1,229 research outputs found
Search for an Optimal Solution to Vague Traffic Problems Using the PSK Method
No full textThere are several algorithms, in literature, for obtaining the fuzzy optimal solution of fuzzy transportation problems (FTPs). To the best of the author's knowledge, in the history of mathematics, no one has been able to solve transportation problem (TP) under four different uncertain environment using single method in the past years. So, in this chapter, the author tried to categories the TP under four different environments and formulates the problem and utilizes the crisp numbers, triangular fuzzy numbers (TFNs), and trapezoidal fuzzy numbers (TrFNs) to solve the TP. A new method, namely, PSK (P. Senthil Kumar) method for finding a fuzzy optimal solution to fuzzy transportation problem (FTP) is proposed. Practical usefulness of the PSK method over other existing methods is demonstrated with four different numerical examples. To illustrate the PSK method different types of FTP is solved by using the PSK method and the obtained results are discussed. </jats:p
Supplementry_Information - Study on the effect of silica–graphite filler on the rheometric, mechanical, and abrasion loss properties of styrene–butadiene rubber vulcanizates
No full textSupplementry_Information for Study on the effect of silica–graphite filler on the rheometric, mechanical, and abrasion loss properties of styrene–butadiene rubber vulcanizates by AM Shanmugharaj, K Thileep Kumar, G Sivagaami Sundari, E Senthil Kumar, A Ashwini, M Ramya, P Varsha, R Kalaivani, S Raghu, and SH Ryu in Journal of Elastomers & Plastics</p
PSK-Method-for-Solving-Mixed-and-Type-4-Intuitionistic-Fuzzy-Solid-Transportation-Problems.pdf
No full text In this article, the author categorises the solid transportation problem (STP) under uncertain environments. He formulates the mixed and fully intuitionistic fuzzy solid transportation problems (FIFSTPs) and utilizes the triangular intuitionistic fuzzy number (TIFN) to deal with uncertainty and hesitation. The PSK (P. Senthil Kumar) method for finding an intuitionistic fuzzy optimal solution for fully intuitionistic fuzzy transportation problem (FIFTP) is extended to solve the mixed and type-4 IFSTP and the optimal objective value of mixed and type-4 IFSTP is obtained in terms of triangular intuitionistic fuzzy number (TIFN). The main advantage of this method is that the optimal solution of mixed and type-4 IFSTP is obtained without using the basic feasible solution and the method of testing optimality. Moreover, the proposed method is computationally very simple and easy to understand. Finally, the procedure for the proposed method is illustrated with the help of numerical examples which is followed by graphical representation of the finding. </p
Scalable asynchronous connected components detection based on a parallel union-find algorithm
No full textConnectivity in a graph is a well-studied problem. Various parallel algorithms to detect and label connected components exist, many of which are optimized for a shared-memory environment. However, scientific and engineering applications today process large-scale graphs that do not fit in a single compute node. This calls for a highly scalable solution to the connectivity problem. We propose a novel distributed-memory parallel algorithm based on the Union-Find data structure and asynchronous messaging. We strengthen the scalability of our approach by introducing several optimization techniques for parallel execution. The algorithm is implemented as a library using Charm++, a migratable object-based parallel programming model, allowing any Charm++ application to easily perform connected components detection. MPI applications may also use the library either via Adaptive MPI, or by using interoperability features of Charm++. In addition, the library will also support reading data from the disk. As a driving use case we utilize the library in ChaNGa, a cosmological simulation framework, to detect clusters of stars and classify galaxies. We evaluate the performance of our algorithm for real and synthetic graphs, computing connectivity on a probabilistic mesh benchmark with over 250 million edges in under 10 seconds using 4,096 cores of the Blue Waters (Cray XE) Supercomputer.Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2020-05-01The student, - Senthil Kumar Karthik, accepted the attached license on 2018-04-24 at 16:01.The student, - Senthil Kumar Karthik, submitted this Thesis for approval on 2018-04-24 at 16:17.This Thesis was approved for publication on 2018-04-24 at 17:09.DSpace SAF Submission Ingestion Package generated from Vireo submission #12454 on 2018-08-31 at 17:21:26Made available in DSpace on 2018-09-04T20:36:54Z (GMT). No. of bitstreams: 2
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Previous issue date: 2018-04-24Embargo set by: Seth Robbins for item 107306
Lift date: 2020-09-04T20:37:00Z
Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD systemEmbargo set by: Seth Robbins for item 107306
Lift date: 2020-09-04T20:42:08Z
Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD systemU of I Only Restriction Lifted for Item 107306 on 2020-09-05T09:15:09Z
Psychometric Properties of the Physical Activity Questionnaire for Older Children in Italy: Testing the Validity Among a General and Clinical Pediatric Population
No full textThe purpose of this research was to assess an Italian version of the Physical Activity Questionnaire
for Older Children (PAQ-C-It). Three separate studies were conducted, whereby
testing general psychometric properties, construct validity, concurrent validity and the factor
structure of the PAQ-C-It among general and clinical pediatric population. Study 1 (n =
1170) examined the psychometric properties, internal consistency, factor structure (exploratory
factor analysis, EFA) and construct validity with enjoyment perception during physical
activity. Study 2 (n = 59) reported on reliability, construct validity with enjoyment and BMI,
and on cross-sectional concurrent validity with objectively measured MVPA (tri-axial accelerometry)
over the span of seven consecutive days. Study 3 (n = 58) examined the PAQ-CIt
reliability, construct validity with BMI and VO2max as the objective measurement among a
population of children with congenital heart defects (CHD). In study 2 and 3, the factor structure
of the PAQ-C-It was then re-examined with an EFA. The PAQ-C-It showed acceptable
to good reliability (alpha .70 to .83). Results on construct validity showed moderate but significant
association with enjoyment perception (r = .30 and .36), with BMI (r = -.30 and -.79
for CHD simple form), and with the VO2max (r = .55 for CHD simple form). Significant concurrent
validity with the objectively measured MVPA was reported (rho = .30, p < .05). Findings
of the EFA suggested a two-factor structure for the PAQ-C-It, with items 2, 3, and 4
contributing little to the total score. This study supports the PAQ-C-It as an appropriate
instrument to assess the MVPA levels of Italian children, including children with simple
forms of CHD. Support is given to the possible instrument effectiveness on a large international
perspective in order to level out data gathering across the globe
Green synthesis of a redox-active riboflavin-integrated Ni-MOF and its versatile electrocatalytic applications towards oxygen evolution and reduction, and HMF oxidation reactions
No full textThe post-synthetic modification (PSM) of metal-organic frameworks (MOFs) with redox-active molecules under mild conditions is a highly challenging approach to modify the inherent properties of MOFs without altering their crystallinity and other characteristics. Here, we prepared a single crystal Ni-MOF with a two-dimensional rod-like morphology. Furthermore, we utilized the PSM technique to incorporate redox-active riboflavin (Rbf) in the Ni-MOF using a green and facile mechanochemical method under solvent-free conditions. The Rbf-doped Ni-MOF (Rbf-Ni-MOF) showed a 4-fold increase in conductivity compared to the pristine Ni-MOF. We employed the Rbf-Ni-MOF as a multifunctional electrocatalyst towards the oxygen evolution reaction (OER), oxygen reduction reaction (ORR) and oxidation of 5-hydroxymethylfurfural (HMF). As an OER electrocatalyst, the Rbf-Ni-MOF delivered a high current density of 580 mA cm−2, which is around 26-fold greater than those of Rbf and the pristine Ni-MOF. The prep..
Phosphazene-Based Covalent Organic Polymer Decorated with NiCo2O4Nanocuboids as a Trifunctional Electrocatalyst: A Unique Replacement for the Conventional Electrocatalysts
No full textDeveloping nonprecious metal-based electrocatalysts to convert water into green fuels (H2 and O2) is key to address urgent climate and energy challenges. We have prepared an electrocatalyst by the immobilization of NiCo2O4 on a phosphazene-based covalent organic polymer (P-COP) through a facile hydrothermal method. The elemental composition of the P-COP showed the presence of a greater amount of heteroatoms N (6.62%) and P (5.62%) throughout the polymer support. Scanning transmission electron microscopy (STEM) and electron energy loss spectroscopy (EELS) were utilized to determine the atomic structure of the nanocuboids, which depicted the formation of an inverse spinel structure. A NiCo2O4-P-COP-based electrode was simultaneously used for the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER), and it displayed a minimum overpotential of 270 and 130 mV (V vs RHE), respectively, at a current density of 10 mA cm-2. In addition, it acted as an oxygen reduction catalyst with a half-wave potential of 0.83 V (V vs RHE) and a maximum current density of 4.5 mA cm-2. The electrocatalytic activity is comparable with that of the commercially available Pt and RuO2 catalysts. The combined experimental and computational studies confirm that the catalytic centers formed through the interaction between the heteroatoms (N and P) in the phosphazene matrix and metal oxides (Co and Ni) play an important role in its improved durability and electrocatalytic activity
PSK Method for Solving Mixed and Type-4 Intuitionistic Fuzzy Solid Transportation Problems
No full textIn this article, the author categorises the solid transportation problem (STP) under uncertain environments. He formulates the mixed and fully intuitionistic fuzzy solid transportation problems (FIFSTPs) and utilizes the triangular intuitionistic fuzzy number (TIFN) to deal with uncertainty and hesitation. The PSK (P. Senthil Kumar) method for finding an intuitionistic fuzzy optimal solution for fully intuitionistic fuzzy transportation problem (FIFTP) is extended to solve the mixed and type-4 IFSTP and the optimal objective value of mixed and type-4 IFSTP is obtained in terms of triangular intuitionistic fuzzy number (TIFN). The main advantage of this method is that the optimal solution of mixed and type-4 IFSTP is obtained without using the basic feasible solution and the method of testing optimality. Moreover, the proposed method is computationally very simple and easy to understand. Finally, the procedure for the proposed method is illustrated with the help of numerical examples which is followed by graphical representation of the finding
In Vitro Antioxidant and Insulin Mimetic Activities of Heteroleptic Oxovanadium(IV) Complexes with Thiosemicarbazones and Naproxen
No full textSix heteroleptic oxovanadium(IV) complexes with general formula [VOL1–6(nap)], where, L1–3=2-(1-(4-substitutedphenyl)ethylidene)hydrazinecarbothioamide, L4–6=2-(1-(4-substitutedphenyl)ethylidene)-N-methylhydrazinecarbothioamide and nap=naproxen, have been synthesized and characterized. FTIR spectra exhibit a strong band between 965 and 991 cm−1, characteristic of υ(V=O) stretching vibration. UV-Vis and theoretical studies suggested distorted square-pyramidal geometry and oxidation state of vanadium(IV) with d1 configuration was confirmed by EPR spectra. Cyclic voltammograms exhibit metal based irreversible redox peaks corresponding to one electron oxidation (+0.83 to +0.70 V) and reduction (−0.69 to −0.53 V) processes. In vitro antioxidant studies revealed that complexes containing electron donating substituent (−CH3) showed higher activity. In vitro antidiabetic activity of complexes with enzymes like α-amylase, α-glucosidase and glucose-6-phosphatase made them better inhibitors of insulin, which is further supported by in silico studies, and complex 6 shows better in vitro insulin mimic activity against insulin responsive 3T3-L1 adipocyte cells compared to insulin and metformin.No Full Tex
Continuous supply chain collaboration : Road to achieve operational excellence
No full textSupply chain management (SCM) is becoming critical as firms recognize that competition is shifting from company versus company to supply chain versus supply chain. In the present competitive scenario, the fierce competition has driven most companies to seek means of enhancing performance beyond their four wall boundaries. The firm’s ability in collaborating with its upstream and downstream partners determines its success in attaining better performance with supply chain collaboration; a firm is able to serve fragmented markets in which end customers require more product varieties and availability with shorter product life cycle and at the same time lower supply chain costs. Hence, this paper introduces the framework of continuous supply chain collaboration (CSCC), which extends the traditional frame of reference in strategic sourcing from a supplier centric to a supply-chain-scope as continuous improvement efforts to enhance the customer satisfaction. CSCC practices are rather exceptional, yet CSCC is believed to be the single most comprehensive framework for attaining operational excellence.Continuous supply chain collaboration (CSCC); Supply chain management: Continuous improvement; Operational excellence; Supply Chain Management
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