Determination Of Ho Research Articles

Pengaruh Penggunaan Media Video Animasi Terhadap Hasil Belajar Matematika Kelas IV SD

This article discusses a study which aims to determine the effect of using animated video media on mathematics learning outcomes in class IV students at SDN 01 Air Tawar Barat. The research used in this research is a quasi-experiment in the form of a Post-test Only Control Group research design. This design involves 2 classes, namely class IV A as a control class with 32 students and class IV B as an experimental class with 32 students. The data collection process was carried out by giving a post test to the two classes. To determine the research results, the T test formula is used. The determination of Ho is rejected if Tcount > Ttable and Ho is accepted if Tcount < Ttable. The results of the calculation test in the research stated that Tcount was 7.391 and Ttable was 1.999 at a significance level (α) of 0.05. Because Tcount > Ttable is 7.391 > 1.999, it can be concluded that there is an influence of the use of animated video media on mathematics learning outcomes for class IV students.

N1,N2-Bis[1-(2-hydroxyphenyl)methylidene]ethanedihydrazide as a neutral ionophore for preparation of a new Ho3+ PVC-membrane sensor

N1,N2-Bis[1-(2-hydroxyphenyl)methylidene]ethanedihydrazide (MEH) was used as new compound which plays the role of an excellent ion carrier in the fabrication of a Ho(III) membrane electrode. The electrode shows a good selectivity for Ho(III) ion with respect to most common cations including alkali, alkaline earth, transition and heavy metal ions. This electrode has a wide linear dynamic range from 1.0 × 10−6 to 1.0 × 10−2 mol/L with a Nernstian slope of 19.8 ± 0.3 mV per decade and a low detection limit of 5.8 × 10−7 mol/L in the pH range of 2.5–9.8, while the response time was rapid (<10 s). The suggested sensor was applied to the determination of Ho(III) ions in tap water and river water samples.

A Novel Holmium(III) Membrane Sensor Based on N‐(1‐Thien‐2‐Ylmethylene)‐1,3‐Benzothiazol‐2‐Amine

A novel plasticized membrane sensor for Ho(III) ions based on N‐(1‐thien‐2‐ylmethylene)‐1,3‐benzothiazol‐2‐amine (TBA) as a neutral carrier was prepared. The best performance was obtained with a membrane composition of 31% PVC, 61% benzyle acetate, 2% sodium tetra phenyl borate and 6% carrier. The electrode exhibits a Nernstian response for Ho(III) ions over a particular concentration range (1.0×10−5−1.0×10−2 M) with a slope of 19.7±0.2 mV decade−1. The limit of the detection is 7.0×10−6 M. The sensor has a response time of <15 s and a useful working pH range of 4.0–9.5. The proposed sensor discriminates relatively well towards Ho(III) ions with regard to common alkali, alkaline earth, and specially lanthanide ions. It was successfully applied as an indicator electrode in a potentiometric titration of Ho(III) ions with EDTA. It was also applied in determination of fluoride ions in a mouth wash preparation. The proposed sensor was applied for the determination of Ho(III) ion concentration in binary mixtures.

Spectral interference in the determination of Ho, Tm and Ga as dopants in single crystals of potassium titanylphosphate by inductively coupled plasma atomic emission spectrometry

The present article discusses the spectral interferences affecting the determination of Ga, Ho and Tm as dopants in single crystals of potassium titanylphosphate (KTiOPO 4) by inductively coupled plasma atomic emission spectrometry (ICP-AES). The Q concept, as proposed by Boumans and Vrakking [Spectrochim. Acta Part B 43 (1988) 69] was used for this study, which covers: (a) spectral data for potassium, titanium and phosphorous as interferents (at a concentration of 4 mg/ml) in 400 pm wide spectral windows around the prominent lines of the analytes; (b) a database of Q values for line interferences ( Q I) and for wing interferences ( Q W); and (c) the interelement interferences in doubly doped crystals of KTP.

Effects Of Large-Scale Structure Upon The Determination Of Ho From Time Delays

We have analyzed the effects of both large-scale inhomogeneities in the mass distribution and cosmological gravitational waves upon the time delay between two images in a gravitational lens system. We have shown that their leading order effect, which could potentially bias the determination of the Hubble parameter, is indistinguishable from a change in the relative angle between the source and the lens axis. Since the absolute angular position of the source is not directly measurable, nor does it enter the relationship between the Hubble parameter and the lens observables, the determination of Ho from gravitational lens time delays follows in the usual way, as if the metric perturbations were absent.

Estimator design for bilinear systems with bounded inputs

Abstract Full state estimator design for both continuous‐time and discrete‐time bilinear systems is investigated. All of the system inputs are arbitrary deterministic signals with known upper bounds. We propose a sufficient condition to determine the estimator's gain matrix parameters Ho and Hi such that all the original unavailable system states are approximated asymptotically. This result is derived via the Lyapunov stability theorem and is expressed by the measurements (norm and matrix measure) of the system matrices. The main feature of this result is that in our determination of Ho and Hi, we do not need to solve any Lyapunov equations.