432 research outputs found
Invaluable CTD and Mixed Layer Depth data in northern coast of the Bay of Bengal
No full textThese CTD (Conductivity, Temperature, and Depth) profiles were collected by the help of the Bangladesh Navy by allowing boarded on BNS Sangu under the research project "Evaluation of Satellite-Derived Ocean Chlorophyll-a in the EEZ of Bangladesh" funded by the University Grant Commission, Bangladesh. The datasets contain the CTD profiles which ultimately give the vertical distributions of highly precise ocean temperature (°C), salinity (PSU), density (kg m-3), with the corresponding depth levels. The salinity and density were derived from the conductivity sensor and the depth further estimated by the pressure sensor, where it was considered as 1 dbar pressure almost equal to 1 m depth (in the shallow water). Later on, the Mixed Layer Depth was calculated based on the density threshold criteria where the density difference of 0.2 kg per cubic meter was considered to get the Mixed Layer Depth. Then the binary files (.srd) from the CTD (CTD90M HYDRO-BIOS Apparatebau GmbH, Germany) were processed as comma-separated-values (.csv) files by the data processing software SST-SDA provided by Sea & Sun Technology GmbH, Germany. However, these datasets were for 12 stations. The stations' latitude and longitude are attached here in a text file named "Station_information.txt". Mixed Layer Depth values are included in the MLD.txt file
Invaluable CTD and Mixed Layer Depth data in northern coast of the Bay of Bengal
No full textThese CTD (Conductivity, Temperature, and Depth) profiles were collected with the help of the Bangladesh Navy by allowing boarded on BNS Sangu under the research project "Evaluation of Satellite-Derived Ocean Chlorophyll-a in the EEZ of Bangladesh" funded by the University Grant Commission, Bangladesh. The datasets contain the CTD profiles which ultimately give the vertical distributions of highly precise ocean temperature (°C), salinity (PSU), density (kg m-3), with the corresponding depth levels. The salinity and density were derived from the conductivity sensor and the depth further estimated by the pressure sensor, where it was considered as 1 dbar pressure almost equal to 1 m depth (in the shallow water). Later on, the Mixed Layer Depth was calculated based on the density threshold criteria where the density difference of 0.2 kg per cubic meter was considered to get the Mixed Layer Depth. Then the binary files (.srd) from the CTD (CTD90M HYDRO-BIOS Apparatebau GmbH, Germany) were processed as comma-separated-values (.csv) files by the data processing software SST-SDA provided by Sea & Sun Technology GmbH, Germany. However, these datasets were for 12 stations. The stations' latitude and longitude are attached here in a text file named "Station_information.txt". Mixed Layer Depth values are included in the MLD.txt file
Music and Art in Tareque and Catherine Masud\u27s Film Muktir Gaan
No full textTHE ROLE OF MUSIC AND ART IN TAREQUE AND CATHERINE MASUD\u27S FILM MUKTIR GAAN The Bangladeshi documentary Muktir Gaan (Song of Freedom)(1) by Tareque & Catherine Masud earned international recognition as did the directors\u27 autobiographical Maatir Moyna (Clay Bird).(2) The statement of the juries of Film South Asia \u2797 reads: \u27For its powerful recreation of the euphoria of an event long forgotten by the world, the Jury would like to make a Special Mention of the film Muktir Gaan by Tareque and Catherine Masud.\u27(3) The euphoria of victory brought by Bangladesh\u27s Liberation War against Pakistan in 1971 was an event of profound political significance. The author aims to shed light on the form of realism the documentary presents, which is enhanced by its remarkable use of music and cinematic techniques. The discussion also brings out the question of cultural resistance of the Bengalis in what was..
A Review on Characteristics, Techniques, and Waste-to-Energy Aspects of Municipal Solid Waste Management: Bangladesh Perspective
No full textMunicipal solid waste (MSW) management has become a major concern for developing countries. The physical and chemical aspects of MSW management and infrastructure need to be analyzed critically to solve the existing socio-economic problem. Currently, MSW production is 2.01 billion tonnes/yr. In developing countries, improper management of MSW poses serious environmental and public health risks. Depending on the socio-economic framework of a country, several MSW management procedures have been established, including landfilling, thermal treatment, and chemical treatment. Most of the MSW produced in underdeveloped and developing countries such as Bangladesh, India, and Pakistan is dumped into open landfills, severely affecting the environment. Waste-to-Energy (WTE) projects based on thermal treatments, e.g., incineration, pyrolysis, and gasification, can be feasible alternatives to conventional technologies. This research has explored a comprehensive method to evaluate MSW characteristics and management strategies from a global and Bangladesh perspective. The benefits, challenges, economic analysis, and comparison of MSW-based WTE projects have been analyzed concisely. Implementing the WTE project in developing countries can reduce unsupervised landfill and greenhouse gas (GHG) emissions. Alternative solutions and innovations have been discussed to overcome the high capital costs and infrastructural deficiencies. By 2050, Bangladesh can establish a total revenue (electricity sales and carbon credit revenue) of USD 751 million per year in Dhaka and Chittagong only. The landfill gas (LFG) recovery, waste recycling. and pyrolysis for energy production, syngas generation, and metal recovery are possible future directions of MSW management. The MSW management scenario in developing countries can be upgraded by improving waste treatment policies and working with government, academicians, and environmentalists together
Exploring the new physics phases in 3+1 scenario in neutrino oscillation experiments
No full text© 2021, The Author(s).The various global analyses of available neutrino oscillation data indicate the presence of the standard 3 + 0 neutrino oscillation picture. However, there are a few short baseline anomalies that point to the possible existence of a fourth neutrino (with mass in the eV-scale), essentially sterile in nature. Should sterile neutrino exist in nature and its presence is not taken into consideration properly in the analyses of neutrino data, the interference terms arising due to the additional CP phases in presence of a sterile neutrino can severely impact the physics searches in long baseline (LBL) neutrino oscillation experiments. In the current work we consider one light (eV-scale) sterile neutrino and probe all the three CP phases (δ13, δ24, δ34) in the context of the upcoming Deep Underground Neutrino Experiment (DUNE) and also estimate how the results improve when data from NOvA, T2K and T2HK are added in the analysis. We illustrate the ∆χ2 correlations of the CP phases among each other, and also with the three active-sterile mixing angles. Finally, we briefly illustrate how the relevant parameter spaces in the context of neutrinoless double beta decay get modified in light of the bounds in presence of a light sterile neutrino.11Nsciescopu
Development and application of semi-empirical interatomic potentials to study interface faceting and fracture
No full textGrenzflächen haben einen starken Einfluss auf die Eigenschaften von Materialien. Multi- (mc-) und polykristallines Silizium ist ein Prototypsystem, das die Bedeutung von Grenzflächen wie Korngrenzen (GBs) für die elektronischen Eigenschaften des Materials sowie deren technologische Implikationen demonstriert. GBs sowie ihre Wechselwirkung mit Verunreinigungen sind einer der Hauptbegrenzungsfaktoren der Effizienz von Solarzellenvorrichtungen auf mc-Si-Basis. In diesem Fall werden diese Eigenschaften durch ein komplexes Zusammenspiel zwischen Mikrostruktur, Facetten- und Verunreinigungssegregationsenergien und langreichweitigen Dehnungswechselwirkungen bestimmt. In Strukturmaterialien steuern Oberflächen und Grenzflächen die Festigkeit und den Bruch der Materialien. Beispielsweise ist die Energiefreisetzungsrate durch die Bildung einer zusätzlichen freien Oberfläche bei der Rissausbreitung ein entscheidender Parameter, der den Sprödbruch steuert. Der Rheniumeffekt kann als charakteristisches Beispiel angesehen werden, das das oben Gesagte unterstreicht: Kriech- und Ermüdungseigenschaften von Superlegierungen auf Ni-Basis werden durch die Zugabe von einigen Gew.-% Re erheblich verbessert. Ein tiefgreifendes Verständnis dieses Effekts wird jedoch noch diskutiert. In der vorliegenden Arbeit wurden 2NN-MEAM-Potentiale für Si, C, SiC, Ni, Re und NiRe entwickelt. Unter Verwendung dieser Potentiale wurden Grenzflächen und C-Seigerung an Linienübergängen in Si und Bruch in Ni- und Ni1xRex-Legierungen untersucht. Diese Arbeiten adressieren erfolgreich bisher offene Fragen und liefern neue Einblicke in die Mechanismen, die GB-Facettierung und -Segregation steuern.Interfaces have a strong impact on the properties of materials. Multi- (mc-) and poly-crystalline Silicon is a prototype system that demonstrates the importance of interfaces, such as grain boundaries (GBs), on the materials electronic properties as well their technological implications. GBs as well as their interaction with impurities are one of the major limiting factors of the efficiency of mc-Si based solar cell devices. In this case, these properties are governed by a complex interplay between microstructure, facet and impurity segregation energies, and long-range strain interactions. In structural materials, surfaces and interfaces control materials strength and fracture. For example, the energy release rate by the formation of an extra free surface upon crack propagation is a decisive parameter that controls brittle fracture. The rhenium effect can be considered as a characteristic example that highlights the aforementioned: Creep and fatigue properties of Ni-based superalloys are considerably improved by the addition of a few wt% Re. However, a deep understanding of this effect is still under debate. In the present thesis, 2NN-MEAM potentials for Si, C, SiC, Ni, Re, and NiRe have been developed. Employing these potentials, interfaces, and C segregation at line junctions in Si and fracture in Ni and Ni1xRex alloys have been investigated. These works successfully address hitherto open questions and provide new insights on the mechanisms governing GB faceting and segregation.Md. Masud Alam ; Chairperson: Prof. Dr. Jörg Lindner, Referee: Prof. Dr. Jörg Neugebauer, Referee: Prof. Dr. Wolf Gero Schmidt, Member: Dr. Matthias ReicheltTag der Verteidigung: 30.08.2022Universität Paderborn, Dissertation, 202
sj-xlsx-1-hol-10.1177_09596836231163492 – Supplemental material for A 2600-yr multiproxy record for climate and vegetation reconstruction along the Mahanadi River delta, east coast of India
No full textSupplemental material, sj-xlsx-1-hol-10.1177_09596836231163492 for A 2600-yr multiproxy record for climate and vegetation reconstruction along the Mahanadi River delta, east coast of India by Pujarini Samal, Saradambal Ramchandaran Subramanian, Jyoti Srivastava, Masud Kawsar, Madhusudanan Chandrika Manoj, Gundiga Puttojirao Gurumurthy, Mohd Munazir Chauhan, Sajid Ali, Mahboob Alam, Anupam Sharma, Partha Sarathi Jena, Ajay Shivam and Ravi Bhushan in The Holocene</p
Introduction: Must We Burn Masud Khan?
No full textFree access to the published article is kindly provided by Edinburgh University Press online at: https://www.euppublishing.com/doi/abs/10.3366/pah.2024.0506 .Following the publication of a first instalment of the 39 Work Books of M. Masud R. Khan in November 2022 and the recent donation to the Freud Museum London of the full original correspondence between Khan and Wladimir Granoff, and between Khan and Victor Smirnoff, this essay serves the dual purpose of ensuring that Khan’s memory is being kept alive and informing its readership of the newly available archival documents. It briefly retraces the history of Khan’s conflicts with the British Psychoanalytical Society up to the destruction, in July 2019, of the Khan archives that were in the possession of the International Psychoanalytical Association. In addition, the author recounts how he came into possession of the letters Khan exchanged with Granoff and Smirnoff, and why it was decided to establish a Khan archive at the Freud Museum London. The prospect of this new archive being supplemented with the letters from Khan to his second wife, Svetlana Beriosova, and a full copy of the Work Books is also discussed
Evolution of neutrino mass-mixing parameters in matter with non-standard interactions
No full text© 2021, The Author(s).We explore the role of matter effect in the evolution of neutrino oscillation parameters in the presence of lepton-flavor-conserving and lepton-flavor-violating neutral-current non-standard interactions (NSI) of the neutrino. We derive simple approximate analytical expressions showing the evolution of mass-mixing parameters in matter with energy in the presence of standard interactions (SI) and SI+NSI (considering both positive and negative values of real NSI parameters). We observe that only the NSI parameters in the (2,3) block, namely εμτ and (γ − β) ≡ (εττ− εμμ) affect the modification of θ23. Though all the NSI parameters influence the evolution of θ13, εeμ and εeτ show a stronger impact at the energies relevant for DUNE. The solar mixing angle θ12 quickly approaches to ∼ 90° with increasing energy in both SI and SI+NSI cases. The change in ∆m21,m2 is quite significant as compared to ∆m31,m2 both in SI and SI+NSI frameworks for the energies relevant for DUNE baseline. Flipping the signs of the NSI parameters alters the way in which mass-mixing parameters run with energy. We demonstrate the utility of our approach in addressing several important features related to neutrino oscillation such as: a) unraveling interesting degeneracies between θ23 and NSI parameters, b) estimating the resonance energy in presence of NSI when θ13 in matter becomes maximal, c) figuring out the required baselines and energies to have maximal matter effect in νμ → νe transition in the presence of different NSI parameters, and d) studying the impact of NSI parameters εμτ and (γ − β) on the νμ → νμ survival probability.11Nsciescopu
Characterization of tea (Camellia sinensis) granules for quality grading using computer vision system
No full textTea (Camellia sinensis) has been found as an important medicinal beverage for human which is consumed all over the world. Primarily, the majority of tea is being cultivated in Asia and Africa, however it is commercially produced by more than 60 countries. Though substantial amount is produced, its processing system is still underdeveloped which leads to decrease in export opportunity as well as low monetary value. Moreover, the traditional method of tea grading and sorting is laborious, inefficient, and costly which ultimately produces the low-quality heterogeneous products. Processing and grading of tea granules after drying is very important task for maintaining quality. Computer vision (CV) applications in processing unit especially in grading and sorting of agro-products is very popular and reliable option to improve quality of produce. In this study, an attempt was taken to develop a machine vision system for quality grading of tea granules based on physical parameters of four standard tea grades namely BOP, GBOP, CD and PF. An image acquisition system with suitable illumination arrangement was developed to obtain high resolution image of tea granules. The images were analyzed to extract physical features like projected area, circularity, roundness, ferret diameter, aspect ratio and solidity. Tea granules (BOP, CD, PF and GBOP grade) were found significantly different for the textural features area, perimeter, circularity, roundness and ferret diameter. Projected area, perimeter, and feret diameter treated as a good indicator of the extracted features as the system has been able to significantly (p < 0.01) differentiate among the grade of tea. The developed characterization attributes based on physical features prior to an automatic sorting technology will improve the efficiency and enhance the cost-effectiveness which ultimately led to energize the international export market.Rahman, Towfiq; Ferdous, Sabiha; Jenin, Mariya; Mim, Tanjina; Alam, Masud; Mamun, Muhammad. (2021). Characterization of tea (Camellia sinensis) granules for quality grading using computer vision system. Retrieved from the University Digital Conservancy, https://doi.org/10.1016/j.jafr.2021.100210
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