bluuebunny/crossref_metadata_2025 huggingface dataset:
CLOUD COMPUTING
Authors: Kumar Dr. Vinod , Raheja Er. Gagandeep , Sodhi Ms. Jyoti
Published: May 2018

Cloud computing is the delivery of computing as a service rather than a product, whereby shared resources, software, and information are provided to computers and other devices as a utility (like the electricity grid) over a network (typically the internet). Cloud computing provides computation, software, data access, and storage services that do not require end-user knowledge of the physical location and configuration of the system that delivers the services. Parallel to this concept can be drawn with the electricity grid, wherein end-users consume power without needing to understand the component devices or infrastructure required to provide the service.
A REVIEW ARTICLE OF CLOUD COMPUTING
Authors: Kaur Mandeep , Kaur Amandeep , Kaur Mandeep
Published: May 2018

Cloud computing has become a significant technology trend, and many experts expect it to reshape information-technology processes and the IT marketplace during the next five years.This keynote paper: presents a 21st century vision of computing; identifies various computing paradigms promising to deliver the vision of computing utilities; defines Cloud computing and provides the architecture for creating market-oriented Clouds by leveraging technologies such as VMs; provides thoughts on market-based resource management strategies that encompass both customer-driven service management and computational risk management to sustain SLA oriented resource allocation; presents some representative Cloud platforms especially those developed in industries along with our current work towards realising market-oriented resource allocation of Clouds by leveraging the 3rd generation Aneka enterprise Grid technology; reveals our early thoughts on interconnecting Clouds for dynamically creating an atmospheric computing environment along with pointers to future community research; and concludes with the need for convergence of competing IT paradigms for delivering our 21st century vision.
Are Internet-Based Services More Sustainable?
Authors: Wolfson Adi , Tavor Dorith , Mark Shlomo
Published: May 2018

The Internet has affected a revolution in our behavior and communication as well as in how we perceive and implement services. It offers new opportunities, like the self-service mode, a service operated mainly by the customer, which enables the more efficient and conscious use of resources, technologies, and knowledge, and thus an opportunity to imbue the service with sustainability. Yet, such a move does not occur in a vacuum, and it demands a corresponding behavioral shift by both provider and customer, who have the shared responsibility to educate themselves about, and to monitor, the sustainability of the service(s) in which they are interested. As such, it is the providerâ€™s duty to supply a sustainable solution while the customer, who has obtained the information necessary to rate the alternatives, should choose the most sustainable one.The power of internet-based services is not only in their availability and ease of operation, but also in the efficiency manifested in the customerâ€™s ability to perform several services together with virtually the same resources and effort. While these advantages can be easily superimposed on any design to ensure more sustainable services, the same properties may lead to increased, unsustainable consumerism.
Change Detection on SAR data using PCA Algorithm
Authors: Srivastava Saurabh , Kumar Vijay , Gupta Rahul , Kaur Supreet
Published: May 2018

In this paper, we proposed an approach for unsupervised change detection technique on SAR data. Change detection is process of automatically identifying and analyzing the regions which undergone some changes such as spatial or spectral changes. As various techniques are available to change detection but are used for general satellite images. In order to detect change on SAR images we use PCA technique which detect the change by finding the different pixel using threshold level and compare with earlier image one.
Enhancing the performance of web Focused CRAWLer Using Ontology
Authors: Yadav Prasant , Kalra Mrs Mala , Yadav Dr. K.P
Published: May 2018

The enormous growth of the World Wide Web in the recent years has made it important to perform resources discovery efficiently. The rapid growth of World Wide Web poses (Doubles in size approximately every eight months) unprecedented scaling challenges for general purpose crawler and search engine. Finding useful information from the web which has a large and distributed structure required efficient search strategies. As ontology plays an important role in providing controlled vocabulary of concepts, each with an explicitly defined and machine process able semantics. In this paper ,we propose the novel concept of intelligent crawling of Ontology based content focused crawling , the new approach that analyses it crawl boundary to find the links that are likely to be the most relevant for the crawlÂ  while a boundary irrelevant region of the web. Through our new focused crawling technique we solve the polysemy (refer to word with multiple meaning) and synonymy (refers to multiple word having the same meaning) semantic net problem. Also instead of searching in the whole web, our proposed technique will search in the ontology build by us that is updated periodically after a very short interval than instead of displaying all the information that is not related to the user need, we will display only relevant and related information. Our purposed work give us twoÂ  fold benefit , firstly only focused result are retrievedÂ  which reduce the number of results entreated and secondly, due to focused searching irrelevant result are pruned which reduce the time.
HEAP: Hybrid Energy-efficient Aggregation Protocol for Large Scale Wireless Sensor Networks
Authors: Simon Santhosh , Jacob K Paulose
Published: May 2018

Wireless sensor networks (WSNs) can be meritoriously used in several application areas like agriculture, military surveillance, environmental monitoring, forest fire detection etc. Since they are used to monitor large geographic areas numerous sensor nodes are to be deployed and their radio range is also very short. Hence they depend on the cooperative effort of these densely deployed sensor nodes for reporting the sensed data. Any changes in environment or an event of interest may be initially observed in a particular area. In other words, they are correlated in space domain. Many nodes in that area may detect the event and report the same event. This redundant information is of no use to system and also depletes the precious energy of the intermediate sensor nodes. Sensor nodes are having very limited energy and needs to be conserved for attaining maximum network life time. Data aggregation is an effective technique for conserving energy by reducing the packet transmissions. Many aggregation systems are available, but when employed for large scale wireless sensor networks they are less effective. In this paper we propose a scheme for large scale WSNs which effectively uses the spatial correlation and temporal correlation of the data for effective aggregation and thereby preserving precious energy.
ANALYSIS AND COMPARISION OF SRG AND DFIG FOR WIND GENERATION APPLICATION
Authors: Lenin Dr. N. C. , Prathap K.
Published: May 2018

Renewable energy is very important topic to be study to find new sources of energy to produce electricity. The main advantages of the renewable energy are available, clean, low cost, and continuous energy.The main objective of this paper is to document the comparative and absolute advantages and disadvantages of using Switched Reluctance Generator (SRGâ€Ÿs) and Doubly Fed Induction Generator (DFIGâ€Ÿs) in wind generation. The comparative study is based on the machine parameters like inductance, flux linkage, torque, output power, weight and cost. Performance analysis has been carried out using Finite Element Analysis (FEA). The predicted results show SRGâ€ŸS has the optimal choice for Wind Generation.
Steganography: Securing Message in wireless network
Authors: Kamal A H M
Published: May 2018

Steganography is the process of hiding a secret message with in a cover medium. However eavesdropper may guess the embedding algorithm like least significant bit (LSB) replacement of Chan et al, 2004; Wang et al, 2001; Wu et al, 2005, LSB matching of Mielikainen, 2006, addition and/or subtraction of Andead wastfield, 2001; F. Huang et al in 2011, Exploiting Modification Direction by Zhang and Wang, 2006, Binary Space Partition by Tsai and Wang, 2007, modulus function of Chin et al, 2011 and thus can apply the respective extraction method to detect the secret message. So challenges lies in the methodologies of embedding message. Capacity, security and robustness are the services to be demanded by users. Again the true-positive rate of secret message detection by eavesdropper should be lessened by applying firm technique. Thirdly operating domain should be less sensitive to the noise, margin level of losses or alteration of data while communicating through unguided medium like wireless network, sensor network and cellular network. This paper will briefly discuss the steganographic methods and their experimental results explained in the survey paper of Niels Provos and Peter Honeyman to hide and seek message. Finally the proposed results and the directions for future works are addressed.
BUILDING LEXICON FOR TELUGU SPEECH RECOGNITION
Authors: Sunitha K. V. N. , Sharada A.
Published: May 2018

Speech recognizers usually consist of a language model, a lexicon and a collection of phone models. The lexicon for a language is important to improve the efficacy of speech recognizer for a language. Traditionally building a lexicon for a language was a significant piece of work taking several expert linguists perhaps several years to construct a lexicon with reasonable coverage. However we include a method here that can cut this time significantly. The basic idea is add the most common words to a lexicon where explicitly the user of the system gives the new word, then automatically build letter to sound rules from the initial data. The word entered might be of any arbitrary length. Over multiple passes the lexicon and letter to sound rules will improve. As each pass the letter to sound rules are re-generate with the new data making them more correct. This paper presents the work done in building a lexicon for Telugu language. The major objective is to make the speech systems for Telugu language more proficient. This technique has been proved successful for a number of languages cutting the amount to time and effort to perhaps checking thousands of words rather than tens of thousands of words. It also is a structured method that requires only knowledge of the basic language to carry out.
Simulation Tool for Queuing Models: QSIM
Authors: Saxena Dr. Pratiksha , Sharma Lokesh
Published: May 2018

This paper proposes simulation software QSIM (Queuing Simulation) to simulate queuing models. QSIM is a tool which simulates and compares the results of different queuing models. This tool is programmed in JAVA and is based on analytical approach to guide optimization strategy. In Qsim, Simulation is carried out by providing the inputs for arrival rate, service rate and number of servers and using these values the performance measurement of a particular model is stored in the database for further comparisons and study. Simulation results are stored in excel file and it also provides graphical results to compare the outcome.
Review of Acknowledgment Based Techniques for Detection of Black Hole/Gray Hole Attacks in MANETs
Authors: Kaur Rajveer , Rani Dr. Shaveta , Singh Dr. Paramjeet
Published: May 2018

In Mobile Ad hoc NETworks (MANETs) nodes communicate via wireless links, without any fixed infrastructure like base stations, central servers or mobile switching. Each node in MANET can act as a host or as a router. Due inherent characteristics like decentralization, self configuring, self -organizing networks, they can be deployed easily without need of expensive infrastructure andÂ  have wide range of military to civilian and commercial applications. But wireless medium, dynamically changing topology, limited battery and lack of centralized control in MANETs, make them vulnerable to various types of attacks. This paper focus on network layer packet dropping attacks â€“ Black Hole & Gray Hole attacks in Dynamic Source Routing (DSR) based MANETs and discuss various pros and cons of acknowledgement based techniques for detection of above said attacks.
Comparative Analysis of Kohonen-SOM and K-Means data mining algorithms based on Academic Activities
Authors: Dhingra Shaina , Gilhotra Rimple , Ravishanker Ravishanker
Published: May 2018

With the increasing demand of IT and subsequent growth in this sector, the high- dimensional data came into existence. Data Mining plays an important role in analyzing and extracting the useful information. The key information which is extracted from a huge pool of data is useful for decision makers. Clustering, one of the techniques of data mining is the mostly used methods of analyzing the data. In this paper, the approach of Kohonen SOM and K-Means and HAC are discussed. After that these three methods are used for analyzing the academic data set of the faculty members of particular university. Finally a comparative analysis of these algorithms are done against some parameters like number of clusters, error rate and accessing rate, etc. Â This work will present new and improved results from large-scale datasets.
MOBILE AGENT APPLICATION DEVELOPMENT IN A SIMPLE JAVA-BASED MOBILE AGENT SYSTEM (SIMMAS)
Authors: Osunade O. , Oloritun R. D.
Published: May 2018

As network information resources grew in size, it was most efficient to process queries and updates at the site where the data was located. The processing accomplished by a traditional client-server network interface constrained the client to the set of queries supported by the server, or required the server to send all data to the client for processing. The former was inflexible and the latter was inefficient. Mobile agents support the movement of the client computation to the location of the remote resource. It has the potential to be flexible and efficient. Mobile agents are capable of suspending their execution, transporting themselves to another host on a network, and resuming execution from the point at which they were suspended. Mobile agents consume fewer network resources and support systems that do not have permanent network connections, such as mobile computers and personal digital assistants. This work described a prototype java based mobile agent environment for the development and deployment of mobile agent applications. The prototype called SIMMAS allowed programmer-developed applications to inherit mobility.
Forensic Analysis of Databases by Combining Multiple Evidences
Authors: Khanuja Harmeet Kaur , Adane Dr. D.S.
Published: May 2018

The information security for securing enterprise databases from internal and external attacks and violations of mutual policy is an interminable struggle. With the growing number of attacks and frauds, the organizations are finding it difficult to meet various regulatory compliance requirements such as SOX, HIPAA, and state privacy laws. The aim here is to develop a methodology which monitors the database transactions on continuous basis and to make a decision whether the database transactions are legitimate or suspicious by combining multiple evidences gathered. The suspicious transactions can then be used for forensic analysis to reconstruct the illegal activity carried out in an organization. This can be achieved by incorporating information accountability in Database Management System. Information accountability means, the information usage should be transparent so that it is possible to determine whether a use is appropriate under a given set of rules. We focus on effective information accountability of data stored in high-performance databases through database forensics which collects and analyses database transactions collected through various sources and artifacts like data cache, log files, error logs etc. having volatile or non-volatile characteristics within high performance databases. The information and multiple evidences collected are then analyzed using an Extended Dempster-Shafer theory(EDST). It Â combines multiple such evidences and an initial belief is computed for suspected transactions which can be further used for reconstructing the activity in database forensics process.
Improving Efficiency of META Algorithm Using Record Reduction
Authors: Bidhan Shweta , Garg Dr. Kanwal
Published: May 2018

Erasable Itemset Mining is the key approach of data mining in production planning. The erasable itemset mining is the process of finding erasable itemsets that satisfy the constraint i.e. user defined threshold. Efficient algorithm to mine erasable itemsets is extremely important in data mining. Since the META Algorithm was proposed to generate the erasable itemsets. In last few years there have been several methods to improve its performance. But they do not consider the time constraint. If database is large META takes too much time to scan the database. In this paper, Author purposed an Improved META (I-META) algorithm which reduces the scanning time by reduction of production records. It also reduces the redundant generation of sub-items during trimming the candidate itemsets, which can find directly the set of erasable itemsets and removing candidate having a subset that is not erasable.
Comparative Performance Analysis of Different Routing Protocols in Wireless Ad-hoc networks (IEEE 802.11)
Authors: Kumar Mahendra , Jain A. K.
Published: May 2018

Wireless Ad-hoc networks have lack of mass deployment. An Ad hoc wireless network has a dynamic nature that leads to constant changes in its network topology.Â  There is an infrastructure less and decentralized network which need a robust dynamic routing protocol. This article presents performance comparison of wireless Ad-hoc network on different routing protocols. Network simulator QualNet 5.0.2 has been used to evaluate the performance of wireless networks with various routing protocols.
Defending Against Denial of Sleep Attack in Wireless Sensor Network
Authors: Vc Manju , Kumar. Dr.Sasi
Published: May 2018

A wireless sensor network is a wireless network organized with a large number of sensor nodes with specialized sensors that can monitor various physical attributes such as temperature, pressure, vibration, and sound. Sensor nodes are powered up with batteries. Due to unattended nature of the deployment, the sensor nodesâ€™ batteries cannot be recharged. In such conditions, the nodes must optimally consume power. Various protocols are designed to reduce the energy consumption of sensor nodes by keeping the antenna in sleep mode 90% of time, so that power is saved. MAC protocols are designed to adaptively vary the sleep time based on the communication need. But attackers use their knowledge of their underlying MAC protocol, to reduce the sleep time for the node, so that the lifetime of a node reduces. This problem is popularly known as Denial of sleep attack. In this paper, we propose an effective solution }to defend against such attacks inÂ  a sensor network. Our proposed solution introduces communication overhead only when the attack is suspected and also the defending mechanism is triggered only in the area of attack. Also the analysis shows that our solution is very strong against SYNC replay attack and jamming attacks.
Test Case Selection and Prioritization for Regression Testing using Fault Severity
Authors: Sharma Uma , Rastogi Vedant
Published: May 2018

Regression testing is a significant but a very expensive testing process .Test case prioritization is a technique to schedule and execute the test cases in such an order that results in increasing their ability to meet some performance goal. One of the main goal is to increase the rate of fault detection â€“i.e. to detect the faults as early as possible during the testing process. Test case prioritization is used to minimize the expenses of regression testing. This paper  proposes  a technique  to select and prioritize the test cases and  results in   improving  the rate of fault detection.
Synthesis, spectral characterization, cyclic voltammety, molecular modeling and catalytic activity of sulfa-drug divalent metal complexes
Authors: Abdou Safaa N. , Faheim Abeer A. , M. A. Alaghaz Abdel-Nasser
Published: May 2018

Complexes of cobalt(II), nickel(II), copper(II), zinc(II) and Hafnium(II) of general composition [M(L)2(Cl)2] have been synthesized [L = 4-(phenylphosphinylideneamino-N-thiazolylbenzenesulfonamide]. The elemental analysis, molar conductance measurements, magnetic susceptibility measurements, mass, IR, UV, NMR, SEM, EDX, thermal and EPR spectral studies of the compounds led to the conclusion that the ligand acts as a bidentate manner. The molar conductance of the complexes in fresh solution of DMSO lies in the range of 7.46–9.13 Ω-1 cm2mol‒1 indicating their non-electrolytic behavior. On the basis of analytical and spectroscopic techniques, octahedral geometry of the complexes was proposed. The ligand acts as bidentate ligand, coordinated through sulfonamide oxygen and thiazole nitrogen atoms. The ligand field parameters were calculated for Co(II), Ni(II) and Cu(II) complexes and their values were found in the range reported for a octahedral structure. The catalytic activities of the divalent metal complexes have been studied in the oxidation of cyclohexane, using environmental friendly oxidant, hydrogen peroxide. Complex with rough surface has shown higher catalytic activity compared to the other complexes. The molecular parameters of the ligand and its Co(II) and Hf(II) complexes have been calculated.
Determination and assessment of essential elements in Acacia Nilotica-a medicinal and folk uses by different analytical methods
Authors: Madbouly Magdy Diab , Salih Mutaz Ezzeldien , Ahmed Ali Elmugdad , Kamel Laila Tosson
Published: May 2018

Acacia Nilotica is a good source of several nutrient elements essential for some metabolic processes. The pods of Acacia Nilotica collected from different areas in Sudan have been analysed for 6 minor (Li, Na, K, Mg, Ca, P) and 3 trace (Fe, Zn, Mn) elements by flame photometry and atomic absorption spectrophotometry using the standard addition and calibration curve methods, respectively. The phosphorous, however, was determined U.V. spectrophotometrically using the standard addition method for measurement of the absorbance, at 410 nm of the complex produced by the coupling of meta-molybdate ammonium vanadate with phosphorous. The ash content, density, colour and pH were also determined by standard methods. The results obtained showed that acacia nilotica samples have been found to be especially rich in several nutrient elements such as, K, Fe and P. Concentration of elements are discussed vis-à-vis their medicinal/therapeutic uses. Several statistics like PCA and correlation matrix between elements and pH were performed to the dataset in order to distinguish between geogenic enrichment, lithiogenic, and anthropogenic pollution elements found in the pods. The results suggested anthropogenic and geogenic origin of Na, Ca, P, Fe, Zn, Mn, while Li, K, Mg  showed lithogenic and/or geogenic origin and was associated and controlled by mixed origin.
Toxicological Impacts of Gas flaring and Other Petroleum Production Activities in Niger-Delta Environment
Authors: C. O. Ujowundu , C.O Ajoku , L. A Nwaogu , D. C. Belonwu , K.O Igwe
Published: May 2018

In this study, the concentrations of inducers of environmental toxicity such as heavy metals and polycyclic aromatic hydrocarbon and biomarkers of environmental toxicants such as oxidative stress enzymes/compounds and liver function enzymes were determined. These parameters were used to assess the pollution status of some Niger-Delta areas; Ebocha/Omoku, Abacheke/Egbema, and Okwuzi/Ohaji, with the aid of two indicator species: cat fish (Ictalurus punctatus) and snakehead fish (Channa argus) from three different water sources; Ebocha/Omoku river, Abacheke river and Okwuzi creek all of which are within the area of oil exploration and production activities in Nigeria. The control fish and water samples were collected from Otamiri River within the Federal University of Technology, Owerri, Nigeria, with no known oil exploration and production activity. The results obtained indicated significant (p < 0.05) differences between the exploited and the unexploited environment and the need to incorporate biochemical markers in environmental impact assessment of aquatic environments to complements the classical chemical monitoring.
Dehydration and decomposition behavior of the NaH2(PO4)0,48AsO4)0,52.H2O compound in the temperature range from 253 K to 333 K.
Authors: Jarraya Khaled , Mhiri Taher , Le Goff Xavier
Published: May 2018

The mixed compound NaH2(PO4)0.48(AsO4)0.52.H2O, which has been examined by Raman spectroscopy, XRD powder and dielectric, exhibits solid–solid phase transitions and one reversible solid–liquid phase transition. Besides, the investigation of dehydration behavior of sodium dihydrogenate phosphate-arsenate monohydrate was undertaken in a temperature range from 253 K to 333 K. The onset temperature of dehydration was determined from changes in ionic conductivity and X-ray powder on heating. It was confirmed by the Raman study not only in the disappearance of the vibrations assigned to the PO4, AsO4  but also in the appearance of the new vibrations attributed to the (PO3), which constitutes the P-O-P chain, giving a polymer with the formula: NaH2(P2O7)x(As2O7)(1-x).  The important variation was observed in all studies at 313 K, which could correspond to the transformation of the NDAP compounds of a solid crystal into a liquid form.
Discovery anti-diabetic potent ofthiazolidinedione derivative based on virtual screening against aldose reducates
Authors: Elhenawy A.A. , Abdel All Mahmoud M. , A. Alomri Abd aziz
Published: May 2018

Thiazolidinedione (1) was used as a key intermediate for the synthesis of many therapeutic anti-diabetic molecule. Thus, Thiazolidinedione (1) was refluxed with aromatic aldehydes and phenol derivatives to afforded aryldine derivative (3). Moreover, the stereochemistry for compound 3 was discussed using Hartree-Fock theory geometries, and have been optimized at HF with 6-311G level of theory. The HOMO-LUMO energy gap of studied systems has been discussed. The molecular docking simulations into the active site of ALR2 were performed, and showed that, the compound 3 more suitable inhibitor against ALR2 and can used as anti- diabetic drug.
SYNTHESIS OF CHALCONES VIA CLAISEN–SCHMIDT CONDENSATION REACTION CATALYZED BY SILICA-H2SO4 UNDER ULTRASOUND IRRADIATION
Authors: Lahyani Achraf , Chtourou Manef , Frikha Mohamed Hédi , Trabelsi Mahmoud
Published: May 2018

The synthesis of 1,3-diaryl-2-propenones was carried out by using ultrasonic irradiation in the presence of silica-H2SO4, which was used as a catalyst in solvent-free conditions. The advantages of this process are the high yields (82–98%) it produces, the cost effectiveness of the catalyst, and the simple work-up and purification of products achieved via a non-chromatographic method.
A new Rubidium - Bismuth polyphosphate RbBi(PO3)4: Growth, X-ray single crystal and vibrational study
Authors: JAOUADI Khaled , MHIRI Tahar , ZOUARI Nabil
Published: May 2018

Solid-solution studies in the ternary Rb2O – Bi2O3 – P2O5 system, carried out in a search for inorganic materials have a considerable interest mainly for their optical properties, specifically in laser technology, yielded the new compound RbBi(PO3)4. Single-crystal X-ray measurement revealed that RbBi(PO3)4 crystallizes in space group P21/c with a structural type IV and has lattice parameters a = 10.430, b = 8.984, c = 12.967 Å,  = 126.1°, Z = 4 and V = 981.6 Å3. The all eighteen atoms were located in the asymmetric unit. Refinement using anisotropic temperature factors for all atoms yielded weighted residuals based on F and F2 values, respectively, of R1 = 0.0131 and WR2 = 0.0252 for all observed reflections. The atomic arrangement can be described as a long chain polyphosphate organization, helical ribbons (PO3)n. Two types of infinite chains, with a period of eight PO4 tetrahedra run along the longest unit-cell directions. Infrared and Raman spectra at room temperature, were investigated, show clearly some characteristics bands of infinite chains structure of PO4 tetrahedra linked by a bridge oxygen.
Ionic behavior, Na+ mobility and infrared spectroscopy in Na7Cr4(P2O7)4PO4 material
Authors: Bourguiba Noura Fakhar , Boughazala Habib , Zid Mohamed Faouzi
Published: May 2018

The title compound, heptasodium tetrachromium(III) tetrakis(diphosphate) orthophosphate, was synthesized by solid state reaction. Its structure is isotypic with that of Na7M4(P2O7)4PO4 (M = In, Al) compounds and is made up from a three-dimensional [(CrP2O7)4PO4]7- framework with channels running along [001]. The Na+ cations are located in the voids of the framework. This compound has been investigated by X-ray diffraction and infrared (IR) spectroscopy. The conductivity measurements of the compound were carried out from 515 to 795 Kelvin using the frequency response analyzer with 0.05V amplitude signal over the range of 13MHz-5Hz. The conductivity of the sample at 574K is 0.45 10-6 S.cm-1. The activation energy Ea=0.73eV shows that Na7Cr4(P2O7)4PO4 is a medium ionic conductors. The monovalent cations conduction pathways in the crystal bulks are simulated by means of the bond valence model (BVS).
Convenient Synthesis of Some New Bi-heterocycles conataining 3-Aminoquinazolin-4(3H)-one and 1,2,4-Triazole moieties
Authors: Zaki Yasser H. , Mohamed Mahmoud A.
Published: May 2018

Dicarboxylic acids, thiosemicarbazides and methylanthranilate reacted to give methyl-2-(3-(5-mercapto-4-s-1,2,4-triazol-3-yl)-3-oxoalkylamino)benzoates 4. The laters, cyclized with hydrazine hydrate to give 3-amino-2-((5-mercapto-4 substitued-1,2,4-triazol-3-yl)alkyl)quinazolin-4(3H)-ones 5 which expected to have biological effects.
Synthesis, structural and optical properties of Mn doped ZnO nanoparticles and their antibacterial application
Authors: Srithar A. , Kannan J.C. , Senthil T.S.
Published: May 2018

In the present investigation, MnxZn1-xO (x = 0.05, 0.075 and 0.1%) nanoparticles have been synthesized by simple precipitation method. Their structural, morphological and optical properties were examined by using X-ray diffraction (XRD), Field emission scanning electron microscopy (FESEM), Energy dispersive X-ray spectroscopy (EDX), High resolution transmission electron microscopy (HRTEM), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, Differential scanning calorimetry (DSC) and UV-Visible spectroscopy. The Powder X-ray diffraction studies confirmed that the manganese doped ZnO have a single phase nature with hexagonal wurtzite structure and Mn successfully incorporated into the lattice position of Zn in ZnO lattice. The FESEM and HRTEM images are coincided with each other for aggregation of particles in nature. The elemental analysis of doped samples has been evaluated by EDX. The antibacterial activity of Mn doped ZnO nanoparticles has also been examined.
CFD investigation of the cold hydrodynamics of a laboratory scale CFB furnace
Authors: Vasan A.Mercy , Prasanna N. , Vivekanandan M. , Gopalakrishnan V.
Published: May 2018

This investigation presents a computational and experimental study of the flow characteristics of a laboratory scale CFB cold model riser. i) The first part of the work deals with 2D, CFD validation of a literature based CFB riser of circular cross section of 1m height. Simulation results showed good agreement with experimental literature data for radial profiles of volume fraction and particle velocity. ii) The second part is a work on simulation and experimental verification of a CFB riser flow characteristics of a CFB riser of rectangular cross section (400mm x 550mm x2000mm). An experimental run on the test rig was conducted for sand of 300 micron size at a fluidization velocity of 4 m/s and the fluidization behavior was captured on a high speed camera. For simulation, 3D, transient, Euler-ian approach combined with the Kinetic theory of Granular flow and Gidaspow drag model was used to describe the gas–particle behavior. A frame by frame visual comparison of instantaneous volume fraction distribution was made between camera images and 3D simulated profiles. A further graphical comparison between experimental literature data and simulated 3D profiles of volume fraction and particle velocity profiles yielded fairly good results. It was observed that, in spite of non inclusion of turbulence factor in the current 3D simulation, no significant influence was observed in the results
Investigation of Wear Behaviour of Al6061 reinforcement with TiC and MoS2
Authors: Rajesh S. , Velmurugan C.
Published: May 2018

Metal matrix composite (MMC) focuses primarily on improved specific strength, high temperature and wear resistance application. Aluminum matrix reinforced with titanium carbide and molybdenum disulfide has good potential and also self-lubrication. The main challenge is to produce this composite in a cost effective way to meet the above requirements. In this study Alâ€“TiC-MoS2 castings with different volume fraction of TiC and MoS2 were produced in an argon atmosphere by an enhanced stir casting method. Hardness of the composite has increased with higher % of TiC addition. At that same time self-lubrication of composite has occur in the effort of MoS2. Dry sliding wear behavior of AMC was analyses with the help of a pin on disc wear and friction monitor. The present analyses reveal the improved hardnessÂ  as well as wear resistance.
Studies on Biodiesel Synthesis Using Nanosilica Immobilised Lipase in Inverse Fluidized Bed Bioreactors
Authors: Narayanan C. M. , Pandey Aditi
Published: May 2018

Biodiesel synthesis from neem oil and methyl acetate using lipase catalyst immobilised in nanosilica particles in a continuous inverse fluidised bed bioreactor of modified design has been analysed. The process has been simulated mathematically by developing a multiparameter software package and subsequently verified through pilot plant tests(experiments).The improved performance characteristics of the bioreactor of proposed design have been highlighted. Graphical data have been presented to illustrate the dependence of reactor performance on system/operating parameters such as substrate flow rate, catalyst loading and molar ratio of oil to acetate in the blend(substrate solution).The downflow mode of operation is an added advantage of these bioreactors which tends to reduce their operating cost. Due to the use of nanoparticles, the effectiveness factor is close to unity and consequently, the global rate of transesterification is more or less equal to the intrinsic rate. This enhances the performance efficiency of the bioreactor.
Preparation , Characterization, and Theoretical Treatment Complexes Of Some Transition Metals with N5 Acyclic Derived From 2,6-diacetyl pyridine
Authors: Al-Obaidi Omar
Published: May 2018

A series  of  transition  metal  complexes with [2,6-diacetimino-pheylenediamine –[2,2,diyl] pyridine ]of the general  formula [MLCl]Cl , M= Co(II), Ni(II) and Cu(II) , respectively  have been  synthesized  and  fully characterized  on the bases  of C.H.N.M  elemental analysis, 1HNMR , UV- Visible and FTIR spectra , in addition the structure of complexes was characterized by  magnetic moments and molar conductance in DMSO solution ,and molar ratio of metal  were also determined. From the above of these studies and measurements suggest an octahedral geometry around Co(II) , Ni(II) and Cu(II) .A theoretical treatment of the formation of complexes in the gas phase was studied, this was done using the HYPERCHEM-6 program for the Molecular mechanics and Semi-empirical calculations.
Selective C-methylation of phenol with methanol over transition metals modified mesoporous ceria catalysts
Authors: K.J Rose Philo , S Sugunan
Published: May 2018

The demand for selective catalysts with larger molecular dimensions led to the discovery of mesoporous catalytic materials. We report herein the development of an environmentally friendly process for C-methylation of phenol derivatives with methanol using mesoporous ceria modified with transition metals.  Selective C-methylation of phenol, has been investigated over transition metals loaded mesoporous ceria. Catalyst reaction rates at various reaction parameters were also investigated. 98% selectivity for ortho-alkylated products (o-cresol and 2, 6-xylenol) was obtained. The reaction is proved to be first order with phenol conversion. The frequency factor A and the activation energy Ea were also evaluated with (CeFe10%) catalyst.
Effect of Aqueous Extract of Vitis Vinifera l. Leaf on the Rabbit Females Have Highly Thyroxine Induced by Levothyroxine Sodium
Authors: Mohammed Dr. Taghreed Uloom , H.Ali Bushra , K.Baker Rajaa , F. Hassan Dheefaf
Published: May 2018

L-Thyroxine(T4) and triiodothyronine(T3)are iodine-containing hormones produced from thyroglobulin in the thyroid follicular cells. The stimulation of metabolic rate and regulation of growth and development by these hormones appear to be due to their effects on DNA transcription and, thus, protein synthesis. The aqueous extract of vitis vinifera L. was investigated for its effect on hormones in rabbits. The aqueous extract of plant at a dose level of 50µg/rabbit showed highly significant (p<0.05)on levels of hormones T4, TSH but TSH no significant. L-thyroxine sodium treated group showed a highlysignificant increase in T3 and T4 while there was a highly significant decrease in TSH. From the above results, it is concluded for the first time that aqueous vitvs vinifera L. extract offers significant effect of T3, T4 and TSH in this rabbit females compared with control.
Infrared and Thermal Analysis of Vanadyl(II) Barbiturate Complex
Authors: El-Megharbel Samy M. , Refat Moamen S.
Published: May 2018

An usual method for the preparation of vanadyl(II) barbiturate complex was performed under the chemical reaction of vanadyl(II) sulfate with barbituric acid (H2L) and formulated as: [VO(HL)2].2H2O. This new barbiturate complex was synthesis and characterized by elemental analysis, molar conductivity, magnetic measurements, infrared spectral method and simultaneous thermal analysis (TG/DTG) techniques. The molar conductance measurements proved that barbiturate vanadyl(II) complex is non-electrolytes. The infrared spectra of the barbituric and vanadyl(II) complex are used to identify the mode of coordination. Kinetic and thermodynamic parameters (E*, ΔH*, ΔS* and ΔG*) of H2L ligand and its complex are estimated according to the DTG curves.
An HPLC Method for the Determination of Saxagliptin in Human Plasma with Fluorescence Detection
Authors: Kepekci Tekkeli Serife Evrim , Kızıltaş Mustafa Volkan , Dinçel Demet
Published: May 2018

A sensitive and selective HPLC method with fluorometric detection was developed for the determination of saxagliptin (SGX) in human plasma and applied to a pharmacokinetic study. SGX was precolumn derivatized with fluorescamine, and the fluorescent derivative was separated on an RP C18 column using a mobile phase composed of acetonitrile-10 mM orthophosphoric acid by isocratic elution with flow rate of 1.3 ml/min. The method was based on the measurement of the derivative using fluorescence detection at 378 nm, with excitation at 463 nm. The calibration curve was linear over the range of 3.0–100.0 ng/ml. LOD and LOQ were found to be 0.15 and 0.5 ng/ml, respectively. Intraday and interday RSD values were less than 2.84%. The plasma concentration–time profile and pharmacokinetic parameters such as AUC0–t, AUC0–∞, Cmax, tmax, t1/2, were calculated according to the assays.
Investigation of Inhibition Effect of Acrylic acid on C-Steel Corrosion in Sulfuric Acid Solutions
Authors: Wanees S. Abd El , Salem Salah , A Shehata A.M.A , Azim M. Abd El
Published: May 2018

Acrylic acid was tested as a corrosion inhibitor for C-steel in 0.5 M H2SO4 using gasometry, weight loss, and galvanostatic polarization techniques. Polymeric film is built up by cyclic voltammetry technique. The potentiodynamic polarization is used to examine the inhibition effect with the coated polymeric film. The data obtained from the different techniques coincide in that acrylic acid is a good mixed-type inhibitor. The inhibition process is based on the adsorption of acrylic acid on the surface of C-steel according to Temkin’s adsorption isotherm. The inhibition efficiency increases with inhibitor concentration and decreases with temperature. The thermodynamic parameters ΔE, ΔH*, ΔS*, and ΔG*ads were calculated to elaborate the mechanism of corrosion inhibition.
Study the Nature and the Effects of the Impurities of Phosphate Rock in the Plants of Production of Phosphoric Acid
Authors: Chaabouni Ahmed , Chtara Chaker , Nzihou Ange , Feki Hafed EL
Published: May 2018

Phosphate rocks from different deposits vary widely in composition, and these variations have important effects in phosphoric acid production. All phosphate rocks contain many impurities. Knowledge of the nature and contents of the various elements in the phosphate is required in the manufacturing process of phosphoric acid. All these chemical characteristics can help the operator to foresee its objectives under the operating conditions and the cost of production in the manufacturing process of phosphoric acid.Two Tunisian natural phosphates coming from two different deposits were selected. We propose in this work studying the effects of the impurities that depending on their concentration can affect decisively the behavior of these ores in the process of production of phosphoric acid. Study the chemical composition of these ores is carried out according to standard analytical methods used for raw phosphates.The results obtained show a slight difference in chemical properties between the two types of sedimentary phosphates and their aptitude to be used in the plants of production of phosphoric acid.
Electrochemical Behavior of Selenium as Part of Composite Electrode in Sulfuric Acid Medium
Authors: Abduali Baeshov , Nikolay Ivanov , Begzat Myrzabekov
Published: May 2018

The method of productiion of the composite selenium-graphitic electrodes based on organic polymer binder was proposed. Electrochemical behavior of the elementary selenium as content of composite electrode in sulfuric acid medium was assessed. A formation of hydrogen selenide during the cathode polarization, and formation of selenite and selenate ions was shown. An influence of potential spread velocity, acid concentration, and temperature of electrolyte were evaluated. Effective activation power for cathode process was estimated using the temperature-cathodic method.
A Facile Synthesis of Pyrimidoquinazoline Derivatives
Authors: Boukthir Mona , Zribi Fathi , Belhouchet Mohamed , Chabchoub Fakher
Published: May 2018

A series of pyrimidoquinazoline are prepared via the reaction of ethyl 2,2-dicyano-1-arylvinylcarbamate derivatives 1a-b with methyl 2-aminobenzoate, 1-(2-aminophenyl)ethanone and 2-aminobenzonitrile. The reactivity of compounds 1a-b toward 3-amino-4,6-diphénylnicotinonitrile are studied. The structures of the synthesized compounds are elucidated by X-ray diffraction, IR spectroscopy and nuclear magnetic resonance.
Synthesis, Crystal Structure and Vibrational Properties of bis (N-benzylmethylammonium) Pentachlorobismuthate (III)
Authors: Khili Hiba , Chaari Najla , Fliyou Mohamed , Chaabouni Slaheddine
Published: May 2018

The [C8H12N]2 BiCl5 compound crystallised in the triclinic system with space group  P-1  with a = 9,833(4),                     b = 10,044(7), c = 12,225(7) Å, a= 78.82(4), β = 75,42(4), g= 76.89°(5)  and Z = 2. The average density value, ρx = 1.518 g.cm-3  is in agreement with the calculated one, ρx = 1.494 g.cm-3. The atomic arrangement can be described as an alternation of organic and inorganic layers. The anionic layer is built up of octahedral [Bi2Cl10]-4. The organic layers are arranged in sandwich between the anionic ones. The crystal packing is governed by means of the ionic N–H---Cl hydrogen bonds, forming a three dimensional network. The nature of the distortion of the inorganic polyhedra has been studied and can be attributed to the stereo activity of the Bi(III) lone electron pair. The infrared and Raman spectra was recorded in the 4000–400 cm-1 frequency region.
Characteristics of Patients Treated Psychoterapeutically in the Outpatient Clinical Setting
Authors: Samardžić Ljiljana
Published: May 2018

The influence of social changes in transitional country and transitional times, among other things, have made changes in the structure of the patients seeking psychotherapeutic treatment. However, there has not been any research studying characteristics of patients in psychotherapeutic treatment. The aim of our study was to establish socio-demographic, clinical and psychodynamic characteristics of patients psychotherapeutically treated in the outpatient clinical setting.

Our sample consisted of 61 non-psychotic patients, randomly selected by the method of consecutive admissions and treated with psychoanalytic psychotherapy in the outpatient clinical setting. The study was conducted from January 2009 to January 2012 at the Mental Health Clinic, Clinical Center Niš. Mini International Neuropsychiatric Interview, Global Assessment of Functioning Scale and a Semi-structured interview for the Operationalized Psychodynamic Diagnosis were used for collecting data.

Our results have shown that patients treated with psychotherapy in the outpatient clinical setting have specific socio-demographic, clinical and psychodynamic characteristics. They are young, post-adolescent individuals, mainly with the diagnosis personality disorder and co-morbidity, with a moderate level of structural integration and individuation vs. dependency as the main psychological conflict. We suggest a long-term psychodynamic psychotherapy as the treatment of choice for patients with presented clinical and psychodynamic characteristics and operationalized psychodynamic diagnostic system as a valuable tool for establishing treatment focus and treatment planning.
Developing Leadership Culture in the Context of the Fourth Industrial Revolution: Theory and Practice
Authors: Thanh Pham Ngoc
Published: May 2018

Abstract: This paper focuses on the impact of the Fourth Industrial Revolution on the development of leadership culture through the analysis of the relationship between leadership culture and industrial revolutions. Furthermore, the article addresses the methodological issues of developing leadership culture under the impact of the Fourth Industrial Revolution.

Keywords: Leadership culture, cultural leadership, the Fourth Industrial Revolution
As influências de Malba Tahan para a Educação Matemática: o legado de um educador à frente de seu tempo
Authors: Souza Aldiléia da Silva , Moreira Geraldo Eustáquio
Published: May 2018

O presente artigo busca discutir e trazer à tona a importância de Júlio César de Melo e Souza, cujo pseudônimo é Malba Tahan, para o cenário do ensino e aprendizagem da Matemática na atualidade. De forma mais restrita, o texto apresenta as influências de Malba Tahan para o fortalecimento e aprimoramento da Educação Matemática. Os principais elementos constituidores do artigo trazem uma breve história de sua vida, do seu nascimento ao reconhecimento mundial. De seguida, elegemos as seis principais obras do autor, propiciando ao leitor conhecimentos mínimos das temáticas por ele abordadas, o que pode ser rico instrumento de motivação para o ensino e aprendizagem de Matemática, além de enfatizarmos suas ideias e formas de atuação pedagógica. Também foi discutida a atualidade de suas obras e contribuições para o desenvolvimento do gosto pela Matemática.