm-u=0.03). The microfluctuation coefficient (CMF) of the amblyopic eye was increased, but the CMF of the paired leading eye in children after FS-LASIK approached the norm and amounted to 58.4±5.4 µF / min. In the conservative treatment group CMF remained high and was 60.8±4.44 µF / min (рm-u= 0.08). The objective accommodative response of the amblyopic eye in the 1st group increased by -1.13±0.03 diopters, in the 2nd group – by -0.82±0.48 diopters (рm-u=0.05). Conclusion. FS-LASIK helps to improve the accommodative ability in children with hyperopia, anisometropia and amblyopia. Key words: accommodation, hyperopia, anisometropia, amblyopia, FS-LASIK.

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47

Waldmann, Nicolas, Nadine Gerber, Warren Hill, and David Goldblum. "Cataract Surgery in High Hyperopia." Klinische Monatsblätter für Augenheilkunde 235, no. 04 (April 2018): 413–15. http://dx.doi.org/10.1055/s-0044-101010.

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Abstract Background Although cataract surgery is a well-established and standardised procedure, it can be demanding and associated with higher complication rates in high hyperopia. We present clinical data for highly hyperopic patients who underwent cataract surgery over a 12-year period (2005 – 2016) and at a single centre. Patients and Methods Out of a total of 11 434 cataract operations, 41 highly hyperopic eyes (SN60AT ≥ 31 dpt) were included for analysis. We compared the target spherical equivalent to the final postoperative spherical equivalent for five different formulas. We also reviewed the best corrected distance visual acuity (BCDVA) before and after surgery and any complications. Results LogMAR BCDVA increased significantly from a mean of 0.5 before to 0.37 after surgery (p = 0.02). The main reasons for the reduced final BCDVA were glaucoma, Fuchs corneal endothelial dystrophy, and age-related macular degeneration. One eye suffered a radial capsule tear and received a sulcus implanted intraocular lens (IOL). There was no statistically significant difference between formulas with respect to aberration of the final spherical equivalent. Conclusions Patients with high hyperopia often have ocular comorbidities. Such eyes may be surgically challenging, resulting in reduced benefits from cataract surgery compared to normal eyes.

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Zyla, P. "SEARCH FOR DIRECT CP VIOLATION IN HYPERON DECAYS." International Journal of Modern Physics A 16, supp01b (September 2001): 684–86. http://dx.doi.org/10.1142/s0217751x01007790.

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Fermilab experiment E871, HyperCP, is designed to search for evidence of direct CP violation in Cascade and Lambda hyperon decays. The asymmetry of the angular distribution of the proton in the Lambda helicity frame between Ξ-→Λ+π-, Λ→p+π- and the charge-conjugate decays, will be measured. During the 1997 and 1999 fixed target runs at Fermilab HyperCP collaboration collected billions of Cascade and anti-Cascade decays that would make it possible to probe this asymmetry at the 10-4 statistical level. The status of the data analysis is described.

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49

Schaeffel, Frank, David Troilo, Josh Wallman, and Howard C. Howland. "Developing eyes that lack accommodation grow to compensate for imposed defocus." Visual Neuroscience 4, no. 02 (February 1990): 177–83. http://dx.doi.org/10.1017/s0952523800002327.

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AbstractThe eyes of growing chicks adjust to correct for myopia (eye relatively long for the focal length of its optics) or hyperopia (eye relatively short for the focal length of its optics). Eyes made functionally hyperopic with negative spectacle lenses become myopic and long, whereas eyes made functionally myopic with positive spectacle lenses become hyperopic and short. We report here that these compensatory growth adjustments occur not only in normal eyes but also in eyes unable to accommodate (focus) because of lesions to the Edinger-Westphal nuclei. Thus, at least in chicks, accommodation is not necessary for growth that reduces refractive errors during development, and may not be necessary for the normal control of eye growth.

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Meduri, Alessandro, Federica Alessandrello, Miguel Rechichi, and Pasquale Aragona. "Transepithelial photorefractive keratectomy for the management of hyperopic regression after conductive keratoplasty." BMJ Case Reports 14, no. 4 (April 2021): e241144. http://dx.doi.org/10.1136/bcr-2020-241144.

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Анотація:

Several refractive techniques are available for the treatment of hyperopia. Conductive keratoplasty (CK) is a safe and non-ablative procedure suitable for the treatment of low hyperopia and presbyopia. Due to the high rate of regression, it is not a commonly used technique. There is minimal literature about the use of refractive procedures for the treatment of hyperopic regression after CK. We report a case of a 49-year-old man who had undergone bilateral CK 15 years before for the correction of his hyperopia. He experienced a regression, with sph +2.75 cyl −0.50(20) in the right eye and sph +2.50 cyl −0.75(170) in the left eye. Transepithelial photorefractive keratectomy (tPRK) was performed with Schwind Amaris 750 s. After 12 months, his best-corrected visual acuity was 20/20, with −0.25 sph in both eyes. To the best of our knowledge, this is the first reported case of tPRK performed after CK.

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