Results 111 to 120 of about 279,095 (244)

Mathematical Application In Determining Qibla Direction Of Tamhidi Centre Universiti Sains Islam Malaysia (USIM) By Using Spherical Trigonometry

open access: yes, 2022
The direction of the Qibla is the direction of the city of Makkah which is one of the legal conditions for performing prayer. Spherical trigonometry a branch of Mathematics plays a critical role in determining the direction of Qibla.
Nur Idayu Ah Khaliludin   +5 more
core  

Interest Rate Pegs and the Reversal Puzzle: On the Role of Anticipation

open access: yesJournal of Money, Credit and Banking, EarlyView.
Abstract We revisit the reversal puzzle: a counterintuitive contraction of inflation in response to an interest rate peg. We show that its occurrence is intimately related to the degree of agents' anticipation. If agents perfectly anticipate the peg, reversals occur depending on the duration of the peg.
RAFAEL GERKE   +2 more
wiley   +1 more source

Pose determination from angles and relative line lengths using spherical trigonometry

open access: yes, 1999
This article describes a two-step approach to pose determination using spherical trigonometry. Line directions are initially determined in the eye co-ordinate system, and then used to determine the pose of the eye system as a Perspective-4-Points problem.
Pan, Xiang, Lane, David M.
core   +1 more source

Beyond single cells: Ten years of commercial lattice light‐sheet microscopy

open access: yesJournal of Microscopy, EarlyView.
Abstract Lattice light‐sheet microscopy (LLSM) enables gentle, rapid, volumetric fluorescence imaging of living biological systems. The technique employs Bessel beam interference to produce a light‐sheet which retains its thickness over a relatively large field‐of‐view compared to other light‐sheets.
Helena L. E. Coker, David S. Corcoran
wiley   +1 more source

On elliptical trigonometry

open access: yes, 2019
The ordinary trigonometric functions are defined by means of angles and lengths on the unit circle. There are several derivatives of classical trigonometric functions such as hyperbolic, polar, spherical, Fourier, inverse, log, complex, q-versions etc ...
Tal, O., Cangül, I., Başol, K.
core   +1 more source

Post‐hatching development of the remote‐tactile bill‐tip organ in precocial shorebirds (Scolopacidae)

open access: yesJournal of Anatomy, EarlyView.
Juvenile scolopacid shorebirds possess well‐developed osteological correlates of tactile bill‐tip organs, indicating sensory systems for remote‐touch foraging are present from early life. Ontogenetic changes in bill‐tip morphology suggest ecological specialisation and interspecific variation develop later, after fledging in these highly precocial ...
Carla J. du Toit   +2 more
wiley   +1 more source

The Accuracy Smoothness Dilemma in Prediction: A Novel Multivariate M‐SSA Forecast Approach

open access: yesJournal of Time Series Analysis, EarlyView.
ABSTRACT Forecasting presents a complex estimation challenge, as it involves balancing multiple, often conflicting, priorities and objectives. Conventional forecast optimization methods typically emphasize a single metric, such as minimizing the mean squared error (MSE), which may neglect other crucial aspects of predictive performance. To address this
Marc Wildi
wiley   +1 more source

Testing for Bivariate Spherical Symmetry [PDF]

open access: yes
An omnibus test for spherical symmetry in R2 is proposed, employing localized empirical likelihood. The thus obtained test statistic is distri- bution-free under the null hypothesis. The asymptotic null distribution is established and critical values for
Gantner, M., Einmahl, J.H.J.
core  

Parametric Time‐Variation in the Unconditional Volatility: Estimation and Inference

open access: yesJournal of Time Series Analysis, EarlyView.
ABSTRACT We propose modeling time‐variation in the unconditional volatility by augmenting the standard GARCH model by a deterministic time‐varying intercept. The model, called the additive time‐varying (ATV‐)GARCH model, can be interpreted as a reduced form of a model including covariates and can be derived from a multiplicative decomposition of ...
Niklas Ahlgren   +2 more
wiley   +1 more source

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