| 1. |
- Niemi, MEK, et al.
(författare)
-
- 2021
-
swepub:Mat__t
|
|
| 2. |
- Kanai, M, et al.
(författare)
-
- 2023
-
swepub:Mat__t
|
|
| 3. |
- Lind, Lars, et al.
(författare)
-
Heterogeneous contributions of change in population distribution of body mass index to change in obesity and underweight NCD Risk Factor Collaboration (NCD-RisC)
- 2021
-
Ingår i: eLife. - : eLife Sciences Publications Ltd. - 2050-084X. ; 10
-
Tidskriftsartikel (refereegranskat)abstract
- From 1985 to 2016, the prevalence of underweight decreased, and that of obesity and severe obesity increased, in most regions, with significant variation in the magnitude of these changes across regions. We investigated how much change in mean body mass index (BMI) explains changes in the prevalence of underweight, obesity, and severe obesity in different regions using data from 2896 population-based studies with 187 million participants. Changes in the prevalence of underweight and total obesity, and to a lesser extent severe obesity, are largely driven by shifts in the distribution of BMI, with smaller contributions from changes in the shape of the distribution. In East and Southeast Asia and sub-Saharan Africa, the underweight tail of the BMI distribution was left behind as the distribution shifted. There is a need for policies that address all forms of malnutrition by making healthy foods accessible and affordable, while restricting unhealthy foods through fiscal and regulatory restrictions.
|
|
| 4. |
- Mishra, A, et al.
(författare)
-
Diminishing benefits of urban living for children and adolescents' growth and development
- 2023
-
Ingår i: Nature. - : Springer Science and Business Media LLC. - 1476-4687 .- 0028-0836. ; 615:7954, s. 874-883
-
Tidskriftsartikel (refereegranskat)abstract
- Optimal growth and development in childhood and adolescence is crucial for lifelong health and well-being1–6. Here we used data from 2,325 population-based studies, with measurements of height and weight from 71 million participants, to report the height and body-mass index (BMI) of children and adolescents aged 5–19 years on the basis of rural and urban place of residence in 200 countries and territories from 1990 to 2020. In 1990, children and adolescents residing in cities were taller than their rural counterparts in all but a few high-income countries. By 2020, the urban height advantage became smaller in most countries, and in many high-income western countries it reversed into a small urban-based disadvantage. The exception was for boys in most countries in sub-Saharan Africa and in some countries in Oceania, south Asia and the region of central Asia, Middle East and north Africa. In these countries, successive cohorts of boys from rural places either did not gain height or possibly became shorter, and hence fell further behind their urban peers. The difference between the age-standardized mean BMI of children in urban and rural areas was <1.1 kg m–2 in the vast majority of countries. Within this small range, BMI increased slightly more in cities than in rural areas, except in south Asia, sub-Saharan Africa and some countries in central and eastern Europe. Our results show that in much of the world, the growth and developmental advantages of living in cities have diminished in the twenty-first century, whereas in much of sub-Saharan Africa they have amplified.
|
|
| 5. |
|
|
| 6. |
|
|
| 7. |
|
|
| 8. |
|
|
| 9. |
- Tamhankar, AJ, et al.
(författare)
-
Characteristics of a Nationwide Voluntary Antibiotic Resistance Awareness Campaign in India; Future Paths and Pointers for Resource Limited Settings/Low and Middle Income Countries
- 2019
-
Ingår i: International journal of environmental research and public health. - : MDPI AG. - 1660-4601. ; 16:24
-
Tidskriftsartikel (refereegranskat)abstract
- Antibiotic resistance has reached alarming proportions globally, prompting the World Health Organization to advise nations to take up antibiotic awareness campaigns. Several campaigns have been taken up worldwide, mostly by governments. The government of India asked manufacturers to append a ‘redline’ to packages of antibiotics as identification marks and conducted a campaign to inform the general public about it and appropriate antibiotic use. We investigated whether an antibiotic resistance awareness campaign could be organized voluntarily in India and determined the characteristics of the voluntarily organized campaign by administering a questionnaire to the coordinators, who participated in organizing the voluntary campaign India. The campaign characteristics were: multiple electro–physical pedagogical and participatory techniques were used, 49 physical events were organized in various parts of India that included lectures, posters, booklet/pamphlet distribution, audio and video messages, competitions, and mass contact rallies along with broadcast of messages in 11 local languages using community radio stations (CRS) spread all over India. The median values for campaign events were: expenditure—3000 Indian Rupees/day (US$~47), time for planning—1 day, program spread—4 days, program time—4 h, direct and indirect reach of the message—respectively 250 and 500 persons/event. A 2 min play entitled ‘Take antibiotics as prescribed by the doctor’ was broadcast 10 times/day for 5 days on CRS with listener reach of ~5 million persons. More than 85%ofcoordinators thought that the campaign created adequate awareness about appropriate antibiotic use and antibiotic resistance. The voluntary campaign has implications for resource limited settings/low and middle income countries.
|
|
| 10. |
- Anderson, J. K., et al.
(författare)
-
Grouping of PFAS for human health risk assessment : Findings from an independent panel of experts
- 2022
-
Ingår i: Regulatory toxicology and pharmacology. - : Elsevier. - 0273-2300 .- 1096-0295. ; 134
-
Tidskriftsartikel (refereegranskat)abstract
- An expert panel was convened to provide insight and guidance on per- and polyfluoroalkyl substances (PFAS) grouping for the purposes of protecting human health from drinking water exposures, and how risks to PFAS mixtures should be assessed. These questions were addressed through multiple rounds of blind, independent responses to charge questions, and review and comments on co-panelists responses. The experts agreed that the lack of consistent interpretations of human health risk for well-studied PFAS and the lack of information for the vast majority of PFAS present significant challenges for any mixtures risk assessment approach. Most experts agreed that "all PFAS" should not be grouped together, persistence alone is not sufficient for grouping PFAS for the purposes of assessing human health risk, and that the definition of appropriate subgroups can only be defined on a case-by-case manner. Most panelists agreed that it is inappropriate to assume equal toxicity/potency across the diverse class of PFAS. A tiered approach combining multiple lines of evidence was presented as a possible viable means for addressing PFAS that lack analytical and/or toxicological studies. Most PFAS risk assessments will need to employ assumptions that are more likely to overestimate risk than to underestimate risk, given the choice of assumptions regarding dose-response model, uncertainty factors, and exposure information.
|
|
| 11. |
- Kannan, P., et al.
(författare)
-
Functional parameters derived from magnetic resonance imaging reflect vascular morphology in preclinical tumors and in human liver metastases
- 2018
-
Ingår i: Clinical Cancer Research. - : American Association for Cancer Research Inc.. - 1078-0432 .- 1557-3265. ; 24:19, s. 4694-4704
-
Tidskriftsartikel (refereegranskat)abstract
- Purpose: Tumor vessels influence the growth and response of tumors to therapy. Imaging vascular changes in vivo using dynamic contrast-enhanced MRI (DCE-MRI) has shown potential to guide clinical decision making for treatment. However, quantitative MR imaging biomarkers of vascular function have not been widely adopted, partly because their relationship to structural changes in vessels remains unclear. We aimed to elucidate the relationships between vessel function and morphology in vivo. Experimental Design: Untreated preclinical tumors with different levels of vascularization were imaged sequentially using DCE-MRI and CT. Relationships between functional parameters from MR (iAUC, Ktrans, and BATfrac) and structural parameters from CT (vessel volume, radius, and tortuosity) were assessed using linear models. Tumors treated with anti-VEGFR2 antibody were then imaged to determine whether antiangiogenic therapy altered these relationships. Finally, functional-structural relationships were measured in 10 patients with liver metastases from colorectal cancer. Results: Functional parameters iAUC and Ktrans primarily reflected vessel volume in untreated preclinical tumors. The relationships varied spatially and with tumor vascularity, and were altered by antiangiogenic treatment. In human liver metastases, all three structural parameters were linearly correlated with iAUC and Ktrans. For iAUC, structural parameters also modified each other's effect. Conclusions: Our findings suggest that MR imaging biomarkers of vascular function are linked to structural changes in tumor vessels and that antiangiogenic therapy can affect this link. Our work also demonstrates the feasibility of three-dimensional functional-structural validation of MR biomarkers in vivo to improve their biological interpretation and clinical utility.
|
|
| 12. |
- Normark, B., et al.
(författare)
-
Storage Solutions and Their Value
- 2017
-
Ingår i: Europe's Energy Transition. - : Elsevier. - 9780128098066 - 9780128099032 ; , s. 173-187
-
Bokkapitel (refereegranskat)abstract
- Energy storage has increasingly come into focus as a key transformational technology in the energy system. This is driven by several factors, including: (1) the increased electrification of the energy system and the associated changes in demand patterns, driven by new loads such as electric vehicles and heat pumps; (2) the decarbonization of the power system and the associated increases in the penetration of variable renewable electricity production, and related security of supply concerns. In this chapter we explore the evolving role of storage in the EU energy system-both at present and in the future. This includes proposed changes in current legislative frameworks to support the diffusion of storage technologies-a key enabler in the EU's transition to a reliable, flexible, and affordable energy system.
|
|
| 13. |
- Shivakumar, Abhishek, et al.
(författare)
-
Need for Flexibility and Potential Solutions
- 2017
-
Ingår i: Europe's Energy Transition. - : Elsevier. - 9780128098066 - 9780128099032 ; , s. 149-172
-
Bokkapitel (refereegranskat)abstract
- With an increasing penetration of variable renewables in the EU in recent years, the flexibility of its power system is of critical importance. In this chapter, we first assess flexibility considerations in the past, prior to market liberalization. We then analyze the impact of increasing penetration of renewables on flexibility requirements. Further, we identify existing options to provide this flexibility. Finally, we use model-based analysis, we quantitatively assess potential solutions to deploying temporary production and storage. Business models and potential evolutions of the legislative framework associated with the different solutions are also proposed.
|
|
| 14. |
- Balaji, G., et al.
(författare)
-
Investigations on Hot-wall deposited Cadmium Sulphide buffer layer for thin film solar cell
- 2018
-
Ingår i: Materials Letters. - : Elsevier BV. - 1873-4979 .- 0167-577X. ; 222, s. 82-87
-
Tidskriftsartikel (refereegranskat)abstract
- Cadmium Sulphide (CdS) thin films were deposited on to well-cleaned soda lime glass substrates using hot wall deposition technique at room temperature. The structure of CdS thin films was found to be hexagonal with < 0 0 2 > orientation and after annealing the film crystallized to < 0 0 2 >, < 1 0 1 >, < 1 0 2 >, < 1 1 2 > directions. Raman Spectroscopy confirmed the hexagonal structure with a shift at 312 cm(1). SAED pattern from the Transmission electron microscopy also confirmed the formation of hexagonal CdS. X-ray Photoelectron Spectroscopy confirmed the formation of CdS with relevant at% of Cd and S. Field emission scanning electron microscopy images revealed smooth surface of the thin film with distinctive grains. Atomic force microscopy results showed a surface roughness of 4.47 nm. Transmission spectra of the films were studied and the transparency was found to be above 80%. The optical band gap was found to be around 2.4 eV in accordance with the reported values. The results show that device quality buffer layers can be deposited using Hot-wall deposition. (C) 2018 Elsevier B.V. All rights reserved.
|
|
| 15. |
- Selvavinayagam, Sivaprakasam T., et al.
(författare)
-
Clinical characteristics and novel mutations of omicron subvariant XBB in Tamil Nadu, India - a cohort study
- 2023
-
Ingår i: The Lancet Regional Health - Southeast Asia. - : ELSEVIER. - 2772-3682. ; 19
-
Tidskriftsartikel (refereegranskat)abstract
- Background Despite the continued vaccination efforts, there had been a surge in breakthrough infections, and the emergence of the B.1.1.529 omicron variant of SARS-CoV-2 in India. There is a paucity of information globally on the role of newer XBB variants in community transmission. Here, we investigated the mutational patterns among hospitalised patients infected with the XBB omicron sub-variant, and checked if there was any association between the rise in the number of COVID-19 cases and the observed novel mutations in Tamil Nadu, India. Methods Nasopharyngeal and oropharyngeal swabs, collected from symptomatic and asymptomatic COVID-19 patients were subjected to real-time PCR followed by Next Generation Sequencing (NGS) to rule out the ambiguity of mutations in viruses isolated from the patients (n = 98). Using the phylogenetic association, the mutational patterns were used to corroborate clinico-demographic characteristics and disease severity among the patients. Findings Overall, we identified 43 mutations in the S gene across 98 sequences, of which two were novel mutations (A27S and T747I) that have not been reported previously with XBB sub-variants in the available literature. Additionally, the XBB sequences from our cohort had more mutations than omicron B.1.1.529. The phylogenetic analysis comprising six major branches clearly showed convergent evolution of XBB. Our data suggests that age, and underlying conditions (e.g., diabetes, hypertension, and cardiovascular disease) or secondary complications confers increased susceptibility to infection rather than vaccination status or prior exposure. Many vaccinated individuals showed evidence of a breakthrough infection, with XBB.3 being the predominant variant identified in the study population. Interpretation Our study indicates that the XBB variant is highly evasive from available vaccines and may be more transmissible, and potentially could emerge as the 'next' predominant variant, which likely could overwhelm the existing variants of SARS-CoV-2 omicron variants.Funding National Health Mission (India), SIDA SARC, VINNMER (Sweden), ORIP/NIH (USA).Copyright (c) 2023 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
|
|
| 16. |
- Selvavinayagam, Sivaprakasam T., et al.
(författare)
-
Genomic surveillance of omicron B.1.1.529 SARS‐CoV‐2 and its variants between December 2021 and March 2023 in Tamil Nadu, India—A state‐wide prospective longitudinal study
- 2024
-
Ingår i: Journal of Medical Virology. - : John Wiley & Sons. - 0146-6615 .- 1096-9071. ; 96:2
-
Tidskriftsartikel (refereegranskat)abstract
- A state-wide prospective longitudinal investigation of the genomic surveillance of the omicron B.1.1.529 SARS-CoV-2 variant and its sublineages in Tamil Nadu, India, was conducted between December 2021 and March 2023. The study aimed to elucidate their mutational patterns and their genetic interrelationship in the Indian population. The study identified several unique mutations at different time-points, which likely could attribute to the changing disease characteristics, transmission, and pathogenicity attributes of omicron variants. The study found that the omicron variant is highly competent in its mutating potentials, and that it continues to evolve in the general population, likely escaping from natural as well as vaccine-induced immune responses. Our findings suggest that continuous surveillance of viral variants at the global scenario is warranted to undertake intervention measures against potentially precarious SARS-CoV-2 variants and their evolution.
|
|
| 17. |
- Vijayakumar, P., et al.
(författare)
-
Hierarchical key management scheme for securing mobile agents with optimal computation time
- 2012
-
Ingår i: International Conference on Modelling Optimization and Computing. - : Elsevier. ; , s. 1432-1443
-
Konferensbidrag (refereegranskat)abstract
- The Mobile agents are well suited for accessing contents of distributed web based applications including internet business. Such kinds of access must be secure enough enabling only authorized mobile agents to retrieve the contents from the distributed servers. This kind of security is provided by several algorithms including RSA based digital signature and elliptic curve digital signature cryptography. The main differences among the algorithms of the past literatures lie in the computational time of encryption and decryption of the keys used for encrypting and decrypting the content. In this paper we propose a modified hierarchical date constrained key management scheme which potentially reduces the overall computation time needed for key derivation and key signature check operations. Different algorithms are compared with our proposed mechanism and the experimental results show that the proposed method reduces the overall key derivation and key signature check computational time.
|
|
| 18. |
- Yeung, Andy Wai Kan, et al.
(författare)
-
Dietary natural products and their potential to influence health and disease including animal model studies
- 2018
-
Ingår i: Animal Science Papers and Reports. - : POLSKA AKAD NAUK, INST GENETYKI I HODOWLI ZWIERZAT. - 0860-4037. ; 36:4, s. 345-358
-
Forskningsöversikt (refereegranskat)abstract
- Although biological and pharmacological effects of dietary natural products have been intensively studied, there has been no bibliometric analysis performed on this research field up to now. The current study has aimed to identify and analyze the manuscripts on dietary natural products and their potential to influence health and disease including studies using animal models. Data, including words from titles and abstracts, publication and citation data, have been extracted from Web of Science database and analyzed by the VOSviewer software. Our search has yielded 1,014 manuscripts. The ratio of original articles to reviews was identified to be 1.5:1. Over half of the manuscripts have been published since 2010. The manuscripts have been contributed by 4,301 authors from 1,445 organizations in 76 countries/territories and published in 499 journals. The results from the current study point out that scientific research focusing on the potential of dietary natural products to affect health and disease status (including animal model studies) is expanding, and suggests an increasing significance of this scientific area. With the progressive development and improvement of animal studies, it should be expected that animal models of different human diseases (especially civilization ones) would be an integral part of the research for the evaluation of pharmaceuticals originated from dietary natural products like plants or plant materials. Moreover, natural products can also be fed to animals to improve the quality of animal products, with numerous resulting functional effects.
|
|
| 19. |
- Athanasaki, G., et al.
(författare)
-
Design and development of gas diffusion layers with pore forming agent for proton exchange membrane fuel cells at various relative humidity conditions
- 2021
-
Ingår i: International journal of hydrogen energy. - : Elsevier BV. - 0360-3199 .- 1879-3487. ; 46:9, s. 6835-6844
-
Tidskriftsartikel (refereegranskat)abstract
- Membrane electrode assemblies are developed by incorporating gas diffusion layers (GDL) to improve the lower and higher relative humidity performance of proton exchange membrane fuel cells (PEMFCs). In the present study, gas diffusion layer samples containing microporous layers, are fabricated using carbon paper substrate, PUREBLACK® carbon powder and polyethylene glycol as pore forming agent. The GDLs are studied in single cell fuel cell, to evaluate the effect of porosity of the micro-porous layer on the performance at different operating relative humidity conditions and compared with commercial GDLs. Scanning electron microscopy and contact angle measurements indicate crack-free surface morphology and hydrophobic characteristics of the PUREBLACK® based GDLs, respectively. By varying the wt. % of PEG, fuel cell performance is evaluated under relative humidity conditions of 60 and 100% using H2/O2 and H2/Air at 70 °C and the durability is also evaluated for the GDL samples without and with 30% PEG. The fuel cell performance of the GDL with 30% pore forming agent (with a pore volume of 1.72 cc.g−1) exhibited higher performance (444 and 432 mW cm−2 at 60 and 100% RH conditions, respectively using H2 and air) compared to that without pore forming agent (436 and 397 mW cm−2).
|
|
| 20. |
- Gilbert, Mary E., et al.
(författare)
-
An animal model of marginal iodine deficiency during development : the thyroid axis and neurodevelopmental outcome
- 2013
-
Ingår i: Toxicological Sciences. - : Oxford University Press. - 1096-6080 .- 1096-0929. ; 132:1, s. 177-195
-
Tidskriftsartikel (refereegranskat)abstract
- Thyroid hormones (THs) are essential for brain development, and iodine is required for TH synthesis. Environmental chemicals that perturb the thyroid axis result in modest reductions in TH, yet there is a paucity of data on the extent of neurological impairments associated with low-level TH disruption. This study examined the dose-response characteristics of marginal iodine deficiency (ID) on parameters of thyroid function and neurodevelopment. Diets deficient in iodine were prepared by adding 975, 200, 125, 25, or 0 µg/kg potassium iodate to the base casein diet to produce five nominal iodine levels ranging from ample (Diet 1: 1000 μg iodine/kg chow, D1) to deficient (Diet 5: 25 µg iodine/kg chow, D5). Female Long Evans rats were maintained on these diets beginning 7 weeks prior to breeding until the end of lactation. Dams were sacrificed on gestational days 16 and 20, or when pups were weaned on postnatal day (PN) 21. Fetal tissue was harvested from the dams, and pups were sacrificed on PN14 and PN21. Blood, thyroid gland, and brain were collected for analysis of iodine, TH, and TH precursors and metabolites. Serum and thyroid gland iodine and TH were reduced in animals receiving two diets that were most deficient in iodine. T4 was reduced in the fetal brain but was not altered in the neonatal brain. Neurobehavior, assessed by acoustic startle, water maze learning, and fear conditioning, was unchanged in adult offspring, but excitatory synaptic transmission was impaired in the dentate gyrus in animals receiving two diets that were most deficient in iodine. A 15% reduction in cortical T4 in the fetal brain was sufficient to induce permanent reductions in synaptic function in adults. These findings have implications for regulation of TH-disrupting chemicals and suggest that standard behavioral assays do not readily detect neurotoxicity induced by modest developmental TH disruption.
|
|
| 21. |
- Jain, Rahul, et al.
(författare)
-
Implementation of a Property Database and Thermodynamic Calculations in OpenModelica for Chemical Process Simulation
- 2019
-
Ingår i: Industrial & Engineering Chemistry Research. - : American Chemical Society (ACS). - 0888-5885 .- 1520-5045. ; 58:81, s. 7551-7560
-
Tidskriftsartikel (refereegranskat)abstract
- An attempt has been made to enhance the thermodynamic capabilityof the general purpose modelling and simulation environment OpenModelica. The propertydatabase ChemSep and the thermodynamic algorithms of DWSIM are made available inOpenModelica. Following three approaches, listed in the order of increasing computationaleciency, are attempted in this work: Python-C API, socket programming and a nativeport. The most ecient method of native port is adopted to make available NRTL, Peng-Robinson, UNIFAC and UNIQUAC algorithms in OpenModelica. Through several examples,OpenModelica results are compared with Aspen Plus, indicating a good match in all cases.This work is released as open source to enhance the collaboration amongst chemical engineers.
|
|
| 22. |
|
|
| 23. |
|
|
| 24. |
- Kannan, SR, et al.
(författare)
-
Complex Mutation Pattern of Omicron BA.2: Evading Antibodies without Losing Receptor Interactions
- 2022
-
Ingår i: International journal of molecular sciences. - : MDPI AG. - 1422-0067. ; 23:10
-
Tidskriftsartikel (refereegranskat)abstract
- BA.2, a sublineage of Omicron BA.1, is now prominent in many parts of the world. Early reports have indicated that BA.2 is more infectious than BA.1. To gain insight into BA.2 mutation profile and the resulting impact of mutations on interactions with receptor and/or monoclonal antibodies, we analyzed available sequences, structures of Spike/receptor and Spike/antibody complexes, and conducted molecular dynamics simulations. The results showed that BA.2 had 50 high-prevalent mutations, compared to 48 in BA.1. Additionally, 17 BA.1 mutations were not present in BA.2. Instead, BA.2 had 19 unique mutations and a signature Delta variant mutation (G142D). The BA.2 had 28 signature mutations in Spike, compared to 30 in BA.1. This was due to two revertant mutations, S446G and S496G, in the receptor-binding domain (RBD), making BA.2 somewhat similar to Wuhan-Hu-1 (WT), which had G446 and G496. The molecular dynamics simulations showed that the RBD consisting of G446/G496 was more stable than S446/S496 containing RBD. Thus, our analyses suggested that BA.2 evolved with novel mutations (i) to maintain receptor binding similar to WT, (ii) evade the antibody binding greater than BA.1, and (iii) acquire mutation of the Delta variant that may be associated with the high infectivity.
|
|
| 25. |
- Karthick Raaj, R., et al.
(författare)
-
Exploring grinding and burnishing as surface post-treatment options for electron beam additive manufactured Alloy 718
- 2020
-
Ingår i: Surface & Coatings Technology. - : Elsevier BV. - 0257-8972 .- 1879-3347. ; 397
-
Tidskriftsartikel (refereegranskat)abstract
- Numerous additive manufacturing (AM) techniques have been developed over the past decade. Features like immense freedom of intricate part design and shorter lead time make AM routes promising for a wide range of applications spanning aerospace, marine and automobile sectors. Among the various metal AM processes, Electron Beam Additive Manufacturing (EBAM) is being widely explored to realise the potential of Ni-based superalloys and Ti alloys for varied high-performance applications. A novel attempt has been made in this paper to assess the surface integrity of as-built EBAM nickel-based superalloy 718 (AB) subjected to grinding (G), Low Plasticity Burnishing (LPB) and their sequential combination. Apart from their influence on sub-surface microstructures, the effect of process variables during the above post-treatments on the residual stress profiles was also investigated. Results revealed that G + LPB results in about 0.6 ÎŒm lower surface roughness, 17% improved microhardness compared to AB + LPB, and higher compressive surface residual stress as compared to LPB processed EBAM samples. The sequential grinding and LPB - improved microhardness, was also found to extend about 500 ÎŒm more when compared to the LPB process. The G + LPB, which is greatly influenced by the prior grinding, smoothens the surface and thus results in a better surface finish. Highest hardness, superior surface finish, reduced porosity and improved compressive residual stress were observed in samples that adopted the AB + G + LPB sequence over other samples, with the LPB step at 40 MPa yielding the best results. © 2020 Elsevier B.V.
|
|
| 26. |
|
|
| 27. |
- Nayak, Priyam, et al.
(författare)
-
Chemical Process Simulation Using OpenModelica
- 2019
-
Ingår i: Industrial & Engineering Chemistry Research. - : AMER CHEMICAL SOC. - 0888-5885 .- 1520-5045. ; 58:26, s. 11164-11174
-
Tidskriftsartikel (refereegranskat)abstract
- The equation-oriented general-purpose simulator OpenModelica provides a convenient, extendible modeling environment, with capabilities such as an easy switch from steady-state to dynamic simulations. This work reports the creation of a library of steady-state models of unit operations using OpenModelica. The use of this library is demonstrated through a few representative flow-sheets, and the results are compared with the steady-state simulators Aspen Plus and DWSIM. Being open-source and supported by a large community of developers across the world, OpenModelica provides a convenient platform to train a large number of chemical engineers to increase collaborative research and employment.
|
|
| 28. |
- Uma, K., et al.
(författare)
-
Scanned compound images using different compression techniques
- 2017
-
Ingår i: Journal of Advanced Research in Dynamical and Control Systems. - : Institute of Advanced Scientific Research, Inc.. - 1943-023X. ; 9:Special Issue 2, s. 994-1000
-
Tidskriftsartikel (refereegranskat)abstract
- This Paper involves a detailed study of different compression techniques of scanned compound images. A compound image is a different kind of image that contains text, natural image and graphic image. Some of the Image compression techniques which include DCT,JPEG, H.264,MMP AND APM-MMP have been reviewed and presented in this paper. Discrete cosine transform (DCT) is a method which compresses the compound image without any loss of data. To compress image DCT is computed using two dimensional functions (2D).Join Picture Expert Group(JPEG) is mostly used as standard format for compressed images. Due to loss of data the compressed image differs from the original image.H.264 is a video compression standard which is also capable of compressing a compound image.MMP is specifically calculated to encode separately the macro blocks information of text and image. Since complexity is high in these above techniques the proposed technique Adaptive Probability Model-MMP solves the limitations like redundant data removal and enhances the image quality. It also improves the encoding efficiency thus modifying the MMP’s character.
|
|
| 29. |
- van Nuijs, Alexander L. N., et al.
(författare)
-
Multi-year inter-laboratory exercises for the analysis of illicit drugs and metabolites in wastewater : development of a quality control system
- 2018
-
Ingår i: TrAC. Trends in analytical chemistry. - : Elsevier. - 0165-9936 .- 1879-3142. ; 103, s. 34-43
-
Forskningsöversikt (refereegranskat)abstract
- Thirty-seven laboratories from 25 countries present the development of an inter-laboratory testing scheme for the analysis of seven illicit drug residues in standard solutions, tap- and wastewater. Almost 10 000 concentration values were evaluated: triplicates of up to five samples and 26 laboratories per year. The setup was substantially improved with experiences gained across the six repetitions (e.g. matrix type, sample conditions, spiking levels). From this, (pre-)analytical issues (e.g. pH adjustment, filtration) were revealed for specific analytes which resulted in formulation of best-practice protocols for inter-laboratory setup and analytical procedures. The results illustrate the effectiveness of the interlaboratory setup to assess laboratory performance in the framework of wastewater-based epidemiology. The exercise proved that measurements of laboratories were of high quality (>80% satisfactory results for six out of seven analytes) and that analytical follow-up is important to assist laboratories in improving robustness of wastewater-based epidemiology results.
|
|
| 30. |
- Vignarooban, K., et al.
(författare)
-
Current trends and future challenges of electrolytes for sodium-ion batteries
- 2016
-
Ingår i: International Journal of Hydrogen Energy. - : Elsevier BV. - 0360-3199. ; 41:4, s. 2829-2846
-
Tidskriftsartikel (refereegranskat)abstract
- Research and development efforts on sodium-ion batteries are gaining momentum due to their potential to accommodate high energy density coupled with relatively lower cost in comparison with lithium-ion batteries. In order for the sodium-ion batteries to be commercially viable, high performance electrolytes with acceptable ambient temperature ionic conductivity and wider electrochemical stability windows are being developed. A bibliometric analysis of the publications on various types of Na+ ion conducting electrolytes since 1990 shows a total of 200 + publications and reveals an exponential growth in the last few years, due to reasons that the sodium-ion systems promise great potential as the future large scale power sources for variety of applications. This review consolidates the status of liquid (non-aqueous, aqueous and ionic), polymer gel and solid (ceramics, glasses, and solid polymers) electrolytes and discusses their ionic conductivity, thermal characteristics, electrochemical stability and viscosity towards applications in sodium-ion batteries. Among various types available, the non-aqueous solvent based electrolyte is the most promising one in terms of ionic conductivity even though it is flammable.
|
|
