Special Issue No. – 1, March, 2019

Abstract:

The paper presents an overview of graphene electronic structure in light of a general concept of emergent phenomena that result from the quantum phase transition caused by continuous symmetry breaking. Spin symmetry breaking of graphene, provided by a drastic enhancement of pz odd electron correlation, is complemented with time symmetry breaking. Taking together, the two issues give a clear vision of emergent spin peculiarities of graphene chemistry and predictably point to occurrence of emergents related to graphene physics, such as ferromagnetism, superconductivity and topological non-triviality.

Keywords:

Dirac fermions,topological insulator,high temperature ferromagnetism,interfacial superconductivity,graphene, time inverse symmetry,

Refference:

I.Anderson P.W. (1972). More isdifferent.Science, 177: 393-396.

II.Bach V., Lieb E. H., Solovej J.P. (1994). Generalized Hartree-Fock theory and the Hubbard model, Journ. Stat. Phys., 76: 3-89.

III.Checkelsky J.G., Ye J., Onose Y., Iwasa Y., Tokura Y. (2012). Dirac-fermion–mediatedferromagnetism in a topological insulator.Nature Phys., 8: 729-733.

IV.CobasE.D., van ‟t ErveO.M.J., ChengS.-F., CulbertsonJ.C., JerniganG.G., BussmanK., JonkerB.T. (2016). Room-temperature spin filtering in metallic ferromagnet–multilayer graphene–ferromagnet junctions.ACS Nano, 10:10357–10365.

V.Coe J.P., Paterson M.J. (2016). Open-shell systems investigated with Monte Carlo configuration interaction. Int. J. Quant. Chem., 116:1772–1782.

VI.Cui Y., Bulik I.W., Jiménez-Hoyos C.A., Henderson T.M., Scuseria G.E. (2013). Proper and improper zero energy modes in Hartree-Fock theory and their relevance for symmetry breaking and restoration.J. Chem. Phys.139:154107.

VII.Di Bernardo A., Millo O., Barbone M., Alpern H., Kalcheim Y., Sassi U., Ott A.K., De Fazio D., Yoon D., Amado M., Ferrari A.C., Linder J., Robinson J.W.A. ((2017). p-Wave triggered superconductivity in single-layer graphene on an electron-doped oxide superconductor.Nat. Commun., 8: 14024.

VIII.Dreiser J., Pacchioni G.E., Donati F., Gragnaniello L., Cavallin A., Pedersen K.S., Bendix J., Delley B., Pivetta M., Rusponi S., Brune H. (2016). Out-of-plane alignment of Er(trensal) easy magnetization axes usinggraphene. ACS Nano, 10: 2887–2892.

IX.Enoki T., Kobayashi Y. (2005). Magnetic nanographite: an approach to molecular magnetism. J. Math. Chem., 15: 3999.

X.Gao X., Zhou Z., Zhao Y., Nagase S., Zhang S. B., Cheng Z.J. (2008). Comparative study of carbon and BN nanographenes: Ground electronic states and energy gap engineering.Phys. Chem. A,112: 12677.

XI.Hubač I., Čàrski P.(1983). Perturbation theory for open-shell systems: Simulation of the UHF states by means of the perturbed RHF wave functions.Int. J. Quant. Chem., 24:141-148.

XII.Katmis F., Lauter V., Nogueira F.S., Assaf B.A., Jamer M.E., Wei P.,Satpati B., Freeland J.W., Eremin I., Heiman D., Jarillo-Herrero P., Moodera J.S. (2016). A high-temperature ferromagnetic topological insulating phase by proximity XIII.coupling. Nature, 533: 513-516.

XIV.Khoo K.H., LeongW.S., ThongJ.T.L.,QuekS.Y. (2016).

XV.Origin of contact resistance at ferromagnetic metal–graphene interfaces. American Chemical SocietyNano, 10:11219–11227.

XVI.Kitagawa Y., Saito T., Nakanishi Y., Kataoka Y., Matsui T., Kawakami T., Okumura M., Yamaguchi K. (2009). Spin contamination error in optimized geometry of singlet carbene (1A1) by broken-symmetry method, J. Phys. Chem. A,113:15041–15046.

XVII.Laughlin R. B. (1999). Nobel lecture: Fractional quantization, Rev. Mod. Phys., 71: 863-874.

XVIII.Laughlin R. B., Pines D. (2000). The theory of everything, PNAS, 97: 28-31.

XIX.Löwdin P.-O. (1958). Correlation problem in many-electron quantum mechanics. 1. Review of different approaches and discussion of some current ideas, Adv. Chem. Phys., 2: 209-322.

XX.Liu Q., Liu C.-X., Xu C., Qi X.-L., Zhang S.-C. (2009).

XXI.Magnetic impurities on the surface of a topological

XXII.Insulator. Phys. Rev. Lett., 102: 156603.XXIII.Nai C.T.,Xu H.,Tan S.J.R.,Loh K.P. (2016). Analyzing

XXIV.Dirac cone and phonon dispersion in highly oriented nanocrystalline graphene. ACS Nano, 10: 1681–1689.

XXV.Ning G., Xu C., Hao L., Kazakova O., Fan Z., Wang H.,

XXVI.Wang K., Gao J., Qian W., Wei F. (2013). Ferromagnetism in nanomesh graphene.Carbon, 51: 390-396.

XXVII.Noodleman L. (1981). Valence bond description of antiferromagnetic coupling in transition metal dimmers.J. XXVIII.Chem. Phys., 74: 5737-5742.

XXIX.NovoselovK.S., Fal′koV.I., ColomboL., GellertP.R., SchwabM.G., KimK. (2012). A roadmap for Graphene.Nature, 490: 192-200.

XXX.Pavarini E., Koch E., Schollwöck U., eds. (2013) Emergent Phenomena in Correlated Matter . XXXI.Forschungszentrum Jülich and the German Research School for Simulation Sciences, Jülich.

XXXII.Sepioni M., Nair R.R., Rablen S., Narayanan J., Tuna F., Winpenny R., Geim A.K., Grigorieva I.V. (2010). Limits on

XXXIII.intrinsic magnetism in graphene, Phys. Rev. Lett., 105:

XXXIV.207205.

XXXV.Sheka E.F. (2011). Fullerenes: Nanochemistry, Nanomagnetism, Nanomedicine, Nanophotonics, CRC Press, Taylor & Francis Group, Boca Raton, London, New York.

XXXVI.Sheka E.F. (2015). Stretching and breaking of chemical bonds, correlation of electrons, and radical properties of covalent species. Adv.Quant.Chem.70: 111-161.

XXXVII.Sheka E.F. (2017). Spin Chemical Physics of Graphene.

XXXVIII.Pan Stanford: Singapore.

XXXIX.Sheka E.F. (2018). Dirac material graphene, Rev. Adv.

XL.Mater. Sci., 53: 1-28.

XLI.Tada K., Haruyama J., Yang H. X., Chshiev M., Matsui T., Fukuyama H. (2011). Ferromagnetism in hydrogenated graphene nanopore arrays, Phys. Rev. Lett., 107: 217203.

XLII.Van Fleck J.H. (1932). The Theory of Electric and

XLIII.Magnetic Susceptibilities. Oxford.

XLIV.Yannouleas C., and Landman U. (2007). Symmetry breaking and quantum correlations in finite systems: studies of quantum dots and ultra-cold Bose gases and related nuclear and chemical methods.Rep. Prog. Phys., 70:2067–2148.

XLV.Yazyev O.V. (2010). Emergence of magnetism in

XLVI.graphene materials and nanostructures. Rep. Prog. Phys.,

XLVII.73: 05650130.

XLVIII.Zheng D., Zhang G-M., Wu C. (2011). Particle-hole

XLIX.symmetry and interaction effects in the Kane-Mele-

L.Hubbard model.Phys. Rev. B, 84: 205121.

View | Download

Abstract:

One of the design solutions, saving materials and increasing strength and deformation characteristics of concrete, is the use of indirect reinforcement. The volume of research devoted this problem for bending elements in comparison with compressed elements, is rather low. The aim of the research work is to analyze the influence of the indirect reinforcement on strength and deformation characteristics of the reinforced concrete beams. The test results of three batches of the beams with indirect reinforcement of compressed area in form of cross-welding mesh are given in the research work. Each batch consisted of the sample without mesh and two samples with various coefficients of the indirect reinforcement of compressed area. The batches were different from each other by the area of longitudinal reinforcement. The pattern change from brittle to plastic destruction of the samples was identified in the results of research. In this case, the limit deformability increases considerably with saving the high residual bearing capacity. We noticed that the influence of the indirect reinforcement on the beams work depends on not only coefficient of indirect reinforcement but also the area of longitudinal reinforcement. We explain it by growth of large deformation in concrete of the compressed area in the limit condition and, therefore, more effective inclusion of the indirect reinforcement. The bending reduction is 7.2-14.4% for the samples with mesh, the increase of the bending moment, satisfying the beginning of the concrete destruction of the compressed area, is 11-33%.

Keywords:

Indirect reinforcement,Welding mesh,Plastic destruction,Deformability,Four-point bending,

Refference:

I.Attard M., Samani A.K. (2012). A stress–strain model for uniaxial and confined concrete under compression. Engineering Structures, 41: 335-349.II.Binici B. (2005). An analytical model for stress–strain behavior of confined concrete. Engineering Structures, 27: 1040–1051.

III.ChoiE., ParkS., ChoB., Hui, D. (2013). Lateral reinforcement of welded SMA rings for reinforced concrete columns. Journal of Alloys and Compounds, 577S: 756-759.

IV.ChungH., Yang K., Lee Y., Eun H.. (2002). Stress–strain curve of laterally confined concrete. Engineering Structures. Engineering Structures, 24: 1153-1163.

V.Georgios G. and Lam D. (2004). Axial capacity of circular concrete-filled tube columns. Journal of Constructional Steel Research, 60: 1049-1068.

VI.Hadi M., Elbasha N. (2008), Displacement Ductility of Helically Confined HSC Beams. The Open Construction and Building Technology Journal, 2: 270-279.

VII.Kharun M., Nikolenko Y.V., Stashevskaya N.A., Koroteev D.D. (2017). Thermal Treatment of Self-Compacting Concrete in Cast-In Situ Construction. Key Engineering Materials, 753: 315-320.

VIII.Krishan A.L., Troshkina E.A., Chernyshova E.P. (2016). Efficient design of concrete filled steel tube columns. Procedia Engineering, 150: 1709-1714.

IX.Long Y., Cai J. (2013). Stress–strain relationship of concrete confined by rectangular steel tubes with binding bars. Journal of Constructional Steel Research, 88: 1-14.X.Lu X., Hsu C. (2007). Stress–strain relations of high-strength concrete under triaxial compression. Journal Of Materials In Civil Engineering, 19(3): 261-268.

XI.Nemecek J., Padevet P., Patzak B. and Bittnar Z. (2005). Effect of transversal reinforcement in normal and high strength concrete columns. Materials and Structures, 38: 665-671.

XII.Pessiki S., Graybeal B. (2000). Axial Load Tests of Concrete Compression Members with High Strength Spiral Reinforcement. PCI Journal, Mar-Apr: 64-80

View | Download

Abstract:

The comparative analysis of formation of canonical surfaces in a graphics editor AutoCAD and traditional classical course in descriptive geometry is offered in the present article. The terminology used in computer graphics and descriptive geometry is different. The source data (determinant) and the law of formation of the same surfaces are also significantly different. Some of the surfaces in the general case cannot be formed in AutoCAD. In modern courses of descriptive geometry and computer graphics it is necessary to carry out connection between methods of formation of surfaces in computer and traditional variant for better understanding of properties and structures of surfaces.

Keywords:

descriptive geometry,surface,computer graphics, AutoCAD,

Refference:

I.Aleksandrova E.P., Nosov K.G., Stolbova I.D. (2014). Geometric Modeling as a Tool to Improve the Quality of Graphic Training of Students. Open Education, 5: 20-27. Available online at: https://elibrary.ru/item.asp?id=22316517

II.Aygunyan M.A. (2015). Methodological aspects of the «Descriptive Geometry» subject teaching. Bulletin of the RUDN University: Engineering Research, 3: 157-160. Available online at: https://elibrary.ru/item.asp?id=24307502

III.Aygunyan M.A., Shevchenko D.V. (2017). New Educational Web Resources for the Engineering Course “Descriptive Geometry”. Journal of Fundamental and Applied Sciences, 9:437-446. Available online at: http://www.jfas.info/index.php/jfas/article/view/3340

IV.Knyazkov V.V., Fazlulin E.M. (2014). Geometrical modeling in SolidWorks. Journal of Moscow State Technical University MAMI, 5-1: 170-176. Available online at: https://elibrary.ru/item.asp?id=22599557

V.Korygina O.M. (2015). Construction of tangentsplanes and normals to the rotation surfaces in the 3D modeling software Autodesk Inventor. Cloud of Science, 2-1:100-106. Available online at: https://cloudofscience.ru/sites/default/files/pdf/CoS_2_100.pdf

VI.Korygina O.M. (2016). Drawing the lines of intersection of second-order surfaces in Autodesk Inventor. Cloud of Science, 3-1:60-70. Available online at: https://cloudofscience.ru/sites/default/files/pdf/CoS_3_060.pdf?1

VII.Korygina O.M. (2017). Metric problems’ solution using the method of replacing projection planes in the computer-aided 3D modeling application Autodesk Inventor. Cloud of Science, 4-1:86-96. Available online at: https://cloudofscience.ru/sites/default/files/pdf/CoS_4_086.pdf

VIII.Lyashkov A.A., Volkov V.Y. (2014). Shaping surface the method of the geometric and computer modeling. Bulletin of the Siberian State Automobile-road University, 5: 86-92. Available online at: https://elibrary.ru/item.asp?id=22698340

IX.Nesterenko M., Strashnov S. (2017). Design Automation Based on Parametrization of Second Order Curves in CAD Software. V.A. Trapeznikov Institute of Control Sciences of Russian Academy of Sciences, 11th International Conference on Application of Information and Communication Technologies 2017 20-22 September 2017, Moscow, Russia, 2017. Available online at: http://www.aict.info/2017/info/AICT2017-Conference-Program-DRAFT.pdf

X.Romanova V.A. (2012). Features of the image of process of formation of surfaces in AutoCAD system. Bulletin of the RUDN University: Construction mechanics of engineering structures, 4:3-5. Available online at: https://elibrary.ru/item.asp?id=18078314

XI.Romanova V.A., Oskina G.N. (2011). Visualization of formation Kuns’s surface. Bulletin of the RUDN University: Engineering Research, 4:13-18. Available online at: https://elibrary.ru/item.asp?id=17033849

XII.Romanova V.A., Oskina G.N. (2013). Electronic didactic materials for subject «formation of canonical surfaces». Bulletin of the RUDN University: Engineering Research, 2:19-24. Available online at: https://elibrary.ru/item.asp?id=19038334

XIII.Romanova V.A., Oskina G.N., Giloulbe Mathieu (2014). Visualization of revolving surfaces formation. Bulletin of the RUDN University: Engineering Research, 2:82-87. Available online at: https://elibrary.ru/item.asp?id=21421966

XIV.Romanova V.A., ThomaA. (2016). Automatic modeling of the surface of the same slope in the elliptical plan in AutoCAD through theAutoLisp language. Bulletin of the RUDN University: Engineering Research, 4:48-53. Available online at: https://elibrary.ru/item.asp?id=28341126

XV.Tel’noy V.I., Rychkova A.V. (2014). Application of three-dimensional simulation at lecturing on descriptivegeometry. Bulletin of the Moscow State University of Civil Engineering, 5: 176-183. Available online at: https://elibrary.ru/item.asp?id=21495104

View | Download

Abstract:

A new scheme of static surface plasmon-polaritons (SPPs) interferometer of the terahertz (THz) range is described. The interference pattern is formed due to interaction of two converging SPP beams that have run different distances. The original SPP beam is splitted and reflected by a flat beam splitter and a mirror disposed of the waveguiding surface and normally to it. By varying the distance spacing the splitter and the coupling element one can change the pattern period. Execution of the pattern enables one to determine both the real and imaginary part of the SPPs refractive index, which is uniquely related to the dielectric constant of the surface and the optical characteristics of its transition layer. The operating time of the interferometer is determined by the photodetector time constant, which is extremely important for studying fast processes on a conducting surface. The interferometer can work with broadband THz radiation sources (such as synchrotrons or pulsed lasers) as well.

Keywords:

surface plasmon polaritons,terahertz radiation,static interferometers,plasmon sensors, thin film spectroscopy,

Refference:

I.Agranovich V.M., and Mills D.L. (1982). Surface polaritons. Surface electro-magnetic waves at surfaces and interfaces. Amsterdam, N.-Y., Oxford.

II.Bogomolov G.D., Zhizhin G.N., Kiryanov A.P., Nikitin A.K., and Khitrov O.V. (2009). Determination of the refractive index of IR surface plasmons by static asymmetric interferometry. Bull. Russian Academy of Sciences. Physics, 73(4): 533-536.

III.Bogomolov G.D., Zhizhin G.N., Nikitin А.К., and Knyazev B.A. (2009). Geodesic elements to control terahertz surface plasmons. Nuclear Instrum. and Methods in Phys. Research (A), 603(1/2): 52-55.

IV.Dem’yanenko M.A., Esaev D.G., Marchishin I.V., Ovsyuk V.N., Fomin B.I., Knyazev B.A., and Gerasimov V.V. (2011). Application of uncooled microbolometer detector arrays for recording radiation of the terahertz spectral range. Optoelectronics, Instrumentationand Data Processing, 47(5):109–113.

V.Gan Q.Q., Gao Y., and Bartoli F.J. (2009). Vertical plasmonic Mach–Zehnder interferometer for optical sensing. Optics Express, 17(23):20747–20755.

VI.GerasimovV.V., KnyazevB.A., and Nikitin A.K. (2017). Reflection of terahertz monochromatic surface plasmon-polaritons by a flat mirror. Quantum Electronics, 47(1): 65–70.

VII.GerasimovV.V., Knyazev B.A., Lemzyakov A.G., and Nikitin A.K. (2016). Reflection of terahertz surface plasmons from plane mirrors and transparent

plates. Proc. of the 41-st Intern. Conf. on Infrared, Millim., and Terahertz Waves, IRMMW-THz. Paper H3D.2. Copenhagen, pp. 7758410-7758411. See also http://www.irmmw-thz2016.org/

VIII.GerasimovV.V., Knyazev B.A., Lemzyakov A.G., Nikitin A.K., and Zhizhin G.N. (2016). Growth of terahertz surface plasmon propagation length due to thin-layer dielectric coating. JOSA (B), 33(11): 2196-2203.

IX.KabashinA.V., Nikitin P.I. (1997).Interferometer based on a surface-plasmon resonance for sensor applications. Quant. Electronics, 27(7): 653–654.

X.MaierS.A. (2007). Plasmonics: Fundamentals & Applications. Springer Science+Business Media.

XI.Melentiev P.N., Kuzin A.A., Gritchenko A.S., Kalmykov A.S., Balykin V.I.(2017). Femtosecond plasmon interferometer. Optics Comm., 382: 509-513.

XII.MingY., WuZ.-J., WuH.; XuF.,LuY. (2012). Surface plasmon interferometer and its sensing applications. IEEE Photonics Journal, 4(1): 291-299.

XIII.NazarovM., Garet F., Armand D., Shkurinov A., and Coutaz J.-L. (2008). Surface plasmon THz waves on gratings. Comptes Rendus Physique, 9(2): 232-247.

XIV.NelsonS.G., JohnstonK.S., and YeeS.S. (1996). High sensitivity surface plasmon resonace sensor based on phase detection. Sensors and Actuators (B), 35–36:187–191.

XV.NikitinA.K. (2002). Plasmon optometry. Dr. Sci. Dissertation, Scientific & Technological Center for Unique Instrumentation of RAS, Moscow.

XVI.NikitinA.K., Tishchenko A.A. (1991). Phase SEW-microscopy. Techn. Phys. Lett., 17(11): 76-79.

XVII.StegemanG.I., Wallis R.F., and Maradudin A.A. (1983). Excitation of surface polaritons by end-fire coupling. Optics Letters, 8 (7): 386-388.

XVIII.TemnovV.V., Woggon U., Dintinger J., Devaux E., and EbbesenT.W. (2007). Surface plasmon interferometry: measuring group velocity of surface plasmons. Optics Lett., 32(10): 1235-1237.

XIX.ZhizhinG.N., Kiryanov A.P., Nikitin A.K., and Khitrov O.V. (2012). Dispersive Fourier-transform spectroscopy of surface plasmons in the infrared frequency range.Optics and Spectroscopy, 112(4): 545–550.

View | Download

Abstract:

Equation for spin 1/2 particle with two mass states is investigated in presence of magnetic field. The problem reduces to a system of 4 linked 2-nd order differential equations. After diagonalization of the mixing term, separate equations for four different functions are derived, in which the spectral parameters coincide with the roots of a 4-th order polynomial. Solutions are constructed in terms of confluent hyper-geometric functions; four series of energy spectrum are found. Numerical study of the spectra is performed. Physical energy levels for the two mass fermion differ from those for the ordinary Dirac fermion.

Keywords:

spin 1/2 particle,two mass parameters, external magnetic field,

Refference:

I.Bhabha H.J. (1952). An equation for a particle with two mass states and positive charge density. Philosophical Magazine Series 7, 43(336): 33–47. Available online: http://www.tandfonline.com/doi/abs/10.1080/14786440108520964

II.Capri A.Z.(1969). First order wave equations for multi-mass fermions. Il NuovoCimentoB, 64(1): 151–158. Available online: https://link.springer.com/article/10.1007/BF02710288

III.Fedorov F.I. (1952). Generalized relativistic wave equations. Reports of the Academy of Sciences of the USSR (Доклады Академии наук СССР), 82(1): 37–40 (in Russian). Available online: https://elibrary.ru/contents.asp?titleid=7781

IV.Gel’fand I.M., and Yaglom A.M. (1948). General relativistic invariant equations and infinitely dimensional representation of the Lorentz group. Journal of Experimental and Theoretical Physics (Журнал экспериментальной и теоретической физики), 18(8): 703–733 (in Russian). Available online: https://elibrary.ru/contents.asp?titleid=8682

V.Gel’fand I.M., and Yaglom A.M. (1948). Pauli theorem for general relativistic invariant waveequations. Journal of Experimental and Theoretical Physics (Журнал экспериментальной и теоретической физики), 18(12): 1096–1104 (in Russian). Available online: https://elibrary.ru/contents.asp?titleid=8682

VI.Gel’fand I.M., and Yaglom A.M. (1948). Charge conjugation for general relativistic invariant wave equations. Journal of Experimental and Theoretical Physics (Журнал экспериментальной и теоретической физики), 18(12): 1105–1111 (in Russian). Available online: https://elibrary.ru/contents.asp?titleid=8682

VII.Kisel V.V., Pletyukhov V.A., Gilewsky V.V., OvsiyukE.M., Veko O.V., and Red’kov V.M. (2017). Spin 1/2 particle with two mass states. interaction with external fields. Nonlinear Phenomena in Complex Systems, 20(4): 404–423. Available online: http://www.j-npcs.org/abstracts/vol2017/v20no4/v20no4p404.html

VIII.Kisel V.V.,OvsiyukE.M., Veko O.V., VoynovaYa.A.,Balan V., Red’kovV.M. (2018). Elementary Particles with Internal Structure in External Fields. Vol I. General Theory. Nova Science Publishers, New York, USA. Available online: https://www.novapublishers.com/catalog/product_info.php?products_id=63898

IX.Kisel V.V., Ovsiyuk E.M., Veko O.V., Voynova Ya.A., Balan V., Red’kovV.M. (2018). Elementary Particles with Internal Structure in External Fields. Vol II. Physical Problems.Nova Science Publishers, New York, USA.Available online: https://www.novapublishers.com/catalog/product_info.php?products_id=63900

X.Pletjukhov V.A., Red’kov V.M., and Strazhev V.I. (2015). Relativistic wave equations and intrinsic degrees of freedom (Релятивистские волновые уравнения и внутренние степени свободы). Publishing House “Belarusian Science”, Minsk, Belarus (in Russian).Available online: http://www.belnauka.by/component/mtree/knizhnye/978-985-08-1886-7.html?Itemid=

XI.Red’kov V.M. (2009). Fields in Riemannian space and the Lorentz group (Поля частиц в римановом пространстве и группа Лоренца). Publishing House “Belarusian Science”, Minsk, Belarus (in Russian).Available online: http://www.belnauka.by/component/mtree/realizovannye/polya-chastits-v-rimanovom-prostranstve-i-gruppa-lorentsa.html?Itemid=

XII.Shimazu H. (1956). A relativistic wave equation for a particle with two mass states of spin 1 and 0. Progressof Theoretical Physics, 16(4): 287–298.Available online: https://academic.oup.com/ptp/article/16/4/287/1847199

View | Download

Abstract:

On the basis of Maxwell's field theory and the finite element method, a generalized mathematical model and its software implementation have been developed that make it possible to study the "anatomy" of electromagnetic devices with adjustable inductivity and to determine correlations between their structural and circuit features and differential and integral characteristics. The space-time distribution of the magnetic field in typical designs of controlled reactors with a pulsating and rotating field and their characteristics are determined, design solutions for devices optimization are adopted. The results for a three-phase saturable reactor are presented.

Keywords:

Saturating Reactor,Magnetic Field,Finite Element Method,Mathematical Model,

Refference:

I.Alexandrov G., (2002).Fast controllable reactor of transformer type 420 kV, 50 MVA commissioned in Electrichestvo, vol. 3.

II.Belyaev A., Evdokunin G.A., (2009) et al. Rationale for application of shunt compensation devices for transit transmission 500 kV in Electrichestvo, vol.2,

III.Bengtsson C., Gajic Z., Khorami M., (2012) Dynamic Compensation of Reactive Power by Variable Shunt Reactors: Control Strategies and Algorithms. Paper C1-303, CIGRE 2012.

IV.Bryantsev A., (2003) Power Reactors Controlled by Bias Magnetization –as an element of the electroenergy system in Russian Electrical Engineering, vol. 1.

V.Bryantsev A., Makletsova E.E. and others, (2003). Shunting Reactors Controlled By Bias Magnetization For (35-500)-Kv Grids in Russian Electrical Engineering, vol. 74, No 1, pp. 4-12.

VI.Dolgopolo A., (2014). Controlled shunt reactors. The principle of operation, construction, relay protection and automation. Energy, Moscow,120p.

VII.Dolgopolov A., Sokolov S.E., (2012) Controlled reactors. Technology review in Electrical Engineering News, vol. 75, No3.

VIII.Zabudsky E.I., (1999). Analysis of controlled electrical power devices by the finite element method, MGAU, Moscow, 141 p.

IX.Zabudsky E., (2015). Modeling and Analysis of Electromagnetic Modes of Electric Power Devices. In Information Technologies & Knowledge, Vol. 9, Number 1, ITHEA, Sofia (Bulgaria), pp.80-99.

X.Zabudsky E.I., ErmurakiYu.V., et al., (1992). Three-phase saturable reactor. Ac./1781711 USSR, 15.12.92, BI No 46.

XI.ZabudskyE.I., ErmurakiYu.V., et al., (1991). Three-phase static ferromagnetic frequency treasure. Ac./1663721 USSR, 15.07.91, BI No. 26.

View | Download

Abstract:

The article presents the results of analysis of pressure fluctuations in a pipe in which the maximum amplitude of the pressure decreases due to the introduction of pipeline sections with low speed of propagation of pressure waves.

Keywords:

hydraulic schemes,pressure fluctuations, the speed of sound,

Refference:

I.Ganiev R.F, Nizamov H.N, Derbukov E.I. (1996). Wave Stabilization and Prevention of Accidents in Pipe-Lines, Moscow: Izd-vo MGTU.

II.Korobkin A.A. (2013). A linearized model of water exit, J. Fluid Mechanics, Vol. 737, p. 733 –742.

III.Rekach F.V. (2010). An analysis of vibrations in circular cylindrical shells with pressure stabilizer by a method of characteristics. J. Structural Mechan-ics of Engineering Constructions and Buildings, 1,: 60-65.

IV.Rekach F.V., Shambina S.L. and Sinichenko E.K. (2017). Influence of pres-sure stabilizer perforation area on character of unsteady fluid motion in hy-draulic systems. International Journal of Mechanical Engineering and Robot-ics Research, 6 (4): 269-271.

V.Shterenliht D.V. (2004). Hydraulics. Moscow: KoloS.

VI.Young WR, WolfeC.L. (2014). Generation of surface waves by shear-flow instability. J. Fluid Mechanics, 739: 276 –307.

VII.ZhukovskyN.E. (1949). On Water Hammer in Water Pipes, M.-L.: Goste-hizdat.

View | Download

Abstract:

The adsorption of methyl violet was studied by flake chitosan (commercial grade) as an adsorbent. Batch studies were operated to test the effect of initial concentration on the adsorption of methyl violet. The adsorption isotherms were studied in range of 13.1 – 117.6 mg/L of methyl violet. It was found that the adsorption capacity was increased by increasing of adsorbate from 20.1 – 127.2 mg/g, respectively. Langmuir isotherm was found to fit for methyl violet adsorption onto flake chitosan. Operating line from Langmuir isotherm can be applied for industrial wastewater very well.

Keywords:

Adsorption,Methyl violet,Flake chitosan,Isotherm,

Refference:

I.Alkan M, Çelikçapa S, Demirbaş Ö, and Doğan M (2005) Removal of reactive blue 221 and acid blue 62 anionic dyes from aqueous solutions by sepiolite. Dyesand Pigments, 65(3): 251-259.

II.Geçgel U, Üner O, Gökara G, and Bayrak Y (2016). Adsorption of cationic dyes on activated carbon obtained from waste Elaeagnus stone. Adsorption Science & Technology, 34(9-10): 509-511.

III.Hameed BH (2009). Spent tea leaves: a new non-conventional and low-cost adsorbent for removal of basic dye from aqueous solutions. Journal of Hazardous Materials, 161(2-3):753-759.

IV.Ho YS, and McKay G (2000). Batch sorber design using equilibrium and contact time data for the removal of lead. Water, Air, and Soil Pollution, 124(1-2): 141–153.

V.Mall ID, Srivastava VC, and Agarwal NK (2007). Adsorption removal of Auramine-O: Kinetic and equilibrium study. Journal of Hazardous Materials, 143(1-2): 386-395.

VI.Mittal A, Mittal J, and Kurup L (2006). Batch and bulk removal of hazardous dye, indigo carmine from wastewater through adsorption. Journal of Hazardous Materials, 137(1): 591-602.

VII.Oladoja NA, and Akinlabi AK (2009). Congo red biosorption on palm kernel seed coat. Industrial & Engineering Chemistry Research, 48(13): 6188-6196.

VIII.Pillai CKS, Paul W, and Sharma CP (2009). Chitin and chitosan polymers: Chemistry, solubility and fiber formation. Progress in Polymer Science. 34(7): 641-678.

IX.Wan Ngaha WS, Teong LC, and Hanafiah MAKM (2011). Adsorption of dyes and heavy metal ions by chitosan composites: A review.Carbohydrate Polymers,83(4): 1446-1456.

X.Xu R, Xiao S, Yuan J, and Zhao A (2011). Adsorption of methyl violet from aqueous solutions by the biochars derived from crop residues. Bioresoruce Technology, 102(22): 10293-10298.

XI.Yang Y, Chun Y, Sheng G, and Huang M (2004). pH-dependence of pesticide adsorption by wheat-residue-derived black carbon. Langmuir, 20 (16): 6736-6741.

XII.Zhang J, Zhou Q, and Ou L (2012). Kinetic, isotherm, and thermodynamicstudies of the adsorption of methyl orange from aqueous solution bychitosan/alumina composite. Journal of Chemical &Engineering Data, 57(2):412-419.

View | Download

Abstract:

The paper considers one of the most difficult problems of determining the de-sign schemes for architectural designs. The analysis of existing methods of compiling calculation schemes is carried out depending on the composition of structural ele-ments, the material of the structure and its configuration. The criteria for the corre-spondence of the design scheme of the real structure and its elements are revealed. The results of the study make it possible to conclude that the criterion of conformity is introduced by the quantitative index for the mass of the structure and its elements. It is proposed to introduce the mass of the structure or its elements as the main set pa-rameter for determining the calculation system in the stretching or compression zone.

Keywords:

Calculation Schemes,Structural Elements,Mass Of The Structure,Ten-sions,

Refference:

I.Baker J.F. (1956). The Steel Skeleton. Cambridge University Press. London, 1, 2 (206).

II.Cowan H.J. (1975). Architectural Structures. American Elsevier. N.Y.

III.Euler Leonhard.(1741). A conjecture on the forms of the roots of equations. New demonstrationsabout the resolution of numbers into squares. Methodu-sinveniendilineascurvasmaximiminimiveproprietategaudentes, sivesolutio-problematisisoperimetricilattissimosensuaccepti.

IV.Giedion S. (1967). Space, Time and Architecture. Harvard University Press. Cambridge.

V.KharunMakhmud, Svintsov Alexander P. (2017) Reliability of technological systems of building construction in permanent EPS formwork. International Journal of Advanced and Applied Sciences, 4(11): 94-98. (https://doi.org/10.21833/ijaas.2017.011.014)

VI.Kirchhof G.T. (1883). Vorlesungenuber die mathematischePhysik. G. Teubn-er. Leipzig.

VII.Krivoshapko S.N. and G.L. GbaguidiAïssè. (2016) Geometry, static, vibra-tion and buckling analysis and applications to thin elliptic paraboloid shells. The Open Construction and Building Technology Journal, 10: 576-602. (DOI: 10.2174/1874836801610010576).

VIII.Krivoshapko S.N. (2017). Thin sheet metal suspended roof structures. Thin-WalledStructures, 119: 629-634. (http://dx.doi.org/10.1016/j.tws.2017.07.014).

IX.Kpanzberg M. and Pursell C.W. (1967). Technology in Western Civilization. Oxford University Press. N.Y., Vol.1.

X.Le Corbusier. (1970). Towards a New Architecture. Architectural Press. London.

XI.Morley Arthur. (1934). Strength of Materials. Longmans. London.

XII.Newton Isaac. (1642).PhilosophiæNaturalis Principia Mathematica.

XIII.Otto F. (1967). Tensile Structure. V. 2 Cables, Nets and Membranes. M.I.T. Press. Cambridge.

XIV.Pannell J.P.M. (1964). Ann Illustrated History of Civil Engineering. Thames and Hudson. London.

XV.Timoshenko S.P. (1953). History of Strength of Materials. McGraw-Hill, N.Y.

XVI.Sanderson R.L. (1969). Codes and Code Administration. Chicago.

XVII.Shambina S.L. (2014). History of Structural Mechanics and Outstanding Scientist in Mechanics. RUDN, Moscow.(In Russian).

XVIII.Shambina S.L., Rekach F.V., Belousov Y.V. (2017). On new modifications of some strength criteria for anisotropic materials. Key Engineering Materials (724): 53-57.

 

View | Download

Abstract:

The thermal data of onset temperature, peak temperature and enthalpy of reaction of hydrogen peroxide at 35% w/w was tested by differential scanning calorimetry. The increasing of heating rate in the range of 2-8 °C/min increases the onset temperature from 76.9-84.0 °C, respectively. The activation energy of hydrogen peroxide was 57.6kJ/mol. The adiabatic decomposition temperature rise and time-to-maximum rate were 231.7 K and 32.3 sec, respectively. The thermal hazard potentials were estimated by the critical half thickness, the critical temperature and the time-to-thermal-runaway. The result confirmed that hydrogen peroxide is highly oxidizing hazardous material. Thus using in laboratory and industry must be act carefully.

Keywords:

Risk assessment,Thermal hazard potential,Hydrogen peroxide, DSC,

Refference:

I.ASTM (2011). ASTM E698-11, Standard test method for Arrhenius kinetic constants for thermally unstable materials using differential scanning calorimetry and the Flynn/Wall/Ozawa method. American Section of the International Association for Testing Materials, West Conshohocken.

II.ASTM (2015). ASTM E1445-08(Reapproved 2015),Standardterminology relating to hazard potential of chemicals.American Section of the International Association for Testing Materials, West Conshohocken.

III.ASTM (2016). ASTM E1231-15, Standard practice for calculation of hazardous potential figures of merit for thermally unstable materials. American Section of the International Association for Testing Materials, West Conshohocken. IV.Boelhouwer E., Davis J., Franco-Watkins A., Dorris N., and

V.Lungu C. (2013). Comprehension of hazard communication: Effects of pictograms on safety data sheets and labels. Journal of Safety Research, 46: 145-155.

VI.Bou-Diab L., and Fierz H. (2002). Autocatalytic decomposition reactions, hazards and detection. Journal of Hazardous Materials, 93: 137-146.

VII.Chen KY., Lin CM., Shu CM., and Kao CS. (2006). An evaluation on thermokinetic parameters for hydrogen peroxide at various concentrations by dsc. Journal of Thermal Analysis and Calorimetry, 85: 87-89.

VIII.Chi JH., Wu SH., Charpentier JC., I YP., and Shu CM. (2012). Thermal hazard accident investigation of hydrogen peroxide mixing with propanone emyloying calorimetric approaches. Journal of Loss Prevention in the Process Industries, 25: 142-147.

IX.Eissen M., Zogg A., and Hungerbühler. (2003). The runaway scenario in the assessment of thermal safety: simple experimental access by means of the catalytic decomposition of H2O2. Journal of Loss Preventionin the Process Industries, 16: 289-296.

X.Gibson N., Rogers RL., and Wright TK. (1987). Chemical reaction hazards: an integrated approach, hazards from pressure. Institution of Chemical Engineers Symposium Series, 102: 61-84.

XI.Liu SH., Shu CM., and Hou HY. (2015). Applications of thermal hazard analyses on process safety assessments. Journal of Loss Prevention in the Process Industries, 33: 59-69.

XII.Na Z., and Xinming Q. (2012). International symposium on safety science and technology influence of organic acidon thermal hazard of hydrogen peroxide. Procedia Engineering, 45: 526–532.

XIII.Saraf SR, Rogers WJ, Mannan MS. (2003). Prediction of reactive hazards based on molecular structure. Journal of Hazardous Materials, 98: 15–19.

XIV.Sivapirakasam SP., Mohamed MN., Surianarayanan M., and Sridhar V. (2013). Evaluation of thermal hazards and thermo-kinetic parameters of a matchhead composition by DSC and ARC. Thermochimica Acta, 557: 13–19.

XV.Sivapirakasam SP., Surianarayanan M., Chandrasekaran F., and Swaminathan G. (2004).Thermal hazards of cracker mixture using DSC. Journal of Thermal Analysis and Calorimetry, 78: 799-808.

XVI.Tseng CP., and Lin CP. (2011). Green thermal analysis technology for evaluating the thermal hazard of di-tert-butyl peroxide. Industrial & EngineeringChemistry Research, 50: 9487-9494.

XVII.Wu SH., Chi, JH., Huang CC., Lin NK., Peng JJ., and Shu CM. (2010). Thermal hazard analyses and incompatible reaction evaluation of hydrogen peroxide by DSC. Journal of Thermal Analysis and Calorimetry, 102: 563-568.

View | Download

Abstract:

The objective of this work is aimed to study the roofing tiles product manufactured from natural fibers residues. The natural fibers residues in this work are kenaf fiber, corn cob fiber and palm fruit bunch fiber. Urea formaldehyde resin adhesive was selected as the binder. The properties of study were physical based on JIS A 5908-2003, mechanical based on TIS 535-2540 and ASTM D 256-2006a, thermal conductivity based on ASTM C 117-2010 and SEM technique was used to investigate the microstructural characteristics. Consequently, this work shows a compared to the properties of commercial roofing tiles in Thailand. The study results revealed that physical, mechanical, thermal conductivity and microstructural characteristics of the roofing tiles product are accordance with the standard test requirements. Finally, it was found that the roofing tiles product properties manufactured from natural fiber residues in this work are similar to commercial roofing tiles in Thailand.

Keywords:

Roofing Tiles,Natural Fiber Residues, Roofing Tiles Properties, SEM Technique,

Refference:

I.Andrzej K,Bledzki, Hans-PeterF, MohiniS. and Omar F. (2012). Bio composites reinforced with natural fiber : 2000-2010. Progress in Polymer Science. Vol.45, Chapter 1.

II.Antich P,Vazquez A, Mondragon I, and BernalC. (2006). Mechanical behavior of high impact polystyrene reinforced with short sisal fibers. Composites part A: Applied Science and Manufacturing. Vol. 37, pp. 139-50.

III.American Society for Testing and Material. (2010). Standard Test Method for Steady-State Heat FluxMeasurements and Thermal Transmission Properties by Means of the Guarded-Host-Plate Apparatus. in Annual Book of ASTM Standards, Vol. 04, Baltimore, Philadelphia.

IV.Arkom Pasilo and Umphisak Teeboonma. (2007). Effect of binder on particle board properties manufactured from straw rice and rick husk. in the 21stConference of Mechanical Engineering Network of Thailand (ME-NETT), Chonburi, Thailand.

V.Arkom Pasilo and Umphisak Teeboonma. (2015).

VI.Development of roofing tiles manufactured from.

VIII.agricultural residues. in the 11stConference on Energy.

IX.Network of Thailand (E-NETT), Chonburi, Thailand.

X.Arkom Pasilo and Umphisak Teeboonma.(2016). Investigation of the properties of roofing tiles manufactured from agricultural residues”, International Conference on Advanced Material Science and Mechanical Engineering, AMSME 2016, March 20-21, Bangkok,Thailand.

XI.Bettini SHP.(2010). Investigation on the use of coir fiber as alternative reinforcement in polypropylence. Journal of Applied Polymer Science.Vol. 118, pp.2841-8.

XII.Brahmakumar M,Pavithran C, and Pillai RM. (2005). Coconut fiber reinforced polyethylene composites: effect of natural waxy surface layer of the fiber on fibers/matrix interfacial bounding and strength of composites. Composites Science and Technology.Vol.65, pp. 563-9.

XIII.Chasemi I,Azizi H, Naeimian N. (2009). Investigation of the dynamic mechanics behaviour of polypropylene/(wood flour)/(kenaf fiber) hybrid composites” Journal of Vinyl and Additive Technology.Vol. 15 , pp. 113-9.

XIV.Eichhorn SJ. and Young RJ.(2004). Composite micromechanics of hemp fibers and epoxy resin microdroplets. Composites Science and Technology.Vol 64, pp. 767-72.

XV.Hassan A,Salema AA, and Ani FH.(2010). A review on oil palm emtry fruitbunchfiber-reinforced polymer composite materials, Polymer composites. Vol. 31 , pp. 2079-101.

View | Download

Abstract:

This paper presents an experimental thermal performance of flat plate solar air heater with and without porous material. The steel wool was selected as porous materials for this work. The solar radiations was simulated by halogen lights and dimmers and variac were used for regulating intensity. The couple of solar air heaters were constructed for with and without porous material. The experiments were conducted on both of solar air heaters at same location, simultaneously. The experiments were carried out the following conditions: solar radiation of 400, 600 and 800 W/m2, air mass flow rate of 0.01, 0.015 and 0.02 kg/s and porous material which having porosity of 0.92 and 0.94. The criteria to comparatively study of the thermal efficiency of solar air heater with and without porous material. The experimental results revealed that temperature difference between inlet and outlet of solar air heater increased with increment of solar radiation. Furthermore, the thermal efficiency of solar air heater having porous material was higher than solar air heater without porous material. Thermal efficiency of solar air heater was increased with air mass flow rate increased. In addition, the thermal efficiency will be enhanced because of increasing of heat transfer area due to porous material.

Keywords:

Solar Air Heater,Thermal Efficiency,Porous Material,Experimental,

Refference:

I.Alvarez G., Arce J., Lira L. and Heras M.R., (2004). Thermal performance of an air solar collector with an absorber plate made of recyclable aluminum cans. Solar Energy. 77:107-113.II.Akpinar E.K. and Kocyigit F., (2010). Experimental investigation of thermal performance of solar air heater having different obstacles on absorber plates. International Communications in Heat and Mass Transfer, 37:416-421.III.Amer B.M.A., Hossain M.A. and Gottschalk, K., (2010). Design and performance evaluation of a new hybrid solar dryer for banana. Energy Conservation and Management, 57:813-820.

IV.Duffie A.J. and Beckman W.A. (1991) Solar Engineering and Thermal Process. (2nded), John Wiley & Sons, New York.

V.El-Sebaii A.A., Aboul-Enrin S., Ramadam M.R.I., El-Baily E.,(2007). Year round performance of double pass solar air heater with packed bed. Energy Conversion and Management, 48:990-1003.

VI.Esen H., (2008). Experimental energy and exergy analysis of a double-flow solar air heater having different obstacles on absorper plates. Building and Environment, 43:1046-1054.

VII.Gill R.S. Singh, S. Singh P.P., (2010). Low cost solar air heater. Energy Conservation and Management, 57: 131-142.

VIII.Kolb A., Winter E.R.F., and Viskanta R., (1999). Experimental studies on a solar air collector with metal matrix absorper, Solar Energy, 65(2):91–98.

IX.Mohamad A. A., (1997). High efficiency solar airheater, Solar Energy, 60(2):71-76.

X.Moummi N. Ali, S.Y. Moummi, A. Desmons, J.Y., (2004). Energy analysis of a solar air collector with rows of fins. Renewable Energy, 29(13): 2053-2064.

XI.Ozgen F. Esen, M. Esen H., (2009). Experimental investigation of thermal performance of a double-flow solar air heater having aluminium cans. Renewable Energy, 34(11):2391-2398.

XII.Ramani B.M., Gupta A., Kumar R.,(2010). Performance of a double pass solar air collector. Solar Energy, 84:1929-1937.

XIII.Saravanakumar and Mayilsamy K., (2010). Forced convection flat plate solar air heaters with and without thermal storage. Journal of Scientific & Industrial Research, 69:966–968.

XIV.Sopian K. A., M.A. Ebrahim M. A., M.Y. Sulaiman and Musa E.A., (1999). Thermal performance of the double-pass solar collector with and without porous media. Renewable Energy, 18:557-564.

XV.SreekumarA., (2010).Techno-economic analysis of a roof-integrated solar air heating system for drying fruit and vegetable. Energy Conservation and Management,57:131-142.

XVI.Yousef B.A.A. and Adam, N.M., (2008).Performance analysis for flat plate collector with and without porous media. Journal of Energy in Southern Africa, 19(4):32–42.

XVII.Zheng W., Zhang H., You Y., Zheng X.,(2017). Thermal performance analysis of a metal corrugated packing solar air collector in cold regions. Applied Energy, 203:938-947.

View | Download

Abstract:

The trend of overweight and obesity cases in developing countries in recent years have been particularly alarming as the cases are consistently on the rise. Improving the economy rate has resulted to the increasing number of overweight and obesity cases among adults and children in a family. Overweight and obesity have commonly been known to associate with eating habits and this belief is assimilated into the people for many years. However, recent studies suggest that the factors to the issue are extended to the convenience and comfort that modern technologies have provided which affects our lifestyle due to passive mobility. Therefore, it is important that the awareness of practicing healthy lifestyle is incorporated in young children. Although there are efforts towards this campaign such as organizing physical activities in school as a part of the curriculum, it is insufficient to burn enough calories. Thus, Healthy Routes to School (HTRS) concept is introduced as a strategy to cope with this issue by encouraging childhood walking so its positive effects on health can be benefited. The use of Geographic Information System (GIS) in this research is to monitor the distance and BMI classification, and to calculate the appropriate time taken for each mobility mode. The results were classified into four categories which are walking, public transport, parent vehicle, and cycling. Children that use parent vehicle and public transport contributed to 82.35% of overweight and obesity class while 17.65% were normal and underweight. In order to promote the HRTS concept, the distance and time taken were calculated to determine the most suitable and comfortable distance for walking and cycling to school.

Keywords:

Obesity,Healthy,Route to School,GIS,

Refference:

I.Bong, ASL. & Safurah, J. (1996). Obesity among year 1 and 6 Primary School Children in Selangor Darul Ehsan. Malaysian Journal of Nutrition 2; 21-27.

II.Ismail MN & Tan CL (1998). Prevalence of obesity in Malaysia. Country Report at the Regional Advisory Meeting on Obesity. August 1998. Manila, Philippines.

III.Ismail MN & Vicknewary EN (1999). Prevalence of obesity in Malaysia: Data from three ethnic groups. Country report at the Asian BMI/Obesity Workshop. June 1999. Milan, Italy.

IV.Razalee Sedek, Poh Bee Koon and Ismail Mohd Noor (2010). Body Mass Index and Body Composition among Royal Malaysian Navy (RMN) Personnel, Journal of Defence and Security, Vol.1, No 1: 2010.

V.Robert Wood (2009), Active Transportation: Making the Link from Transportation to Physical Activity and Obesity. Active Living Research, San Diego State University.

VI.Subramaniam (2015),the National Health and Morbidity Survey,Ministry of Health Malaysia,retrieved fromhttp://www.themalaymailonline.com/malaysia.

VII.Tracy E. McMillan, “The Influence of Urban Form on a Child‟s Trip to School,” paper presented at the Association of Collegiate Schools of Planning Annual Conference, Baltimore, 2002.

VIII.Wang Y and Lobstein T (2006).Worldwide trends in childhood overweight and obesity. Int.J PediatricObese, 1(1), 11-25. WHO. Obesity: preventing and managing the global epidemic. Report of a WHO Consultation. WHO Technical Report Series 894. Geneva: World Health Organization, 2000. 268

IX.WHO/IASO/IOTF. The Asia-Pacific perspective: redefining obesity and its treatment. Health Communications Australia: Melbourne, 2000.

X.Xingyou Zhang (2006), Identification of Contrastive and Comparable School Neighborhoods for Childhood Obesity and Physical Activity Research, International Journal of Health Geographics 5:1 doi:10.1186/1476-072X-5-14, pg 1-9.

View | Download

Abstract:

Shah Alam is one of the regions which has a dense population and high level of urbanization in Malaysia. The study assumed high urbanization leads to the increase of temperature. The aim is to study the trend and relationship between Land Surface Temperature (LST) with built-up areas and Normalized Difference Vegetation Index (NDVI) in three different years (1997, 2007, 2017) in Shah Alam, Selangor. This study used Geographical Information System (GIS) and Remote Sensing software to process satellite imagery data (Landsat 5 TM, 7 ETM+, 8 OLI). Built-up area was processed using Principal Component Analysis (PCA) from Landsat 8 (OLI) while the land use land cover was processed using Supervised Classification method. The results were analyzed using linear regression analysis in the Statistical Package of the Social Science (SPSS) to describe the relationship of the LST with built-up area and NDVI. The highest LST distribution of 35.717ºC is recorded in 2017. This indicates that built-up area gives more impact to the increase of LST in Shah Alam despite NDVI having the highest correlation relationship as shown by the values of R² which are 0.557, 0.533, and 0.585 for year 1997, 2007, and 2017 respectively. This paper focused on the changes of land use land cover for built-up area (i.e. residential and industrial area) which have increased from year 1997 to 2017. In year 1997, the percentage of built-up area is 36.69% and it has increased to 44.36% in year 2017. The study can conclude that urban built-up is one of the major factors in the increasing LST.

Keywords:

Built-up, LST,and use land cover,Linear regression ,

Refference:

I.S. A. A. I.Ibrahim, R. Fauzi and N. M. Noor. (2016).”The Land Surface Temperature Impact To Land Cover Types,” The International Achieves of the Photogrammetry, Remote Sensing and Spatial Information Sciences, pp. 871-876. II.Shaharuddin, M. H. Noorazuan, W. Takeuchi and A. Noraziah. (2014). “The Effects of Urban Heat Islands on Human Comfort : A case of Klang Valley Malaysia,” Global Journal on Advances in Pure & Applied Science, pp. 1-8.

III.S. Ahmad, N. M. Hashim, Y. M. Jani, K. Aiyub and M. F. Mahmod. (2010). “The Effects of Different Land Uses on Temperature Distribution in Urban Areas,” in SEAGA, Hanoi.

IV.S. Elsayed. (2012). “Mitigation of the Urban Heat Island of the City of Kuala Lumpu, Malaysia,” Middle-East Journal of Scientific Research , pp. 1602-1613.

V.Dasimah and BO. (2009)., “Urban Form and Sustainability of Hot Humid City of Kuala Lumpur,” European Journal of Social Sciences, pp. 353-359.

VI.S. J. Brian. (2001). Remote Sensing Analysis of Residential Land Use, Forest Canopy Distribution and Surface Heat Island Formation in Atlanta Metropolitan Region, Georgia, Atlanta: Georgia Institute of Technology.

VII.S. A. Salleh, Z. A. Latif, W. M. Mohd and A. Chan. (2013). “Factors Contributing to the Formation of an Urban Heat Island in Putrajaya, Malaysia,” Procedia Social and Behavioral Sciences, pp. 840-850.

VIII.W. Y. Wan Ibrahim, A. Long and A. S. Permana. (2013). “Green Spaces Audits on its Accessibility in Pasir Gudang,” Planning Malaysia Geospatial Analysis in Urban Planning, vol. II, pp. 39-56.

IX.N. M. Jamaludin, N. Izma, M. F. Khamid and S. N. Wahab. (2015). “Thermal Comfort Residential Building in Malaysia at Different Micro-Climates,” Procedia Social Behavioral Sciences, pp. 613-623.

X.J. A. Richards. (2013). Remote Sensing Digital Image Analysis, New York: Springer-Verlag.

XI.K. C. Tan, H. S. Lim, M. Z. MatJafri and K. Abdullah,. (2010). “Landsat Data to Evaluate Urban Expansion and Determine Land Use / Land Cover Changes in Penang Island, Malaysia,” Environ Earth Sci, pp. 1509-1521.

XII.S. S. Bhatti and N. K. Tripathi. (2014). “Built-up Area Extraction using Landsat,” GIScience & Remote Sensing, pp. 445-467.

XIII.N. A. Isa, W. N. Wan Mohd and S. A. Salleh. (2017). “The Effects of Built-up and Green Areas on the Land Surface Temperature of the Kuala Lumpur City,” The International Archieves of the Photogrammetry, Remote Sensing and Spatial Information Sciences, vol.XLII, pp. 107-112.

View | Download

Abstract:

Web services are deployed using eXtensible Markup Language (XML), which is an independent language for easy transportation and storage. As an important transportation for data, Web services has become increasingly vulnerable to malicious attacks that could affect essential properties of information systems such as confidentiality, integrity, or availability. Like any other application that allows outside user submission data, Web services can be susceptible to code injection attacks, specifically XPath (XML Path Language) injection attacks. This kind of attack can cause serious damage to the database at the backend of Web services as well as the data within it. To cope with this attack, it is necessary to develop effective and efficient secure mechanism from various angles, outsider and insider. This paper addresses both outsider and insider threats with respect to XPath injections in providing secure mechanism for XML database-centric Web services. We propose the two level security approaches for the ultimate solution within XML database-centric Web services. The first approach focuses on preventing malicious XPath input within Web services application. In order to address issues of XPath injections, we propose a model-based validation (XIPS) for XPath injection attack prevention in Web service applications. The second approach focuses on preventing insider threat within XML database. In order to deal with insider threat, we propose a severity-aware trust-based access control model (XTrust) for malicious XPath code in XML database.

Keywords:

Web Services,Web Services,Blind Xpath Injection,Model-Based,Hotspot,

Refference:

I.A. Klein, Blind XPath Injection. (2005). Whitepaper from Watchfire, Director of Security and Research, Sanctum, (2004) 1–10.

II.J. Blasco, Introduction to XPath Injection techniques,(2007),24–31.

III.Jinghua Groppe,Sven Groppe,Filtering unsatisfiable XPath queries”, Journal Data & Knowledge Engineering , Vol.64 No. 1,Amsterdam, (2008)134-169.

IV.D. Mitropoulos,Fortifying Applications Against Xpath Injection Attacks, (2009), 1169–1179.

V.N. Antunes, N. Laranjeiro, M. Vieira, & H. Madeira,Effective detection of SQL/XPath Injection vulnerabilities in web services. SCC 2009 -2009 IEEE International Conference on Services Computing, (2009), 260–267. http://doi.org/10.1109/SCC.2009.23

VI.Shanmughaneethi, Ravichandran, & Swamynathan,PXpathV: Preventing XPath Injection Vulnerabilities in Web Applications. International Journal on Web Service Computing, 2(3), (2011), 57–64. http://doi.org/10.5121/ijwsc.2011.2305

VII.S. Karumanchi, & A. Squicciarini, A Large Scale Study of Web Service Vulnerabilities.Journal of Internet Services and Information Security (JISIS),5(1), (2015), 53-69.

View | Download