Results 31 to 40 of about 282,915 (147)

Comparison of prediction accuracy of five different biometric formulas

open access: yesRevista Brasileira de Oftalmologia, 2021
Objective To compare the performance of Sanders-Retzlaff-Kraft/Theoretical, Hoffer Q, Barrett Universal II, Kane, and Hill-radial basis function formulas to calculate intraocular lens power in eyes with normal axial length, in terms of predicting target
Adem Uğurlu   +2 more
doaj   +1 more source

The hybrid power mean of quartic Gauss sums and Kloosterman sums

open access: yesOpen Mathematics, 2017
The main purpose of this paper is using the analytic method and the properties of the classical Gauss sums to study the computational problem of one kind fourth hybrid power mean of the quartic Gauss sums and Kloosterman sums, and give an exact ...
Xiaoxue Li, Jiayuan Hu
doaj   +1 more source

The hybrid power mean of the quartic Gauss sums and the two-term exponential sums

open access: yesAdvances in Difference Equations, 2018
In this paper, we use the analytic method and the properties of classical Gauss sums to study the computational problems of one kind hybrid power mean of quartic Gauss sums and two-term exponential sums, and give an interesting fourth-order linear ...
Xiaoxue Li
doaj   +1 more source

Cold water immersion of the hand and forearm during half-time improves intermittent exercise performance in the heat

open access: yesFrontiers in Physiology, 2023
The present study aimed to investigate the effect of cold water immersion of the hand and forearm during half-time (HT) on intermittent exercise performance and thermoregulation by imitating intermittent athletic games in the heat.
Manami Iwahashi   +4 more
doaj   +1 more source

On the recursive properties of one kind hybrid power mean involving two-term exponential sums and Gauss sums

open access: yesOpen Mathematics, 2018
The main purpose of this paper is to study the computational problem of one kind hybrid power mean involving two-term exponential sums and quartic Gauss sums using the analytic method and the properties of the classical Gauss sums, and to prove some ...
Shen Shimeng
doaj   +1 more source

Selected Indices of Anaerobic Capacity and Their Changes during Special Judo Fitness Tests at Different Ambient Temperatures Performed among Judo Athletes

open access: yesApplied Sciences, 2022
Background: Thermoregulatory processes play an important role during athletic competition. When athletes compete in an elevated ambient temperature, metabolic processes in their bodies become intensified.
Tomasz Pałka   +8 more
doaj   +1 more source

Power Purchasing Agreement in the Framework of Civil Law [PDF]

open access: yesحقوق فناوریهای نوین, 2020
Power purchasing agreements (PPA) seek to protect and develop electricity production specifically some kinds like renewable and green electricity. They have been common after restructuring electricity industrial.
Kiomars Heidari   +2 more
doaj   +1 more source

A comparative study of five numerical methods for the estimation of Weibull parameters for wind energy evaluation at Eastern Jerusalem, Palestine

open access: yesEnergy Reports, 2022
Wind power provides a clean and feasible solution to generate electricity. The development of wind power applications requires a deep analysis of wind profiles and an accurate prediction of wind energy at a study site. This work explores the distribution
Husain R. Alsamamra   +3 more
doaj   +1 more source

On the fourth power mean of the analogous general Kloosterman sum

open access: yesJournal of Number Theory, 2016
The authors study generalized Kloosterman sums \[ C(m,n,k,\chi;q)= \sum_{a=1}^{q}\chi(a)e\left(\frac{m\bar a^k+na}{q }\right), \] where \(q\), \(m\), \(n\), \(k\) are given positive integers, \(q \geq 3\), \(e(x)=e^{2\pi i x}\), \(a\bar a\equiv 1\pmod{q}\) and \(\chi\) is a character \(\mod{q}\).
Chen, Hui, Zhang, Tianping
openaire   +2 more sources

On the Mean Values of Certain Character Sums

open access: yesAbstract and Applied Analysis, 2013
Let q≥5 be an odd number. In this paper, we study the fourth power mean of certain character sums ∑χmodq,χ-1=-1*∑1≤a≤q/4aχa4 and ∑χmodq,χ-1=1*∑1≤a≤q/4aχa4, where ∑‍* denotes the summation over primitive characters modulo q, and give some asymptotic ...
Zhefeng Xu, Huaning Liu
doaj   +1 more source

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