123 research outputs found
BarnOwl: Secure Comparisons using Silent Pseudorandom Correlation Generators
No full textRecent advances in function secret sharing (FSS) have led to new possibilities in multi-party computation in the pre-processing model. Silent Pseudorandom Correlation Generators (Crypto \u2719, CCS \u2719, CCS \u2719, CCS \u2720) have demonstrated the ability to generate large quantities of pre-processing material such as oblivious transfers and Beaver triples through a non-interactive offline phase (with an initial set-up). However, there has been limited protocols for pre-processing material such as doubly authenticated bits (daBits, IndoCrypt\u2719) and extended doubly authenticated bits (edaBits, Crypto \u2720) which are critical for state-of-the-art secure comparison protocols over arithmetic secret sharing.
In this work, we propose new protocols in a 3-party computation model for these two cryptographic primitives -- daBits and edaBits. We explore how advances in silent PCGs can be used to construct efficient protocols for daBits and edaBits. Our protocols are secure against a single corruption in both the semi-honest and malicious security models. Our contributions can be summarized as follows:
(1) New constant round protocols for generating daBits and edaBits. We achieve this by constructing an efficient 3-party oblivious transfer protocol (using just 2 rounds of computation) and using it to build efficient protocols for daBit and edaBit generation.
(2) We extend the above semi-honest protocol to achieve malicious security against an honest majority. We use a standard cut-and-choose approach for this. This improves the round complexity of prior edaBit protocols from O(log2 l) to a constant, where l is the bit-length of the inputs.
(3) Finally, to understand when the above protocols provide concrete efficiency, we implement and benchmark the performance of our protocols against state-of-the-art implementation of these primitives in MP-SDPZ. Our protocols improve the throughput of daBit generation by up to 10x in the LAN setting and 5x in the WAN setting. Comparing the performance of edaBit generation, our protocols achieve 4x higher throughput in the LAN setting and 32x higher throughput in the WAN setting.
It is known that silent PCGs are compute intense and thus the performance of these new protocols can further be improved using works such as CryptGPU (S\&P \u2721), Piranha (USENIX \u2722) that significantly improve the local computation in MPC protocols
Development and validation of a simple analytical method for the determination of 2,4,6-trichloroanisole in wine by GC–MS
No full textA novel method for the residue analysis of wine spoilage compound 2,4,6-trichloroanisole is reported. Wine (60 ml) was extracted with 2 ml toluene in presence of 24 g MgSO4 and 6 g NaCl. Cleanup of the toluene phase by dispersive solid phase extraction with mixture of 100 mg CaCl2, 25 mg primary secondary amine and 50 mg MgSO4 was effective in minimising co-extractives and matrix effects. Time-of-flight and tandem mass spectrometric parameters were optimised to achieve linearity over 0.25–500 ng ml1 and method detection limit 0.0083 ng ml1 which is well below the odour threshold of 0.04 ng ml1 . Recoveries at 0.04, 0.2 and 0.8 ng ml1 were within 80–110% (±8%). The method was reproducible when tested for Argentinean wines with intra-laboratory Horwitz ratios being <0.20 in white and red wines at both the laboratories of India and Argentina. The method could be successfully applied for incurred wine samples.Fil: Patil, Sagram H.. National Research Centre For Grapes; India. Shivaji University; IndiaFil: Banerjee, Kaushik. National Research Centre For Grapes; IndiaFil: Utture, Sagar C.. National Research Centre For Grapes; IndiaFil: Fontana, Ariel Ramón. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Regional de Investigaciones Científicas y Tecnológicas. Laboratorio de Investigaciones y Servicios Ambientales Mendoza; ArgentinaFil: Altamirano, Jorgelina Cecilia. Universidad Nacional de Cuyo. Facultad de Ciencias Exactas y Naturales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Regional de Investigaciones Científicas y Tecnológicas. Laboratorio de Investigaciones y Servicios Ambientales Mendoza; ArgentinaFil: Oulkar, Dasharath P.. National Research Centre For Grapes; IndiaFil: Wagh, Sameer S.. National Research Centre For Grapes; IndiaFil: Dasgupta, Soma. National Research Centre For Grapes; IndiaFil: Patil, Shubhangi B.. National Research Centre For Grapes; IndiaFil: Jadhab, Manjusha R.. National Research Centre For Grapes; IndiaFil: Ugare, Bharat R.. National Research Centre For Grapes; IndiaFil: Adsule, Pandurang G.. National Research Centre For Grapes; IndiaFil: Deshmukh, Madhukar B.. Shivaji University; Indi
Macrothrix laticornis, s.lat.
No full text(63) Macrothrix laticornis (Jurine, 1820) s.lat. Indian records. Andhra Pradesh— Karuthapandi et al. (2012); Andaman & Nicobar Islands — Venkataraman (2000a); Assam —Sharma S. (2008a, b); Jammu & Kashmir— Brehm (1936), Raina & Vass (1993); Jharkhand — Chandrasekhar & Chatterjee (2008); Kerala —Michael & Sharma B.K. (1988); Maharashtra —Gaikwad et al. (2008), Koli & Muley (2012); Manipur —Sharma B.K. & Sharma S. (2009a); Meghalaya —Hatter et al. (2004), Sharma S (2010b); Rajasthan —Sharma V. et al. (2012); Tamil Nadu —Michael & Sharma B.K. (1988), Venkataraman (1999b), Raghunathan (1983), Raghunathan & Suresh Kumar (2002, 2009); West Bengal — Datta (2011); General record— Fernando & Kanduru (1984), Sharma & Michael (1987), Murugan et al. (1998), Raghunathan & Suresh Kumar (2003). Remarks. Described from Switzerland (Jurine 1820). The Indian record needs to be checked, probably, they belong to M. vietnamensis Silva-Briano, Dieu & Dumont, 1999. Raghunathan & Suresh Kumar (2003) listed Macrothrix laticornis (Fischer) in their checklist, but the author was represented in the wrong way. Distribution. M. laticornis s.str. is "reliably known from most of Europe, and extending east across most of temperate Asia, with outlying populations occurring as far as Central Nepal " (Silva-Briano et al. 1999). Macrothrix capensis monodi Gauthier, 1930 Indian records. Maharashtra — Rane (2005b); Goa— Rane (2008); Tripura —Venkataraman (1994); General record— Raghunathan & Suresh Kumar (2003). Remarks. Described from Algeria (Gauthier 1930). Junior synonym of M. odiosa (Kotov et al. 2005).Published as part of CHATTERJEE, TAPAS, KOTOV, ALEXEY A., DAMME, KAY VAN, CHANDRASEKHAR, S. V. A. & PADHYE, SAMEER, 2013, An annotated checklist of the Cladocera (Crustacea: Branchiopoda) from India, pp. 1-89 in Zootaxa 3667 (1) on page 32, DOI: 10.11646/zootaxa.3667.1.1, http://zenodo.org/record/526620
Grimaldina brazzai Richard 1892
No full text(60) Grimaldina brazzai Richard, 1892 Indian records. Assam —Sharma B.K. & Sharma S. (2008a, b); Madhya Pradesh — Rane (1984c); Rajasthan — Venkataraman (1990b); Tamil Nadu — Raghunathan & Suresh Kumar (2002, 2009); West Bengal — Venkataraman & Das (1993), Venkataraman (1998c), Venkataraman et al. (2000); General record— Fernando & Kanduru (1984); Raghunathan & Suresh Kumar (2003). Remarks. Valid taxon described from Gabon, West Africa (Richard 1892). It probably consists of a series of cryptic species (H. J. Dumont, pers. comm.). Venkataraman (1998) recorded this species from West Bengal and claim that it is the first report from India, later Venkataraman & Das (1993) again said they had found the first record, although Rane (1984c) already found this taxon before. Distribution. At the time, regarded as circumtropical (Smirnov 1992; Kotov & Ferrari 2010). Guernella ceylonica Daday, 1898 Indian records. General record— Brehm (1953), Raghunathan & Suresh Kumar (2003). Remarks. Described from Sri Lanka (Daday 1898). Junior synonym of G. raphaelis Richard, 1892 (Smirnov 1976, 1992), also listed as such in Michael & Sharma B.K. (1988). However, G. raphaelis is described from West Africa, and ceylonica is an available name for Oriental populations if these would indeed prove to belong to a separate species. Guernella odiosa (Gurney, 1916) Indian records. General record— Raghunathan & Suresh Kumar (2003). Remarks. Raghunathan and Kumar (2003) listed this combination as apparent mistake. In reality, this combination was never proposed by any other author in cladoceran taxonomy. Sometimes Macrothrix odiosa was placed to the genus Gurneyella Brehm, 1930 (see Biswas 1971), not Guernella Richard, 1892. If Guernella is a valid taxon, which is indeed very different from Macrothrix (Smirnov 1976, 1992), Gurneyella is an apparent junior synonym of Macrothrix (Kotov et al. 2005). See Macrothrix odiosa for further comments.Published as part of CHATTERJEE, TAPAS, KOTOV, ALEXEY A., DAMME, KAY VAN, CHANDRASEKHAR, S. V. A. & PADHYE, SAMEER, 2013, An annotated checklist of the Cladocera (Crustacea: Branchiopoda) from India, pp. 1-89 in Zootaxa 3667 (1) on pages 30-31, DOI: 10.11646/zootaxa.3667.1.1, http://zenodo.org/record/526620
Developing a Framework for the Deployment of Crowd-Shipping: A Study in the Netherlands
No full textThe growth in the e-commerce platforms and online shopping has been increasing exponentially in the last decade. Businesses and logistics companies are finding new ways to ensure fast, sustainable, and safe deliveries to customers through existing means. However, to meet the ever increasing demand of deliveries, innovative shipping or delivery alternatives have been on the rise across the world. Crowd-Shipping is one such concept which aims at taking advantage of regular travellers with unused space and additional time who can pick up packages, in order to deliver packages to customers who lie along or near the same route for a small compensation. Since the Netherlands has witnesses massive e-commerce growth and demand for efficient and fast deliveries, this study aimed at how Crowd-Shipping can potentially be implemented in the Netherlands through considering a set of drivers, barriers and a business model innovation perspective. The study first investigates the existing research on the concept, focusing on the drivers, barriers and business model aspects. In order to explore these findings and potentially more or findings, we conducted the methodology which consisted of interviews and surveys. Post the interviews and surveys, a thorough analysis of the findings was conducted through content analysis, descriptive statistics and correlations. The results from the research indicate the importance of the findings from the literature with respect to existing drivers, barriers and business model perspectives while also providing insight into more drivers, barriers and business model perspectives that need to be considered for Crowd-Shipping deployment. These results are discussed in detail providing in-depth insight on the Crowd-Shipping aspects mentioned. We conclude the research by suggesting how Crowd-Shipping can be implemented in the Netherlands considering these drivers, barriers and business model aspects, following which, further research recommendations are provided.Management of Technology (MoT
Thermodynamic Modelling of Thermal Energy Storage Systems
No full textAbstractThis paper presents a novel methodology for comparing thermal energy storage to electrochemical, chemical, and mechanical energy storage technologies. The underlying physics of this model is hinged on the development of a round trip efficiency formulation for these systems. The charging and discharging processes of compressed air energy storage, flywheel energy storage, fuel cells, and batteries are well understood and defined from a physics standpoint in the context of comparing these systems. However, the challenge lays in comparing the charging process of these systems with the charging process of thermal energy storage systems for concentrating solar power plants (CSP). The round trip efficiency and the levelized cost of energy (LCOE) are the metrics used for comparison purposes. The thermal energy storage system is specifically compared to vanadium redox, sodium sulphur, and compressed air energy storage (CAES) systems from a large scale storage perspective of 100's of MWh. The rationale behind this analysis was to develop an electrical storage efficiency for molten salt thermal energy storage systems, such that it can be compared to battery energy storage technologies in the context of comparing CSP with thermal energy storage to solar photovoltaic with battery storage from a utility scale perspective. The results from the modelling using Andasol 3 CSP plant as a case study yield a storage efficiency of 86% and LCOE of $216/MWh. The results of this modelling will facilitate the future generation of a thermal energy storage roadmap
Guidance to Authors Submitting to the Social Marketing Quarterly (Editorial)
No full textEvery month, we at the Social Marketing Quarterly receive submissions from researchers and practitioners who submit work that does not address or is not relevant to the core issues of social marketing; this results in desk rejections or negative peer reviews. We ask potential authors to refer to the following questions and answers, which explain what we look for in manuscripts, and what you as an author can do to ensure that your submission has the highest chance of publication.No Full Tex
Reporting ethical processes in two Indian journals
No full textBackground: In biomedical journals, authors are expected to report if
the study was carried out in accordance with international and national
ethical guidelines and inform readers if approval from ethics committee
was obtained and if written informed consent was taken from the
participant or legal guardian. Aims: To determine the proportion of
research manuscripts in two pediatric journals published from India
reporting on ethical clearance, obtaining of informed consent and/or
assent. Settings and Design: Retrospective study for analysis of
research articles published. Materials and Methods : Research articles
published in the issues of Indian Pediatrics and Indian Journal of
Pediatrics in 2006 were reviewed for reporting regarding ethical
clearance, obtaining written informed consent from guardians or
parents, and obtaining assent from research participants. Statistical
Analysis Used: Descriptive statistics was used. The number of articles
according to their types; the number of research designs employed
according to their types; and the number of research studies mentioning
ethical clearance, consent, and assent were expressed as percentages
mentioning ethical clearance, consent and assent were expressed as
percentages. Results: Of the 132 manuscripts reporting biomedical
research, 39 (29.53%) reported having obtained approval from the ethics
committee. Forty-six of the 98 (46.94%) manuscripts reporting on
prospective studies indicated that informed consent was obtained from
parents or lawful guardians. Neither ethical approval nor informed
consent was mentioned in 45 (34.10%) published articles reporting
prospective studies. A total of 54/98 (55.1%) studies enrolled children
aged 7 years or more and hence were assessed for reporting of assent;
eight (14.81%) reported that children′s assent was obtained. Only
four (7.41%) eligible studies reported ethics committee′s
approval, informed consent, as well as assent. Conclusions: A
significant proportion of research articles published in the two
pediatric journals did not provide information regarding ethical
approval, written informed consent, and obtaining of assent
Reporting ethical processes in two Indian journals
No full textBackground: In biomedical journals, authors are expected to report if
the study was carried out in accordance with international and national
ethical guidelines and inform readers if approval from ethics committee
was obtained and if written informed consent was taken from the
participant or legal guardian. Aims: To determine the proportion of
research manuscripts in two pediatric journals published from India
reporting on ethical clearance, obtaining of informed consent and/or
assent. Settings and Design: Retrospective study for analysis of
research articles published. Materials and Methods : Research articles
published in the issues of Indian Pediatrics and Indian Journal of
Pediatrics in 2006 were reviewed for reporting regarding ethical
clearance, obtaining written informed consent from guardians or
parents, and obtaining assent from research participants. Statistical
Analysis Used: Descriptive statistics was used. The number of articles
according to their types; the number of research designs employed
according to their types; and the number of research studies mentioning
ethical clearance, consent, and assent were expressed as percentages
mentioning ethical clearance, consent and assent were expressed as
percentages. Results: Of the 132 manuscripts reporting biomedical
research, 39 (29.53%) reported having obtained approval from the ethics
committee. Forty-six of the 98 (46.94%) manuscripts reporting on
prospective studies indicated that informed consent was obtained from
parents or lawful guardians. Neither ethical approval nor informed
consent was mentioned in 45 (34.10%) published articles reporting
prospective studies. A total of 54/98 (55.1%) studies enrolled children
aged 7 years or more and hence were assessed for reporting of assent;
eight (14.81%) reported that children′s assent was obtained. Only
four (7.41%) eligible studies reported ethics committee′s
approval, informed consent, as well as assent. Conclusions: A
significant proportion of research articles published in the two
pediatric journals did not provide information regarding ethical
approval, written informed consent, and obtaining of assent
Mapping circular economy practices for steel, cement, glass, brick, insulation, and wood – A review for climate mitigation modeling
No full textCircular economy (CE) practices pave the way for the construction sector to become less material- and carbon-intensive. However, for CE quantification by climate mitigation models, one must first identify the CE practices along a product (or material) value chain. In this review, CE practices are mapped for the value chain of 6 construction materials to understand how these practices influence and can be considered in climate mitigation modelling. The main sub-categories of steel, cement, glass, clay-brick, insulation materials, and wood were used to identify which Rs are currently addressed at the lab and industrial scales: refuse, reduce, rethink, repair, reuse, remanufacture, refurbish, repurpose, recycle, and recover. The CE practices were reviewed using scientific repositories and grey literature, validated by European-wide stakeholders, and mapped across the life-cycle stages of the six materials – extraction, manufacturing, use, and end-of-life (EoL). The mapping was limited to the manufacturing and EoL stages because materials could be identified at these stages (the extraction phase pertains to resources, and the use phase to a product, for example, buildings). All reviewed CE practices identified at the industrial scale were quantified at the European level. For example, EoL reinforcement steel is 1–11 % reused and 70–95 % recycled; manufacturing CEM I is up to 60 % reduced; remanufacturing flat glass is 26 % remanufactured while less than 5 % EoL flat glass is recycled. A major barrier to closed-loop recycling is the need for sorting and separation technologies. Open-loop recycling synergies are found at the industrial scale between, for example, flat glass and glass wool value chains. Climate mitigation models are proposed to be augmented to include these practices requiring an explicit link between building use and the other construction materials' value chain stages. © 2024 The Author(s
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