A social relationship-based energy efficient routing scheme for Opportunistic Internet of Things

Rani,Amita Malik 한국통신학회 2023 ICT Express Vol.9 No.4

Opportunistic Internet of Things (OppIoT) combines Opportunistic Networks and the Internet of Things to provide opportunistic communication between IoT devices and human-created communities in order to improve network connectivity, reliability, and longevity. This is significant because it introduces a new approach to connect and communicate smart devices in situations where there is no end-to-end connectivity. Due to the non-stable existence of connectivity between nodes, building a scalable, flexible, interoperable, and energy efficient routing protocol is a difficult issue. This study presents a new routing protocol for the Opportunistic Internet of Things called Social relationship based Energy Efficient Routing (SEER), which bases routing decisions on the forwarding feasibility degree, residual energy, and buffer capacity of nodes. SEER surpasses EBR and EDR in terms of delivery probability, hop count, and overhead ratio, according to simulation results utilizing the Opportunistic Network Environment (The ONE) simulator.

ID- Based Authentication for WiMAX

Pushpi Rani1,Brijesh Kumar Chaurasia,Geetam Singh Tomar 보안공학연구지원센터 2016 International Journal of Future Generation Communi Vol.9 No.2

WiMAX is broadband wireless system being used for long range wireless networking, which makes this system vulnerable to security breaches. In this paperwe present authentication scheme using ID-based signature scheme for WiMAX, which offers a certificate-less public key verification. The proposed scheme has also increased message processing throughput as it has used elliptic curve cryptosystem, sigencryption and identity based cryptography.

Excess molar enthalpies of binary mixtures of formamide with butanol at 298.15 K: Application of Prigogine–Flory–Patterson theory and Treszczanowicz–Benson association model

Manju Rani,Sanjeev Maken,Shalu Agarwal,Priyanka Lahot 한국공업화학회 2013 Journal of Industrial and Engineering Chemistry Vol.19 No.5

Excess molar enthalpies (HEm ) of formamide (1) + 1-butanol or 2-methyl-1-propanol or 2-methyl-2-propanol (2) mixtures have been measured at 298.15 K over the entire composition range using flow micro calorimeter. The excess enthalpy data along with previously published excess volumes data (VEm )(M. Rani, S. Maken, J. Ind. Eng. Chem. 18 (2012) 1694) have been utilised to study the thermodynamics of molecular interactions in terms of Prigogine–Flory–Patterson theory and Treszczanowicz–Benson association model with a Flory contribution term. The Treszczanowicz–Benson model was developed for alkane + alkanol systems considering Mecke–Kempter type of association in alkanol. In this paper the Treszczanowicz–Benson association model was applied, for the first time, to binary mixtures containing both components associated (butanol and formamide) through hydrogen bonding. In both the cases,when either of formamide or butanol was assumed to be associated, the calculated HEm and VEm values compared reasonably well with the corresponding experimental data, but the agreement is not very impressive for excess enthalpy in formamide + 2-methyl-2-propanol mixtures. Extent of inter-molecular H-bonding in formamide and butanols in their binary mixtures was also reflected in their molar enthalpy of association of H-bonding Dh0H.

Differences in Health-related Fatty Acids, Intramuscular Fat and the Physico-chemical Quality in Mutton as Affected by Season, Place of Purchase and Meat Portion

Rani, Zikhona T.,Nantapo, Carlos W.T.,Hugo, Arnold,Muchenje, Voster Asian Australasian Association of Animal Productio 2014 Animal Bioscience Vol.27 No.11

The objective of the study was to determine the quality and fatty acid profiles of mutton cuts purchased from rural and urban localities in South Africa. Five hundred and ten samples were collected in four seasons from both rural and urban shops and butcheries. Samples were immediately transported to the laboratory in cooler boxes with ice where the following physico-chemical characteristics of mutton were determined; meat pH, color ($L^*$, $a^*$, and $b^*$), cooking losses and Warner Braztler shear force and replicates stored at $-20^{\circ}C$ pending fatty acid analysis. Meat $L^*$ values were lowest ($24.7{\pm}0.49$) in winter and highest ($32.2{\pm}0.49$) in spring. The loin and sirloin cuts recorded the highest intramuscular fat whilst rib and leg cuts recorded the lowest intramuscular fat. In conclusion intramuscular fat, fatty acid profiles and physico-chemical quality of mutton were significantly affected by season and meat portion and not necessarily by the locality and class of shop.

Polyaniline supported nanocomposite cation exchanger: Synthesis, characterization and applications for the efficient removal of Pb2+ ion from aqueous medium

Rani Bushra,Mu. Naushad,Rohana Adnan,Zeid A. AlOthman,Mohd Rafatullah 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.21 No.1

Polyaniline Sn(IV) tungstomolybdate nanocomposite (PSTM) was synthesized by sol–gel method. Thephysico-chemical properties of PSTM were studied using FTIR, TGA, XRD, SEM, and TEM. The materialwas successfully used for the removal of Pb2+. Batch experiments were performed as a function of variousexperimental parameters such as effect of pH (2–8), contact time (5–60 min), initial Pb2+ concentration(10–30 mg L 1) and temperature (20–50 8C). The removal rate of Pb2+ using PSTM was fast andequilibrium established within 50 min. Kinetic studies showed better applicability for pseudo-firstordermodel. The values of thermodynamic parameters (DG8, DH8 and DS8) were also computed.

Computational Analysis of the 3-D structure of Human GPR87 Protein: Implications for Structure-Based Drug Design

Rani, Mukta,Nischal, Anuradha,Sahoo, Ganesh Chandra,Khattri, Sanjay Asian Pacific Journal of Cancer Prevention 2013 Asian Pacific journal of cancer prevention Vol.14 No.12

The G-protein coupled receptor 87 (GPR87) is a recently discovered orphan GPCR which means that the search of their endogenous ligands has been a novel challenge. GPR87 has been shown to be overexpressed in squamous cell carcinomas (SCCs) or adenocarcinomas in lungs and bladder. The 3D structure of GPR87 was here modeled using two templates (2VT4 and 2ZIY) by a threading method. Functional assignment of GPR87 by SVM revealed that along with transporter activity, various novel functions were predicted. The 3D structure was further validated by comparison with structural features of the templates through Verify-3D, ProSA and ERRAT for determining correct stereochemical parameters. The resulting model was evaluated by Ramachandran plot and good 3D structure compatibility was evidenced by DOPE score. Molecular dynamics simulation and solvation of protein were studied through explicit spherical boundaries with a harmonic restraint membrane water system. A DRY-motif (Asp-Arg-Tyr sequence) was found at the end of transmembrane helix3, where GPCR binds and thus activation of signals is transduced. In a search for better inhibitors of GPR87, in silico modification of some substrate ligands was carried out to form polar interactions with Arg115 and Lys296. Thus, this study provides early insights into the structure of a major drug target for SCCs.

Genomic potential of Marinobacter salinus Hb8^T as sulfur oxidizing and aromatic hydrocarbon degrading bacterium

Rani, S.,Jeon, W.J.,Koh, H.W.,Kim, Y.E.,Kang, M.S.,Park, S.J. Elsevier Science B.V. Amsterdam 2017 MARINE GENOMICS Vol.34 No.-

Marinobacter salinus Hb8<SUP>T</SUP> was isolated from a tidal flat and its complete genome sequence was obtained using the PacBio RS II platform. The length and G+C content of the complete circular chromosome were about 4.12Mbp and 55.9%, respectively. Genomic analysis showed the strain has degradation capabilities for urea, aromatic and reduced sulfur compounds. These results reveal its potential application in biotechnology. Finally, the genome sequence of M. salinus Hb8<SUP>T</SUP> provides the fundamental genomic information for future studies.

Introduction to Cambodian Legal and Juridical System

( Rany Sam ),( Emtotim Sieng ),( Limkry Khim ) 제주대학교 법과정책연구소 2015 국제법무 Vol.7 No.1

본 논문에서는 캄보디아의 법률과 사법 제도, 법률 교육뿐만 아니라 캄보디아 법조계의 조사를 목적으로 하고 있다. 인도 차이나와 동남아시아 2 개국, 즉 라오스, 베트남과 마찬가지로 프랑스의 식민체제는 1863년 8월 11일부터 1953년 11월 9일까지 거의 한 세기동안 캄보디아 법체계에 도입되었다. 또한 식민지화, 정치 이념, 그리고 대외 원조도 직접적으로 캄보디아 법제도에 영향을 주었다. 가장 중요한 것은 1993년 10월 23일에 있었던 캄보디아 파리 평화협정 후 캄보디아의 법 제도가 민사 및 관습법 제도를 복원하고 혼합했다는 것이다. 본 논문에서는 정부 문서,학술 논문, 교과서 및 원조국 문서를 포함한 2차 자료(보조자료)를 기반으로 하여 주로 기술적인 접근 방식을 채택하고 있다. 그러므로 학생, 연구자, 변호사, 학자가 현재 캄보디아의 법률과 사법 제도에 대한 더 나은 이해를 심화하는데 중요한 논문검토가 될 것이다. This paper aims at investigating Cambodian legal and juridical system, legal education as well as the legal profession in Cambodia. Similar to two countries in the Indochina and South-East Asia, namely Laos and Vietnam, the French colonized system had introduced into the Cambodian legal system for almost a century started from August 11, 1863 to November 9, 1953. Moreover, the colonization, political ideologies, and foreign assistances also directly influenced Cambodian legal system. The most importantly, after the Paris Peace Agreement of Cambodia on October 23, 1993, the legal system of Cambodia has restored and mixed with civil and common law systems. This paper employs a predominantly descriptive approach based on secondary sources including government documents, academic papers, textbooks, and donor country documents. Therefore, this review paper would be significant for students, researchers, lawyers, and academicians to deepen their better understanding of current Cambodian legal and juridical system.

Tribological Properties of Ultrananocrystalline Diamond Films in Inert and Reactive Tribo-Atmospheres: XPS Depth-Resolved Chemical Analysis

Rani, Revati,Panda, Kalpataru,Kumar, Niranjan,Sankaran, Kamatchi Jothiramalingam,Ganesan, K.,Lin, I-Nan American Chemical Society 2018 The Journal of Physical Chemistry Part C Vol.122 No.15

<P>Tribological properties of diamond films are sensitive to the chemically reactive and inert tribo-atmospheric media, and therefore, it is difficult to understand the underlying tribological mechanisms. In the present work, tribological properties of surface-modified ultrananocrystalline diamond (UNCD) thin films were investigated in four distinct tribo-environmental conditions of ambient humid-atmosphere, nitrogen (N<SUB>2</SUB>), argon (Ar), and methane (CH<SUB>4</SUB>) gases. The in situ depth-resolved X-ray photoelectron spectroscopy (XPS) showed the desorption of oxygen and oxy-functional additives and sputtering of weakly bonded amorphous carbon species from the UNCD film surface after the Ar<SUP>+</SUP>-ion sputtering process. After desorption of these chemical entities, friction and wear were decreased and run-in regime cycles became shorter in UNCD films. Friction in the ambient humid-atmosphere was higher compared to other tribo-environmental conditions, and it was explained by the oxidation mechanism of the sliding interfaces and the formation of the oxidized carbon transferfilm. However, low friction and wear in the N<SUB>2</SUB> atmosphere was associated with the adsorption of N<SUB>2</SUB> species, forming nitrogen-terminated carbon bonds at the sliding interfaces. This was directly investigated by XPS and energy dispersive X-ray spectroscopy techniques. Furthermore, low friction in the Ar atmosphere was explained by the physical adsorption of Ar gaseous species, which tend to avoid the covalent carbon bond formation across the sliding interfaces. Moreover, ultralow friction in the CH<SUB>4</SUB> atmosphere was governed by the passivation of dangling carbon bonds by dissociative CH<SUB>4</SUB> complexes, which creates hydrogen-terminated repulsive sliding interfaces. More importantly, a shorter run-in regime with low friction and wear in Ar<SUP>+</SUP>-ion-sputtered UNCD films were explained by desorption of the oxygen and oxy-functional groups, which are inherently present in the UNCD films.</P> [FIG OMISSION]</BR>

Layer-by-Layer Self-Assembled Graphene Multilayers as Pt-Free Alternative Counter Electrodes in Dye-Sensitized Solar Cells

Rani, Adila,Chung, Kyungwha,Kwon, Jeong,Kim, Sung June,Jang, Yoon Hee,Jang, Yu Jin,Quan, Li Na,Yoon, Minji,Park, Jong Hyeok,Kim, Dong Ha American Chemical Society 2016 ACS APPLIED MATERIALS & INTERFACES Vol.8 No.18

<P>Low cost, charged, and large scale graphene multilayers fabricated from nitrogen-doped reduced graphene oxide N-rGO(+), nitrogen and sulfur codoped reduced graphene oxide NS-rGO(+), and undoped reduced graphene oxide rGO(-) were applied as alternative counter electrodes in dye-sensitized solar cells (DSSCs). The neat rGO-based counter electrodes were developed via two types of layer-by layer (LBL) self-assembly (SA) methods: spin coating and spray coating methods. In the spin coating method, two sets of multilayer films were fabricated on poly(diallyldimethylammonium chloride) (PDDA)-coated fluorine-doped tin oxide (FTO) substrates using GO(-) combined with N-GO(+) followed by annealing and denoted as [rGO(-)/N-rGO(+)](n) or with NS-GO(+) and denoted as [rGO(-)/NS-rGO(+)](n) for counter electrodes in DSSCs. The DSSCs employing new types of counter electrodes exhibited similar to 7.0% and similar to 6.2% power conversion efficiency (PCE) based on ten bilayers of [rGO(-)/N-rGO(+)](10) and [rGO(-)/NS-rGO(+)](10), respectively. The DSSCs equipped with a blend of one bilayer of [rGO(-):N-rGO(+)] and [rGO(-):NS-rGO(+)] on PDDA-coated FTO substrates were prepared from a spray coating and showed similar to 6.4% and similar to 5.6% PCE, respectively. Thus, it was demonstrated that a combination of undoped, nitrogen-doped, and nitrogen and sulfur codoped reduced graphene oxides can be considered as potentially powerful Pt-free electrocatalysts and alternative electrodes in conventional photovoltaic devices.</P>