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  Subjects -> ENGINEERING (Total: 1957 journals)
    - CHEMICAL ENGINEERING (150 journals)
    - CIVIL ENGINEERING (146 journals)
    - ELECTRICAL ENGINEERING (84 journals)
    - ENGINEERING (1124 journals)
    - ENGINEERING MECHANICS AND MATERIALS (284 journals)
    - HYDRAULIC ENGINEERING (43 journals)
    - INDUSTRIAL ENGINEERING (53 journals)
    - MECHANICAL ENGINEERING (73 journals)

ENGINEERING (1124 journals)            First | 2 3 4 5 6 7 8 9 | Last

International Journal of Innovation Science     Full-text available via subscription   (5 followers)
International Journal of Integrated Engineering     Open Access   (1 follower)
International Journal of Intelligent Engineering Informatics     Hybrid Journal  
International Journal of Intelligent Systems and Applications in Engineering     Open Access   (1 follower)
International Journal of Lifecycle Performance Engineering     Hybrid Journal  
International Journal of Machine Tools and Manufacture     Hybrid Journal   (4 followers)
International Journal of Manufacturing Research     Hybrid Journal   (7 followers)
International Journal of Manufacturing Technology and Management     Hybrid Journal   (10 followers)
International Journal of Materials and Product Technology     Hybrid Journal   (4 followers)
International Journal of Mathematical Education in Science and Technology     Hybrid Journal   (6 followers)
International Journal of Mathematics in Operational Research     Hybrid Journal   (1 follower)
International Journal of Medical Engineering and Informatics     Hybrid Journal   (5 followers)
International Journal of Micro Air Vehicles     Full-text available via subscription   (2 followers)
International Journal of Microwave and Wireless Technologies     Hybrid Journal   (1 follower)
International Journal of Microwave Science and Technology     Open Access   (3 followers)
International Journal of Mobile Network Design and Innovation     Hybrid Journal   (3 followers)
International Journal of Multiphase Flow     Hybrid Journal   (2 followers)
International Journal of Nanomanufacturing     Hybrid Journal   (1 follower)
International Journal of Nanoscience     Hybrid Journal   (1 follower)
International Journal of Nanotechnology     Hybrid Journal   (4 followers)
International Journal of Navigation and Observation     Open Access   (4 followers)
International Journal of Network Management     Hybrid Journal  
International Journal of Nonlinear Sciences and Numerical Simulation     Full-text available via subscription   (1 follower)
International Journal of Numerical Methods for Heat & Fluid Flow     Hybrid Journal   (6 followers)
International Journal of Optics     Open Access   (1 follower)
International Journal of Organisational Design and Engineering     Hybrid Journal   (7 followers)
International Journal of Pattern Recognition and Artificial Intelligence     Hybrid Journal   (6 followers)
International Journal of Pavement Engineering     Hybrid Journal   (2 followers)
International Journal of Physical Modelling in Geotechnics     Hybrid Journal   (2 followers)
International Journal of Plasticity     Hybrid Journal   (6 followers)
International Journal of Plastics Technology     Hybrid Journal  
International Journal of Polymer Analysis and Characterization     Hybrid Journal   (2 followers)
International Journal of Polymer Science     Open Access   (15 followers)
International Journal of Precision Engineering and Manufacturing     Hybrid Journal   (8 followers)
International Journal of Precision Technology     Hybrid Journal  
International Journal of Pressure Vessels and Piping     Hybrid Journal   (2 followers)
International Journal of Production Economics     Hybrid Journal   (10 followers)
International Journal of Quality and Innovation     Hybrid Journal   (2 followers)
International Journal of Quality Engineering and Technology     Hybrid Journal   (2 followers)
International Journal of Quantum Information     Hybrid Journal  
International Journal of Rapid Manufacturing     Hybrid Journal   (4 followers)
International Journal of Reliability, Quality and Safety Engineering     Hybrid Journal   (4 followers)
International Journal of Renewable Energy Technology     Hybrid Journal   (7 followers)
International Journal of Robust and Nonlinear Control     Hybrid Journal   (2 followers)
International Journal of Science Engineering and Advance Technology     Open Access  
International Journal of Sediment Research     Full-text available via subscription   (1 follower)
International Journal of Self-Propagating High-Temperature Synthesis     Hybrid Journal   (2 followers)
International Journal of Signal and Imaging Systems Engineering     Hybrid Journal  
International Journal of Six Sigma and Competitive Advantage     Hybrid Journal  
International Journal of Social Robotics     Hybrid Journal   (1 follower)
International Journal of Software Engineering and Knowledge Engineering     Hybrid Journal   (1 follower)
International Journal of Space Science and Engineering     Hybrid Journal   (2 followers)
International Journal of Speech Technology     Hybrid Journal   (2 followers)
International Journal of Spray and Combustion Dynamics     Full-text available via subscription   (5 followers)
International Journal of Surface Engineering and Interdisciplinary Materials Science     Full-text available via subscription   (1 follower)
International Journal of Surface Science and Engineering     Hybrid Journal   (7 followers)
International Journal of Sustainable Engineering     Hybrid Journal   (7 followers)
International Journal of Sustainable Manufacturing     Hybrid Journal   (4 followers)
International Journal of Systems Assurance Engineering and Management     Hybrid Journal  
International Journal of Systems, Control and Communications     Hybrid Journal   (2 followers)
International Journal of Technology Management and Sustainable Development     Hybrid Journal   (1 follower)
International Journal of Technology Policy and Law     Hybrid Journal   (3 followers)
International Journal of Telemedicine and Applications     Open Access   (2 followers)
International Journal of Thermal Sciences     Hybrid Journal   (4 followers)
International Journal of Thermodynamics     Open Access   (1 follower)
International Journal of Turbo & Jet-Engines     Full-text available via subscription  
International Journal of Ultra Wideband Communications and Systems     Hybrid Journal  
International Journal of Vehicle Autonomous Systems     Hybrid Journal  
International Journal of Vehicle Design     Hybrid Journal   (5 followers)
International Journal of Vehicle Information and Communication Systems     Hybrid Journal   (1 follower)
International Journal of Vehicle Noise and Vibration     Hybrid Journal   (2 followers)
International Journal of Vehicle Safety     Hybrid Journal   (3 followers)
International Journal of Vehicular Technology     Open Access   (1 follower)
International Journal of Virtual Technology and Multimedia     Hybrid Journal   (4 followers)
International Journal of Wavelets, Multiresolution and Information Processing     Hybrid Journal  
International Journal on Artificial Intelligence Tools     Hybrid Journal   (4 followers)
International Nano Letters     Open Access   (5 followers)
International Review of Applied Sciences and Engineering     Full-text available via subscription  
Inverse Problems in Science and Engineering     Hybrid Journal   (3 followers)
Ionics     Hybrid Journal  
IPTEK The Journal for Technology and Science     Open Access  
IRBM News     Full-text available via subscription  
Ironmaking & Steelmaking     Hybrid Journal   (2 followers)
Irrigation and Drainage Systems     Hybrid Journal  
ISA Transactions     Full-text available via subscription  
ISRN Communications and Networking     Open Access   (4 followers)
ISRN Nanotechnology     Open Access  
ISRN Signal Processing     Open Access  
ISRN Thermodynamics     Open Access  
ISRN Tribology     Open Access  
IT Professional     Full-text available via subscription   (1 follower)
Journal of Biosensors & Bioelectronics     Open Access   (1 follower)
Journal of Advanced Manufacturing Systems     Hybrid Journal   (8 followers)
Journal of Aerosol Science     Hybrid Journal   (2 followers)
Journal of Aerospace Engineering     Full-text available via subscription   (77 followers)
Journal of Alloys and Compounds     Hybrid Journal   (6 followers)
Journal of Analytical and Applied Pyrolysis     Hybrid Journal   (3 followers)
Journal of Analytical Science & Technology     Open Access   (4 followers)
Journal of Analytical Sciences, Methods and Instrumentation     Open Access   (1 follower)
Journal of Applied Analysis     Full-text available via subscription  

  First | 2 3 4 5 6 7 8 9 | Last

Journal of Electronic Imaging    [4 followers]  Follow    
  Partially Free Journal Partially Free Journal
     ISSN (Print) 1017-9909 - ISSN (Online) 1560-229X
     Published by SPIE - International Society for Optical Engineering Homepage  [7 journals]
  • Geomagnetic effect of launches and flights of large spacecraft
    • Abstract: Abstract The results of observations of variations in the geomagnetic field that accompanied launches and flights of rockets of different types have been analyzed. The launches were performed in 2002–2010 from different space launch facilities of the world (237 events in total), and variations in the range of periods 1–1000 s were studied. Measurements were performed near the city of Kharkov (distance from the spaceports ranges from 1500 to 9500 km). Statistical analysis and spectral estimations have been made, and three groups of disturbances were revealed. Time delays and disturbance durations increased with increasing distance from spaceports. Typical periods were equal to 6 to 14 min, while amplitudes varied in the range 1–3 nT.
      PubDate: 2013-11-01
       
  • Symmetric periodic solutions of the Hill’s problem. II
    • Abstract: Abstract An algorithm for studying the families of symmetric periodic orbits using their generating solutions, whose structure was presented in the first part of this paper [1], is described. The algorithm is essentially based on symmetry of the generating solution and on its initial approximation. More than 20 new families of symmetric periodic solutions of the Hill’s problem have been found and investigated with the use of this algorithm. The families including trajectories for orbital injection into the vicinity of collinear libration points L 1,2 are described.
      PubDate: 2013-11-01
       
  • Space experiments aboard the        class="a-plus-plus">Lomonosov MSU satellite
    • Abstract: Abstract At present, the Institute of Nuclear Physics of Moscow State University, in cooperation with other organizations, is preparing space experiments onboard the Lomonosov satellite. The main goal of this mission is to study extreme astrophysical phenomena such as cosmic gamma-ray bursts and ultra-high-energy cosmic rays. These phenomena are associated with the processes occurring in the early universe in very distant astrophysical objects, therefore, they can provide information on the first stages of the evolution of the universe. This paper considers the main characteristics of the scientific equipment aboard the Lomonosov satellite.
      PubDate: 2013-11-01
       
  • One-axis attitude of arbitrary satellite using magnetorquers only
    • Abstract: Abstarct An active magnetic control synthesis for attitude guidance of “Chibis-M” microsatellite is considered. The only information required is the data from the sun sensor. Applicability of a control to achieve solar panels sun-pointing is studied. Equations of motions are analytically solved using averaging technique. The behavior of a system with respect to initial conditions and orbit parameters is studied.
      PubDate: 2013-11-01
       
  • A robust guidance algorithm for the moon landing
    • Abstract: Abstract The paper deals with a choice of the rational trajectory of motion of a landing module designed for the Moon landing, from the moment of its de-orbiting from the near-lunar orbit up to landing. An integrated conceptual basis is used to develop multistep terminal algorithms for guidance for the three segments of the descent.
      PubDate: 2013-11-01
       
  • Modeling the time behavior of the        class="a-plus-plus">D        class="a-plus-plus">        class="a-plus-plus">st index during
           the main phase of magnetic storms generated by various types of solar wind
           
    • Abstract: Abstract Results of modeling the time behavior of the D st index at the main phase of 93 geomagnetic storms (−250 < D st ≤ −50 nT) caused by different types of solar wind (SW) streams: magnetic clouds (MC, 10 storms), corotating interaction regions (CIR, 31 storms), the compression region before interplanetary coronal ejections (Sheath before ICME, 21 storms), and “pistons” (Ejecta, 31 storms) are presented. The “Catalog of Large-Scale Solar Wind Phenomena during 1976–2000” (ftp://ftp.iki.rssi.ru/pub/omni/) created on the basis of the OMNI database was the initial data for the analysis. The main phase of magnetic storms is approximated by a linear dependence on the main parameters of the solar wind: integral electric field sumEy, dynamic pressure P d , and fluctuation level sB in IMF. For all types of SW, the main phase of magnetic storms is better modeled by individual values of the approximation coefficients: the correlation coefficient is high and the standard deviation between the modeled and measured values of D st is low. The accuracy of the model in question is higher for storms from MC and is lower by a factor of ∼2 for the storms from other types of SW. The version of the model with the approximation coefficients averaged over SW type describes worse variations of the measured D st index: the correlation coefficient is the lowest for the storms caused by MC and the highest for the Sheath- and CIR-induced storms. The model accuracy is the highest for the storms caused by Ejecta and, for the storms caused by Sheath, is a factor of ∼1.42 lower. Addition of corrections for the prehistory of the development of the beginning of the main phase of the magnetic storm improves modeling parameters for all types of interplanetary sources of storms: the correlation coefficient varies within the range from r = 0.81 for the storms caused by Ejecta to r = 0.85 for the storms caused by Sheath. The highest accuracy is for the storms caused by MC. It is, by a factor of ∼1.5, lower for the Sheath-induced storms.
      PubDate: 2013-11-01
       
  • Method of virtual trajectories for the design of gravity assisted missions
    • Abstract: Abstract A novel method of virtual trajectories is proposed for the design of multiple gravity assist trajectories. The database of virtual trajectories can be tabulated for any planetary sequence and used in subsequent calculations. Requirements for the mission duration and the launch date are taken into account during the iterative procedure of database screening and refinement. The results of applying the virtual trajectories method to the design of a mission to Uranus are presented.
      PubDate: 2013-11-01
       
  • The BDRG and SHOK instruments for studying gamma-ray burst prompt emission
           onboard the Lomonosov
           spacecraft
    • Abstract: Abstract One of the goals of the Lomonosov satellite designed by scientists of Moscow State University is to study the prompt emission of cosmic gamma-ray bursts. This paper describes the gamma-ray burst monitor in the gamma-ray range (the BDRG instrument) and the wide-field optical cameras (the SHOK instrument) for detecting both the gamma-ray burst prompt emission and its precursors.
      PubDate: 2013-11-01
       
  • Quaternion regularization in celestial mechanics and astrodynamics and
           trajectory motion control. I
    • Abstract: Abstract Regularization problems in celestial mechanics and astrodynamics are considered. The fundamental regular quaternion models of celestial mechanics and astrodynamics are presented. It is shown that the efficiency of analytical investigation and numerical solution of boundary problems of optimal trajectory motion control of spacecraft may be increased using quaternion astrodynamics models. The regularization problem of celestial mechanics and astrodynamics that implies eliminating the feature, which arises in the equations of the two-body problem in case of impact of the second body with the central body, is considered in the first section of the paper. The quaternion method for regularizing the equations of the perturbed spatial two-body problem suggested by the author is presented; the method is compared with Kustaanheimo-Stiefel (KS) regularization. Demonstrative geometric and kinematic interpretations of regularizing transformations are provided. Regular quaternion equations for the two-body problem, which generalize the regular Kustaanheimo-Stiefel equations, as well as regular equations in quaternion osculating elements and quaternion regular equations for perturbed central motion of a material point, are considered. The papers on quaternion regularization in celestial mechanics and astrodynamics are briefly analyzed.
      PubDate: 2013-09-01
       
  • Coronal mass ejections in July 2005 and an unusual heliospheric event
    • Abstract: Abstract Using the events in July 2005 as an example, the causes and peculiarities of Forbush effects produced by solar sources remote from the central zone are discussed. The event in question differs from other effects observed at the periphery of interplanetary disturbances by strong variations in cosmic rays on the background of weak disturbances in the solar wind and magnetic field of the Earth. The cloud of magnetized plasma ejected from the Sun was large and fast, but it passed to the west from the Sun-Earth line. According to performed estimates, the mass of the ejected substance was close to the upper boundary of mass for coronal mass ejections (CMEs). Anomalous parameters and high modulation capability of the formed solar wind disturbance are explained, in particular, by the fact that it combined several CMEs and that the last fast disturbance was prepared by a series of impulsive events in the active region of the Sun. Usually, such a great mass is ejected directly after the main energy release in strong solar flares. In the given case, a powerful MHD disturbance occurred approximately half an hour after a maximum of hard X-ray burst under the conditions when gas pressure in the flare loops became close to magnetic pressure, which was just a premise of the largescale ejection.
      PubDate: 2013-09-01
       
  • Making aerosol measurements using small satellite formation flying
    • PubDate: 2013-09-01
       
  • On the nonlinear problem of the three-axis reorientation of a three-rotor
           gyrostat in the game noise model
    • Abstract: Abstract The nonlinear game problem of the three-axis reorientation of an asymmetric solid body with three flywheels (rotors) has been solved. Acceptable levels of uncontrollable noise depending on given constraints of control moments have been estimated.
      PubDate: 2013-09-01
       
  • Qualitative studies of orbital elements evolution in the planetary
           resonance form of the three-body problem in the case of the Rayleigh
           dissipation
    • Abstract: Abstact In the planetary form of the three-body problem for first-order resonances the qualitative studies of the evolution of orbital elements of gravitating bodies’ were carried out taking into account the Rayleigh dissipation. The stationary solutions were considered and the phase trajectories were classified. The expressions for the deviation of orbital parameters were obtained.
      PubDate: 2013-09-01
       
  • Estimation of residual microaccelerations on board an artificial earth
           satellite in the monoaxial solar orientation mode
    • Abstract: Abstract The mode of monoaxial solar orientation of a designed artificial Earth satellite (AES), intended for microgravitational investigations, is studied. In this mode the normal line to the plane of satellite’s solar batteries is permanently directed at the Sun, the absolute angular velocity of a satellite is virtually equal to zero. The mode is implemented by means of an electromechanical system of powered flywheels or gyrodynes. The calculation of the level of microaccelerations arising on board in such a mode, was carried out by mathematical modeling of satellite motion with respect to the center of masses under an effect of gravitational and restoring aerodynamic moments, as well as of the moment produced by the gyrosystem. Two versions of a law for controlling the characteristic angular momentum of a gyrosystem are considered. The first version provides only attenuation of satellite’s perturbed motion in the vicinity of the position of rest with the required velocity. The second version restricts, in addition, the increase in the accumulated angular momentum of a gyrosystem by controlling the angle of rotation of the satellite around the normal to the light-sensitive side of the solar batteries. Both control law versions are shown to maintain the monoaxial orientation mode to a required accuracy and provide a very low level of quasistatic microaccelerations on board the satellite.
      PubDate: 2013-09-01
       
  • Penetration of solar cosmic rays into the Earth’s magnetosphere on
           January 28, 2012
    • Abstract: Abstract Results of the comparative analysis of the dynamics of SCR fluxes with energies of 1–100 MeV in the interplanetary environment according to the data of the ACE and Wind spacecraft and within the Earth’s magnetosphere according to the data of the GOES-15 and Electro-L satellites in the region of geostationary orbits, and POES-19 and Meteor-M1 in the region of polar caps during two increases in SCR of January 19–31, 2012, are presented. It is shown that the decrease in the efficiency of SCR penetration into the Earth’s magnetosphere in the region of the orbits under study on January 28, 2012, is related to the passage of the Earth’s magnetosphere through the interplanetary environment structure with a quasi-radial interplanetary magnetic field and a small pressure of the solar wind.
      PubDate: 2013-09-01
       
  • Electron guns for spacecraft
    • Abstract: Abstract Studies of three versions of electron guns (0.3 kV, 0.14 A; 20 kV, 0.1 A; 40 kV, 0.05 A) intended to operate aboard spacecraft during various space experiments are presented. The computer simulation results of electron-optical systems are given, the optimization of cathode-heating units and heat removal system are performed, circuit design of the gun power supplies for both the stationary mode and using a special modulator are discussed.
      PubDate: 2013-09-01
       
  • Application of laser diode beacons for determination of coordinates of
           space and ground objects
    • Abstract: Abstract We consider the principles of constructing measurement schemes with optical autonomous laser diode beacons for space and ground objects. The structure, functional scheme, and cyclogram of operation of such beacons are described. Possible scenarios of application of the beacons for providing high-precision localization of space and ground devices are analyzed.
      PubDate: 2013-09-01
       
  • On the arc length of observations of a small solar system body sufficient
           to classify it as hazardous
    • Abstract: Abstract This paper analyzes the accuracy of orbit determination calculated by observations of short arcs. In this case, we imposed the condition that the arc length and/or the distribution of arc observations should provide a confident classification of the orbit of a small celestial body allowing one to distinguish a potentially hazardous body, also including a threat of collision.
      PubDate: 2013-09-01
       
  • On the possibility of long-time existence of submicron particles injected
           in elongated elliptical orbits with low perigee in the near-Earth space
    • Abstract: Abstract On the basis of numerical experiments the theoretical possibility of long-time (longer than 1 month) and superlong-time (longer than 1 year) existence in orbit of technogenic microparticles (MPs) with radii of a few hundredths of a micrometer is demonstrated. MPs are injected into the near-Earth space (NES) in elongated elliptical low-perigee orbits with parameters, corresponding to Molniya satellite’s orbital parameters. Calculations were carried out taking into account disturbing effects on the MP orbital motion in NES of the following factors: the gravitational disturbance caused by polar oblateness of the Earth, the solar pressure force (calculated with using the techniques of the Mie theory), the drag force of a neutral component of background gas, as well as the electrodynamic forces caused by interaction of electric charge, induced on MPs, with the magnetic and electric fields of the NES.
      PubDate: 2013-07-01
       
  • Motions of two tethered asteroids
    • PubDate: 2013-07-01
       
 
 
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