Generalized (U, M)-derivations of completely semiprime r-rings

Rahman, Mizanor; Paul, Akhil Chandra

doi:10.3329/jbas.v39i1.23665

Cited by 4 publications

(8 citation statements)

References 11 publications

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“…Therefore, polarization was lagging behind the applied electric field at higher frequency. Substitution of larger ionic radii Ce 3? at the site of Fe [25][26][27] that substitution of lager rare earth ion substitution into Cobalt ferrite or Nickel ferrite lattice shows the similar behavior of increase in resistivity and the dielectric constant with increase in dopant concentration [28][29][30]. For x = 0.03 composition of the sample the high value of dielectric constant is obtained in the present investigation.…”

Section: Resultssupporting

confidence: 57%

Effect of Ce3+ substitution on the structural, morphological, dielectric, and impedance spectroscopic studies of Co–Ni ferrites for automotive applications

et al. 2019

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Cerium (Ce 3? )-substituted cobalt-nickel (Co-Ni) ferrite nanostructures of spinel cubic phase with space group Fd 3m had been successfully engineered by solution combustion route. The effect of Ce 3? substitution on the structural, morphological, dielectric, and impedance spectroscopic investigations are probed by using X-ray diffraction (XRD), scanning electron microscope (SEM), and impedance analysis, respectively. Rietveld refinement of XRD data reveal that samples exhibit well-crystalline nature with single phase. The microstructural realm with various Ce 3? doping levels has been identified from SEM micrographs. The replacement of Fe 3? by Ce 3? cations has been confirmed by using energydispersive analysis of the ferrite samples. The dielectric constant (e 0 ), dielectric loss (tand), ac conductivity (r ac ), and impedance (Z 0 and Z 00 ) at room temperature is investigated as a function of frequency, respectively. The variation of dielectric properties e 0 , tand, r ac with frequency are explained by Maxwell-Wagner type of interfacial polarization and the hopping of charge between Fe 2? and Fe 3? as well as the dopant ions at B-sites. The decrease in dielectric constant and dielectric loss tangent with frequency follows the phenomenon of Debye's relaxation. The enhancement in AC conductivity with frequency is proportional to Ce 3? concentration which follows Jonscher law. The complex impedance plots (Z 0 vs. Z 00 ) allows to determine the contribution for conductivity either from grain or grain boundary. Complex electric modulus plot (M 0 vs. M 00 ) provides the validation to the result drawn from the complex impedance plots. The results indicate the existence of non-Debye type of relaxation in these ferrites. Impedance spectroscopy allows the ferrite materials to estimate electrical properties which arise due to hopping and relaxation phenomena.

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Section: Resultssupporting

confidence: 57%

Effect of Ce3+ substitution on the structural, morphological, dielectric, and impedance spectroscopic studies of Co–Ni ferrites for automotive applications

et al. 2019

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“…In Bangladesh, surface water is mostly used for transportation, fishing, agriculture, and as a source of drinking water. Surface water resources of the country comprise river flow, water on standing water bodies (e.g., lake and pond), water on seasonal wetlands, as well as instream storage . Bangladesh has a total of 230 rivers, which with their numerous tributaries and distributaries have a total length of around 24,140 km and cover roughly 7% of Bangladesh’s surface area .…”

Section: Water Resourcesmentioning

confidence: 99%

“…The Meghna River, one of the widest rivers of the country, runs entirely inside the boundaries of Bangladesh. The enriched ecosystem of the GMB Delta has long supported a high population density, which relies heavily on its agricultural and fisheries systems. , Annually, 795,000 million m 3 of surface water are discharged through the Ganges–Brahmaputra system, down-gradient of the confluence of the Ganges and the Brahmaputra, and every year, the Bay of Bengal receives the combined volume of inflows and runoff that remains unconsumed (i.e., 1373 km 3 ). , As a result, the availability of water is plummeting due to a shortage of water in surface water bodies and groundwater due to less recharge. If the current climatic trend continues, the Barind tract, a distinct uplifted agro-ecological zone in Northwest Bangladesh, will experience extreme scarcity of water and high atmospheric temperature in the near future. − Therefore, immediate necessary actions need to be taken.…”

Section: Water Resourcesmentioning

confidence: 99%

“…Across the country, during the wet season, the shallow groundwater table rises near the surface due to heavy precipitation and inundation, whereas over the dry season, water tables fall because of extensive water withdrawals and river discharges, which exhaust the groundwater resources. Groundwater tables are at their deepest during the premonsoon season (April to May) and at their shallowest during the postmonsoon season (November). ,, …”

Section: Water Resourcesmentioning

confidence: 99%

“…All of the major rivers of Bangladesh originate outside the country and traverse across the country through 57 transboundary rivers . In particular, a majority of Bangladesh’s rivers originate in India and enter from the north before flowing south and emptying into the Bay of Bengal.…”

Section: Water Resourcesmentioning

confidence: 99%

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Bangladesh: Climate Change Issues, Mitigation, and Adaptation in the Water Sector

Haque

Nahar

2023

ACS EST Water

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Wide-ranging impacts of a changing climate are already being documented in many parts of Bangladesh, recognized globally as one of the most susceptible countries to the influences of climate change. Bangladesh's water sector infrastructures are expected to experience substantial damages due to more frequent and/or more intense floods and extreme weather events. Particularly, the southern portion of the country faces severe risk due to climate change induced susceptibility and various socioeconomic and environmental barriers that are hindering sustainable adaptation. The primary goal of this review is to produce a comprehensive study on climate change impacts, mitigation, and adaptation in the water sector in Bangladesh. In the past, numerous researchers have studied climate change impacts, mitigation, and adaptation strategies in Bangladesh; however, comparatively few studies attempted to determine the overall efficacy of adaptation measures implemented at the local and national levels. This paper is the outcome of a systematic review of relevant scholarly and nonscholarly materials, and it offers a deeper insight into Bangladesh's climate change mitigation and adaptation strategies.

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Strain effect on the high T _c superconductor YBa₂Cu₃O₇: an ab initio study comparing bulk and monolayer models

Yelpo

Favre²,

Ariosa

et al. 2023

Electron. Struct.

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In this work, the effect of strain on the vibrational and electronic properties of the YBa2Cu3O7(YBCO) compound was studied through \textit{ab initio} calculations. For this, two structural models were used: a bulk model and a surface model (a monolayer with CuO2 and BaO as the terminating layers). The phonon spectra was calculated for both structures under different levels of c axis strain. The most appreciable change occurs in the vibrational properties, and in the surface case. From the simulation of the Raman spectra, we were able to quantify the Raman shift ratio as a function of the applied strain, and analyzed its behavior in terms of the overlap population of the different bonds and the reduced mass of selected phonons. The effect of the level of deformation on the band structure and the electronic density of states is small for both structures, although more noticeable in the case of the surface model. In both cases, tendencies are observed when the fine features of the band structure are analyzed by means of the tight binding model. Due to the lower symmetry, the surface model also shows modifications of the bands related to the CuO2 planes.

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Generalized (U, M)-derivations of completely semiprime r-rings

Cited by 4 publications

References 11 publications

Effect of Ce3+ substitution on the structural, morphological, dielectric, and impedance spectroscopic studies of Co–Ni ferrites for automotive applications

Effect of Ce3+ substitution on the structural, morphological, dielectric, and impedance spectroscopic studies of Co–Ni ferrites for automotive applications

Bangladesh: Climate Change Issues, Mitigation, and Adaptation in the Water Sector

Strain effect on the high T _c superconductor YBa₂Cu₃O₇: an ab initio study comparing bulk and monolayer models

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Generalized (U, M)-derivations of completely semiprime r-rings

Cited by 4 publications

References 11 publications

Effect of Ce3+ substitution on the structural, morphological, dielectric, and impedance spectroscopic studies of Co–Ni ferrites for automotive applications

Effect of Ce3+ substitution on the structural, morphological, dielectric, and impedance spectroscopic studies of Co–Ni ferrites for automotive applications

Bangladesh: Climate Change Issues, Mitigation, and Adaptation in the Water Sector

Strain effect on the high T c superconductor YBa2Cu3O7: an ab initio study comparing bulk and monolayer models

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Product

Resources

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Strain effect on the high T _c superconductor YBa₂Cu₃O₇: an ab initio study comparing bulk and monolayer models