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Sample records for active tilting-pad journal

  1. Stability of multi orifice active tilting-pad journal bearings

    DEFF Research Database (Denmark)

    Haugaard, Asger M.; Santos, Ilmar

    2010-01-01

    The stability properties of actively lubricated tilting-pad journal bearings are investigated theoretically. The bearing preload factor and control system gains are varied, and stable and unstable regions are identified. It is seen, that the control system influences bearing stability......, and that the nature and magnitude of this influence depends on the rotor mass, preload factor and rotational speed. Furthermore, it is shown that assuming the bearing pads to be rigid can produce a substantial error. A rigid pad model will overpredict the stable range of the bearing, thus it may lead to failure...

  2. Elastohydrodynamics Applied to Active Tilting-Pad Journal Bearings

    DEFF Research Database (Denmark)

    Haugaard, Martin Asger; Santos, Ilmar

    2010-01-01

    The static and dynamic properties of tilting-pad journal bearings with controllable radial oil injection are investigated theoretically. The tilting pads are modeled as flexible structures and their behavior is described using a three-dimensional finite element framework and linear elasticity....... The oil film pressure and flow are considered to follow the modified Reynolds equation, which includes the contribution from controllable radial oil injection. The Reynolds equation is solved using a two-dimensional finite element mesh. The rotor is considered to be rigid in terms of shape and size...

  3. Exploring integral controllers in actively-lubricated tilting-pad journal bearings

    DEFF Research Database (Denmark)

    Salazar, Jorge Andrés González; Santos, Ilmar

    2015-01-01

    Active tilting-pad journal bearings with radial oil injection combine good stability properties of conventional tilting-pad journal bearings with the capability of improving their dynamic properties even more by control techniques. The main contribution of this work is the experimental...... investigation of integral controllers for feedback-controlled lubrication with the aim of: a) presetting the static journal center and consequently exploring the changes of bearing dynamic properties; b) obtaining an integral controller capable of re-positioning the static journal eccentricity for matching...... equilibria under conventional hydrodynamic and feedback-controlled lubrication regimes. A novel application is proposed, that tries to build non-invasive perturbation forces and uses the active fluid film forces of the bearing as a calibrated shaker....

  4. Tilting-Pad Journal Bearings with Active Lubrication Applied as Calibrated Shakers: Theory and Experiment

    DEFF Research Database (Denmark)

    Cerda Varela, Alejandro Javier; Santos, Ilmar

    2014-01-01

    dependent calibration function, i.e. the transfer function between control signal and force over the rotor. This work presents a theoretical model of the calibration function for a tilting-pad journal bearing with active lubrication. The bearing generates controllable forces by injecting pressurized oil...... form of the Reynolds equation. The oil film model is formulated considering an elastothermohydrodynamic lubrication regime. The model is used to study the relevance and effects of different parameters on the calibration function, aiming at providing general guidelines for the active bearing design...

  5. Multi-orifice active tilting-pad journal bearings—Harnessing of synergetic coupling effects

    DEFF Research Database (Denmark)

    Haugaard, Martin Asger; Santos, Ilmar

    2010-01-01

    finite elements. To reduce computational work, a pseudo modal reduction is applied. Curves of dynamic bearing coefficients as well as the corresponding phase-magnitude plots are presented. Strong synergy between elastohydrodynamics and active control is observed, in particular for bearings with injection...

  6. Modeling of Tilting-Pad Journal Bearings with Transfer Functions

    Directory of Open Access Journals (Sweden)

    J. A. Vázquez

    2001-01-01

    Full Text Available Tilting-pad journal bearings are widely used to promote stability in modern rotating machinery. However, the dynamics associated with pad motion alters this stabilizing capacity depending on the operating speed of the machine and the bearing geometric parameters, particularly the bearing preload. In modeling the dynamics of the entire rotor-bearing system, the rotor is augmented with a model of the bearings. This model may explicitly include the pad degrees of freedom or may implicitly include them by using dynamic matrix reduction methods. The dynamic reduction models may be represented as a set of polynomials in the eigenvalues of the system used to determine stability. All tilting-pad bearings can then be represented by a fixed size matrix with polynomial elements interacting with the rotor. This paper presents a procedure to calculate the coefficients of polynomials for implicit bearing models. The order of the polynomials changes to reflect the number of pads in the bearings. This results in a very compact and computationally efficient method for fully including the dynamics of tilting-pad bearings or other multiple degrees of freedom components that interact with rotors. The fixed size of the dynamic reduction matrices permits the method to be easily incorporated into rotor dynamic stability codes. A recursive algorithm is developed and presented for calculating the coefficients of the polynomials. The method is applied to stability calculations for a model of a typical industrial compressor.

  7. Dynamic characteristics of polymer faced tilting pad journal bearings

    DEFF Research Database (Denmark)

    Simmons, Gregory F.; Cerda Varela, Alejandro Javier; Santos, Ilmar;

    2014-01-01

    Dynamic characteristics of polymer faced tilting pad journal bearings are presented. Investigations are conducted using a single pad, load on pad configuration over a range of shaft speeds and loads. Two polyether ether ketone (PEEK) faced pads, one polytetrafluoroethylene (PTFE) faced pad and two...... entirely PEEK pads are investigated to determine the effect of varying mean bearing pressure and pivot characteristics as well as different material properties of the polymer layer. Experimental results indicate increased damping and decreased stiffness and slightly increased oil film temperature...

  8. Tilting pad journal bearings - Measured and predicted stiffness coefficients

    Science.gov (United States)

    Parkins, D. W.; Horner, D.

    1993-07-01

    This paper presents measured and calculated characteristics of a tilting pad journal bearing suitable for high speed machinery. Descriptions are given of the experimental techniques used with this variety of bearing and the theoretical model for predicting performance. Measured values of pad temperature, eccentricity, attitude angle, and the four stiffness coefficients are given for a range of loads and rotational speeds. Data are given for both load on pad and between pad configurations, the two principal loading arrangements. Comparisons are made between the measured and predicted bearing temperatures and stiffness coefficients over a wide range of values.

  9. On the simplifications for the thermal modeling of tilting-pad journal bearings under thermoelastohydrodynamic regime

    DEFF Research Database (Denmark)

    Cerda Varela, Alejandro Javier; Fillon, Michel; Santos, Ilmar

    2012-01-01

    The relevance of calculating accurately the oil film temperature build up when modeling tilting-pad journal bearings is well established within the literature on the subject. This work studies the feasibility of using a thermal model for the tilting-pad journal bearing which includes a simplified...

  10. Discontinuity effects in dynamically loaded tilting pad journal bearings

    DEFF Research Database (Denmark)

    Thomsen, Kim; Klit, Peder; Vølund, Anders

    2011-01-01

    This paper describes two discontinuity effects that can occur when modelling radial tilting pad bearings subjected to high dynamic loads. The first effect to be treated is a pressure build-up discontinuity effect. The second effect is a contact-related discontinuity that disappears when a contact...

  11. Rotordynamic characteristics of flexure-pivot tilting-pad journal bearings

    Science.gov (United States)

    Armentrout, Richard W.; Paquette, Donald J.

    1993-07-01

    Many of today's modern turbomachines, especially those running at high speeds and high power ratings, require the superior stability characteristics of tilting-pad journal bearings to prevent rotor-dynamic instabilities. Until now, the design complexity of tilting-pad bearings has precluded their use in many small, high-volume applications where cost and size are important. This paper introduces a new one-piece journal bearing design, the flexure-pivot bearing, that offers many of the beneficial rotor-dynamic advantages of tilting-pad bearings, without the complexities of a multi-piece design. Performance data for a flexure-pivot bearing is shown for an application requiring a highly stable design, illustrating the effectiveness of the flexure-pivot bearing in offering rotordynamic stability approaching that of a tilting-pad bearing.

  12. Experimental study of tilting-pad journal bearings - Comparison with theoretical thermoelastohydrodynamic results

    Science.gov (United States)

    Fillon, Michel; Bligoud, Jean-Claude; Frene, Jean

    1992-07-01

    Operating characteristics of four-shoe tilting-pad journal bearings of 100 mm diameter and 70 mm length are determined on an experimental device. The load, between pad configuration, varies from 0 to 10,000 N and the rotational speed is up to 4000 rpm. Forty thermocouples are used in order to measure bearing element temperatures (babbitt, shaft, housing and oil baths). The influence of operating conditions and preload ratio on bearing performances are studied. Comparison between theoretical and experimental results is presented. The theoretical model is also performed on a large tilting-pad journal bearing which was investigated experimentally by other authors.

  13. Nonlinear dynamic behaviors of a rod fastening rotor supported by fixed–tilting pad journal bearings

    International Nuclear Information System (INIS)

    A rod fastening rotor with the fixed–tilting pad journal bearings support is modeled. The rotor is connected by rods, where the rods and connection surfaces of disks are considered as resistance bending springs with nonlinearity, and the inertia of the tilting pads is considered in the modeling. The nonlinear oil film forces of the fixed–tilting pad journal bearings are obtained by the database method. The nonlinear dynamic behaviors and bifurcation of the rotor-bearing system is investigated by the orbit diagrams, the time series, the frequency spectrum diagrams, and the Poincaré maps. The comparison of the orbits between the rod fastening rotor and integral rotor system is implemented, and the results reveal that the rod fastening rotor system is more stable than the integral rotor system. The orbits of the rotor system and the pendulum angles of pads are also studied at different preloads and pivot ratios

  14. Performance Improvement of tilting-pad journal bearings by means of controllable lubrication

    DEFF Research Database (Denmark)

    Cerda, Alejandro; Santos, Ilmar

    2012-01-01

    Tilting-Pad Journal Bearings (TPJB) are commonly used on high-performance turbomachinery due to their excellent stability properties at high speed when compared to other designs for oil film bearings. Hence, efforts have been made to improve the accuracy for the available models for these mechani...

  15. Feedback-controlled lubrication for reducing the lateral vibration of flexible rotors supported by tilting-pad journal bearings

    DEFF Research Database (Denmark)

    Salazar, Jorge Andrés González; Santos, Ilmar

    2015-01-01

    The feedback-controlled lubrication regime, based on a model-free designed proportional–derivative controller, is experimentally investigated in a flexible rotor mounted on an actively-lubricated tilting-pad journal bearing. With such a lubrication regime, both the resulting pressure distribution...... function is optimized in the stabilizing gain domain and then chosen from a subdomain imposed by servovalve restrictions. This work demonstrates enhancements of the dynamic response of flexible rotor-bearing systems supported by an active tilting-pad journal bearing by means of the feedback...... over the pads and hence the bearing dynamic properties are dynamically modified. The control strategy is focused on reducing the lateral vibrations of the system around its operational equilibrium within a wide frequency range. To synthesize the proportional–derivative controller gains, an objective...

  16. Nonlinear Dynamics Analysis of Tilting Pad Journal Bearing-Rotor System

    OpenAIRE

    Jiayang Ying; Yinghou Jiao; Zhaobo Chen

    2011-01-01

    The nonlinear dynamics theory is increasingly applied in the dynamics analysis of tilting pad journal bearing-rotor system. However, extensive work on system dynamics done previously neglects the influence caused by the moment of inertia of the pad. In this paper, a comparison is made between the responses of the rotor in the bearings with and without pad inertia effect. Taking the Jeffcott rotor system as an example, the characteristics of bearing-rotor system, such as bifurcation diagram, c...

  17. On the adjusting of the dynamic coefficients of tilting-pad journal bearings

    Science.gov (United States)

    Santos, Ilmar Ferreira

    1995-07-01

    This paper gives a theoretical and experimental contribution to the problem of active modification of the dynamic coefficients of tilting-pad journal bearings, aiming to increase the damping and stability of rotating systems. The theoretical studies for the calculation of the bearing coefficients are based on the fluid dynamics, specifically on the Reynolds equation, on the dynamics of multibody systems and on some concepts of the hydraulics. The experiments are carried out by means of a test rig specially designed for this investigation. The four pads of such a bearing are mounted on four flexible hydraulic chambers which are connected to a proportional valve. The chamber pressures are changed by means of the proportional value, resulting in a displacement of the pads and a modification of the bearing gap. By changing the gap, one can adjust the dynamic coefficients of the bearing. With help of an experimental procedure for identifying the bearing coefficients, theoretical and experimental results are compared and discussed. The advantages and the limitation of such hydrodynamic bearings in their controllable form are evaluated with regard to application on the high-speed machines.

  18. Vibration active control of tilting pad journal bearing rotor system based on the active lubrication%基于主动润滑可倾瓦轴承转子系统的振动主动控制

    Institute of Scientific and Technical Information of China (English)

    刘宏; 宫晓春; 王晋麟

    2011-01-01

    研究一类可倾瓦支承的单盘非对称转子系统的振动主动控制问题.首先建立了系统的非线性动力学方程,针对主动润滑控制系统设计了BP神经网络PID控制器对转子系统进行振动主动控制.通过计算分析可知,采用基于BP-PID的主动润滑系统能够很好的抑制系统的振幅,使系统在很高的转速时才发生油膜失稳,拓宽转子系统稳定运转的转速范围,在转子系统发生油膜失稳时系统的振幅也能够得到极大程度的控制.%The vibration active control of an unsymmetrical rotor supported by two tilting pad journal bearings is investigated in this paper. Firstly, the nonlinear governing equation of the rotor system is formulated. Then the BP neural network PID controller is designed with regard to the active lubricated control system is applied to suppress the vibration of the concerning rotor system. After calculation and analysis the persuasive results are obtained. The vibration amplitude of the rotor system is greatly reduced by means of the active lubricated control system through the BP neural network PID controller. The whip instability of the controlled system occurs at a very high rotational speed and the stable operation range is greatly broadened. The vibration amplitude can be significantly suppressed by the active lubricated control system when the rotor runs up against the whip instability.

  19. Experimental Identification of Dynamic Coefficients of Tilting-Pad Bearings with Active Lubrication

    DEFF Research Database (Denmark)

    Salazar, Jorge Andrés González; Cerda Varela, Alejandro Javier; Santos, Ilmar

    supply unit, b) servovalves, c) radial injection nozzles, d) displacement sensors and e) well-tuned digital controllers which turn the bearing static and dynamic properties controllable. A scaled-down industrial rotor, composed by a flexible rotor supported by a four rocker LBP tilting-pad journal......This article presents the experimental identification of the equivalent dynamic coefficients of an activelylubricated bearing under different lubrication regimes, namely: passive (no injection flow), hybrid (constant injection flow) and feedback-controlled (variable injection flow) lubrication...... bearing featuring active lubrication under light load conditions, is used for such a goal. The experimental identification is performed in the frequency domain by means of the measured FRFs and a finite element model of the rotor. The comparison between results under the different lubrication regimes...

  20. Vibration characteristics of rotor system with tilting-pad journal bearing of elastic and damped pivots

    Institute of Scientific and Technical Information of China (English)

    刘思涌; 肖忠会; 闫志勇; 陈朱杰

    2015-01-01

    In view of an entire dynamic model of tilting-pad journal bearing (TPJB) in which the pads swing and vibrate along geometric direction of preload, a TPJB of elastic and damped pivots was designed and manufactured. Vibration experiments were carried out under the conditions of different rotor bending stiffness and oil supply pressure to find out the relationship between the new bearing’s vibration depression effect and other dynamic parameters of the rotor. The result shows that critical amplitudes can be efficaciously reduced while system’s stability can be remarkably improved by this bearing. Besides, the bearing’s effect of vibration depression weakens as the rotor bending stiffness increases, but heightens it as the oil supply pressure increases.

  1. Frequency Response Analysis of an Actively Lubricated Rotor/Tilting-Pad Bearing System

    DEFF Research Database (Denmark)

    Nicoletti, Rodrigo; Santos, Ilmar

    2005-01-01

    In the present paper the dynamic response of a rotor supported by an active lubricated tilting-pad bearing is investigated in the frequency domain. The theoretical part of the investigation is based on a mathematical model obtained by means of rigid body dynamics. The oil film forces are inserted...... lubricated tilting-pad bearing. By applying a simple proportional controller it is possible to reach 30% reduction of the resonance peak associated with the first rigid body mode shape of the system. One of the most important consequences of such a vibration reduction in rotating machines is the feasibility...

  2. Dynamic Coefficients of a Tilting Pad With Active Lubrication: Comparison Between Theoretical and Experimental Results

    DEFF Research Database (Denmark)

    Cerda Varela, Alejandro Javier; Santos, Ilmar

    2015-01-01

    This paper deals with the validation of the mathematical model for predicting the equivalent stiffness and damping of an active tilting-pad bearing. The active bearing design includes an injection nozzle in the pad and a hydraulic supply system featuring a servovalve, which enables to modify...

  3. A novel test rig for the dynamic characterization of large size tilting pad journal bearings

    Science.gov (United States)

    Forte, P.; Ciulli, E.; Saba, D.

    2016-09-01

    The present work concerns the realization of a test bench for the dynamic characterization of high performance tilting pad journal bearings, within a collaboration between the Department of Civil and Industrial Engineering of Pisa, GE Oil&Gas and AM Testing. The objective is to cover journal diameters of interest of GE, from 150 to 300 mm, with peripheral speeds up to 150 m/s, static load up to 270 kN, dynamic loads up to 30 kN and frequencies up to 350 Hz, performances that make the apparatus very competitive worldwide. The adopted configuration has the test article (TA) floating at the mid-span of a rotor supported by two rolling bearings. The TA is statically loaded by a hydraulic actuator and excited dynamically by two orthogonal hydraulic actuators. Construction was recently concluded and preliminary tests are under way. In order to assess in advance the possible accuracy of the tests, a dynamic lumped parameter model of the test bench was developed to perform virtual experiments, including several possible sources of experimental errors and uncertainties. The model was implemented using reduced stiffness and mass matrices obtained from Finite Element Analysis by Component Modal Synthesis.

  4. Steady state characteristics of a tilting pad journal bearing with controllable lubrication: Comparison between theoretical and experimental results

    DEFF Research Database (Denmark)

    Cerda Varela, Alejandro Javier; Nielsen, Bo Bjerregaard; Santos, Ilmar

    2013-01-01

    This paper is aimed at presenting results regarding the static and thermal behavior of a tilting-pad journal bearing operating under controllable regime. The bearing is rendered controllable by injecting high pressure oil into the clearance using holes drilled across the bearing pads in the radial...... elastothermohydrodynamic lubrication regime), as well as using a test rig designed and built to this effect. The comparison between experimental and theoretical results provides solid ground to determine the accuracy of the available model for the the prediction of the steady-state behavior of the tilting-pad bearing...... with controllable lubrication. Among the parameters considered for the study are: oil film temperature field, resulting forces over rotor and pads, and rotor equilibrium position. The results obtained show good agreement between theory and experiment, as long as the assumptions on which the model is based...

  5. Design Optimization of Tilting-Pad Journal Bearing Using a Genetic Algorithm

    Directory of Open Access Journals (Sweden)

    Hamit Saruhan

    2004-01-01

    Full Text Available This article focuses on the use of genetic algorithms in developing an efficient optimum design method for tilting pad bearings. The approach optimizes based on minimum film thickness, power loss, maximum film temperature, and a global objective. Results for a five tilting-pad preloaded bearing are presented to provide a comparison with more traditional optimum design methods such as the gradient-based global criterion method, and also to provide insight into the potential of genetic algorithms in the design of rotor bearings. Genetic algorithms are efficient search techniques based on the idea of natural selection and genetics. These robust methods have gained recognition as general problem solving techniques in many applications.

  6. Performance of gas-lubricated cruciform-mounted tilting-pad journal bearings and a damped flexibly mounted spiral-groove thrust bearing

    Science.gov (United States)

    Ream, L. W.

    1974-01-01

    A test program was conducted to determine the performance characteristics of gas-lubricated cruciform-mounted tilting-pad journal bearings and a damped spiral-groove thrust bearing designed for the Brayton cycle rotating unit (BRU). Hydrostatic, hybrid (simultaneously hydrostatic and hydrodynamic), and hydrodynamic tests were conducted in argon gas at ambient pressure and temperature ranges representative of operation to the 10.5 kWe BRU power-generating level. Performance of the gas lubricated bearings is presented including hydrostatic gas flow rates, bearing clearances, bearing temperatures, and transient performance.

  7. Rotor stability estimation with competing tilting pad bearing models

    Science.gov (United States)

    Cloud, C. Hunter; Maslen, Eric H.; Barrett, Lloyd E.

    2012-05-01

    When predicting the stability of rotors supported by tilting pad journal bearings, it is currently debated whether or not the bearings should be represented with frequency dependent dynamics. Using an experimental apparatus, measurements of pad temperatures, unbalance response and stability are compared with modeling predictions for two tilting pad bearing designs. Predictions based on frequency dependent tilting pad bearing dynamics exhibited significantly better correlation with the stability measurements than those assuming frequency independent dynamics.

  8. 大型动静力径向可倾瓦轴承热弹流体润滑研究%Study on Thermal Elastohydrodynamic Lubrication of Large Hybrid Tilting-Pad Journal Bearings

    Institute of Scientific and Technical Information of China (English)

    王凤才; 徐华; 朱均

    2001-01-01

    用有限元素法建立瓦块3维弹性变形计算模型。针对小包角瓦块支点非均匀布置方式及下方瓦块设有高压油顶起油囊的大型低速重载动静力润滑径向可倾瓦轴承,研究了由于瓦块3维弹性变形对轴承热动力润滑性能的影响。结果表明,在低速重载条件下需要考虑瓦块的弹性变形对动静力可倾瓦轴承热动力润滑性能的影响。%The finite element method has been used to solve thethree-dimension pad elasticity equations governing the displacement field in the tilting-pad.The influences of the three-dimension pad deformations on the thermohydrodynamic performances of a hybrid tilting-pad journal bearings have been studied under the conditions of the low speed and heavy duty for the non-uniform pivot distribution of the small wrap angle pads and the low pads with high pressure oil recess.The results show that the effects of the small wrap angle pad deformations should be taken into account on the thermohydrodynamic performances of the hybrid tilting-pad journal bearings under the heavy duty condition.

  9. 大型卧式水轮发电机可倾瓦径向轴承试验研究%Experimental Investigation of the Tilting Pad Journal Bearing For Large Horizontal Hydro-generators

    Institute of Scientific and Technical Information of China (English)

    范寿孝; 吴军令; 武中德

    2016-01-01

    可倾瓦径向轴承将会在大型卧式水轮发电机中得到广泛应用。利用可倾瓦径向轴承试验台对所开发的大型卧式水轮发电机组可倾瓦径向轴承进行了尺寸1:1的工况模拟试验。通过分析试验数据,对所开发轴承结构的性能有全面认识。所开发的可倾瓦径向轴承满足大型卧式水轮发电机的运行要求,保证了机组运行的可靠性。%Tilting Pad Journal bearing can be used widely in large Horizontal Hydro-generators. The new developed bearing structure of 1:1 size for the large Horizontal Hydro-generators was tested on the large tilting Pad Journal bearing tested stand. The comprehensive characters of the new developed bearing were understood through analysis of experimental data. The new developed bearing structure is available for large Horizontal Hydro-generators and can ensure the reliability of the unit.

  10. Thermal Hydrodynamic Lubrication Analysis of Tilting-pad Journal Bearing with Multiple-pads%多瓦可倾瓦径向滑动轴承热润滑性能分析

    Institute of Scientific and Technical Information of China (English)

    黎伟; 陈志祥; 汪久根

    2011-01-01

    The journal bearings with multiple tilting pads are widely used to support the shaft assembly of turbo generators. With the considerations of variable viscosity and density, a model of tilting-pad journal bearing with multiple-pads was established, and was analyzed using finite difference method. A computer program was developed to calculate the minimum film thickness, pressure distribution and three-dimensional temperature distribution of each pad, and the effects of radial loads, rotational speeds and oil viscosity grades of nine cases on the thermal hydrodynamic lubrication ( THD ) of the bearings were analyzed. The results indicate that this model and its computer program are able to analyze the features of thermal hydrodynamic lubrication of multi-tilting-pad journal bearings. The oil viscosity and rotational speed have much effect on the THD of bearing. The titling angle and its position of pad influence the THD of some of the pads,result in some difference with the situation of circular journal bearing.%考虑变黏度、密度的情况,建立多瓦可倾瓦径向滑动轴承的数学模型,用有限差分法求解其热流体动力润滑(THD)模型,分别计算12块瓦可倾瓦径向滑动轴承的最小油膜、压力分布和三维温度场分布,分析不同载荷、不同转速、不同润滑油黏度等对轴承各瓦的热润滑性能影响.结果显示,建立的模型及其计算程序能计算分析多瓦可倾瓦径向滑动轴承的热润滑问题.润滑油黏度和转子转速对多瓦可倾瓦径向滑动轴承的热润滑性能有较大的影响;瓦块绕支点的倾斜以及瓦块所处的角度位置会影响部分瓦块的热润滑性能,出现与普通圆形径向滑动轴承不一致的润滑性能变化.

  11. Transient Thermal Thermal Elastohydrodynamic Lubrication Performance of Multi-tilting-pad Journal Bearing%多瓦可倾瓦轴承的瞬态热弹流润滑性能分析

    Institute of Scientific and Technical Information of China (English)

    余谱; 汪久根; 王庆九

    2014-01-01

    A mathematical model of the multi-tilting-pad journal bearings in terms of thermal elastohydrodynamic lubri-cation(EHD)was established,and the transient lubrication performance of multi-tilting-pad journal bearings was analyzed. The orbit of shaft center from initial position to equilibrium position was obtained with full numerical simulation,and the lubrication performance at equilibrium position was studied,including film thickness,hydrodynamic pressure,temperature and thermal distortion and elastic deflection of pad face.The results show that the shaft center needs a quite long time to a-chieve the equilibrium position,and thermal distortion has a greater influence on the lubrication performance compared with the elastic deflection under a light load.%建立多瓦可倾瓦轴承瞬态热弹流润滑的数学模型,分析多瓦可倾瓦轴承在启动阶段的瞬态润滑性能,通过计算得到轴承由初始位置运动到平衡位置的轴心运动轨迹,并得到平衡位置时轴承的各项润滑性能参数,包括油膜厚度、流体动压力、瓦面温度与瓦面热弹变形等。结果表明,在开机启动阶段,轴心轨迹需要经历一段时间历程才能收敛于平衡位置,在载荷较小情况下,热变形对润滑性能的影响要比弹性变形大。

  12. Study on adiabatic transient behavior of tilting-pad journal bearing%可倾瓦径向滑动轴承绝热瞬态过程分析

    Institute of Scientific and Technical Information of China (English)

    马希直; 朱均

    2009-01-01

    为了研究可倾瓦径向轴承在载荷扰动下的绝热瞬态行为.对瞬态油膜压力和温度分布采用了时变的Reynolds方程和能量方程,建立了轴颈及瓦块动力学方程.应用有限差分及Newton-Raphson法对方程联立求解,模拟了阶跃载荷冲击工况下可倾瓦径向轴承热瞬态非线性响应过程.给出瞬态过程中油膜最高温度、最小膜厚等参数的变化规律.结论认为瞬态过程中,油膜温度和膜厚变化量较大,油膜温度和膜厚响应有一定的超调量,瞬态过程中有可能因油膜温升过高或膜厚太小而导致失效.%The purpose of this paper is to study the thermal behavior of a tilting-pad journal bearing subject to a sudden dynamic load.The time-dependent Reynolds equation and energy equation were used to analyze the transient pressure and temperature of the oil film during this period.The dynamic equations were developed to simulate the motion of journal and pads.These equations with initial conditions were solved numerically using finite differential methods and the Newton-Raphson iterative scheme simultaneously.The nonlinear thermal transient response of tilting-pad bearing was simulated under a step load function.The change of maximum film temperature and minimum film thickness as well as other parameters were presented.Oil film temperatures and film thickness were found to vary considerably,and there existed some overshoot in the responses of maximum temperature and minimum film thickness,leading possibly to the damage of bearing during the transient period.

  13. Thermo-elastohydrodynamic Lubrication Analysis on Multi-tilting-pad Journal Bearing with Misalignment%考虑轴颈偏斜的多瓦径向滑动轴承热流体动力润滑分析

    Institute of Scientific and Technical Information of China (English)

    黎伟; 汪久根; 洪玉芳; 陈志祥

    2012-01-01

    建立考虑轴颈偏斜的多瓦可倾瓦径向滑动轴承热弹流润滑(TEHD)分析的数学模型,求解轴瓦表面当量弹性变形,计算得到轴颈偏斜时的瓦块油膜厚度、油膜压力分布和瓦面温度分布等,并对比分析无轴线偏斜和有轴线偏斜情况,得到多瓦可倾瓦径向滑动轴承的热弹流润滑性能差异.结果表明,TEHD模型下,轴颈偏斜会导致轴承油膜厚度、油膜压力和瓦面温度等分布在轴向不对称,并且导致轴承油膜厚度明显减小.%A thermo-elastohydrodynamic lubrication ( TEHD ) model considering journal misalignment for multi tilting pad journal bearing was established, the equivalent elastic displacement of pad face was analyzed. The distributions of film thickness, hydrodynamic pressure and pad face temperature of each pad were obtained with numerical procedure, and the lubrication performances of the bearings with journal misalignment were compared with those without journal misalignment in terms of TEHD model. The numerical results indicate that the journal misalignment results in asymmetric distributions of film thickness, hydrodynamic pressure and pad face temperature in axial direction, and remarkable decrease of the film thickness.

  14. Calculation of Steady-State Equilibrium Position of Tilting Pad Journal Bearing in Motorized Spindle%电主轴用可倾瓦轴承稳态平衡位置计算

    Institute of Scientific and Technical Information of China (English)

    于慎波; 陈仕彬

    2012-01-01

    A novel search method was presented to calculate the steady-state equilibrium position of a tilting pad journal bearing in motorized spindle for solving the problem of difficult search of equilibrium position from the nonlinear hydrodynamic force. It is found that the slight variations in fulcrum position of pads will have a great influence on the 8 hydrodynamic coefficients during the calculation. With the proposed methods,the steady-state equilibrium position can be calculated in multiple directions search in motion polar coordinate system. The calculated results show that the stability is improved by increasing the difference between outside diameter of pad and inner diameter of bearing bracket. Never- ending loop in process of search is avoided effectively by using of the novel search method. The method can also be applied to other forms of hydrodynamic bearings.%提出一种计算电主轴用可倾瓦滑动轴承稳态平衡位置的新搜索方法,解决了油膜力非线性导致的平衡位置难以搜索的问题.在计算过程中,发现瓦背支点位置的微小变化会在很大程度上影响可倾瓦轴承的8个动力系数.用该搜索方法,采用运动极坐标系同时对多个方向进行搜索,计算出稳态平衡位置.计算结果表明,适当增大瓦背与轴承座的半径差会提高可倾瓦轴承的稳定性;新搜索方法可以有效避免搜索中的死循环,且可用于其他形式的滑动轴承.

  15. A miniature tilting pad gas lubricated bearing

    Science.gov (United States)

    Sixsmith, H.; Swift, W. L.

    1983-12-01

    This paper describes the design and development of a miniature tilting pad gas bearing developed for use in very small turbomachines. The bearings have been developed for cryogenic turboexpanders with shaft diameters down to about 0.3 cm and rotational speeds up to one million rpm. Cryogenic expansion turbines incorporating this type of bearing should be suitable for refrigeration rates down to about 10 w.

  16. Tilting-Pad Guide Bearing in Large Hydro-unit

    Directory of Open Access Journals (Sweden)

    Li-Feng Ma

    2000-01-01

    Full Text Available A new numerical method is proposed for predicting the nonlinearity of tilting-pad guide bearing oilfilm force in the rotor-bearing system in a large hydro-unit. Nonlinear displacement and velocity of the journal center, as well as nonlinear tilting angles and angular velocities of the pads in non-stationary Reynolds equation are taken into account. This method is also suited for other small rotor-bearing system. As an example, the response due to a momentarily created unbalance is Calculated. The nonlinear motion patterns of the pad and journal whirling orbit are obtained. Finally, the nonlinear orbit is compared to the linear one that could be calculated from linear stiffness and damping coefficients. It is shown that there are important differences between those two orbits and that the nonlinear simulation is more accurate.

  17. Numerical and Experimental Research on Dynamic Characteristics of Tilting-pad Journal Bearing of Pivot Stiffness and Damping%支点弹性、阻尼可倾瓦轴承动力特性数值仿真及试验研究

    Institute of Scientific and Technical Information of China (English)

    刘思涌; 肖忠会; 闫志勇; 陈朱杰

    2014-01-01

    In view of the characteristic of the tile which swings and slightly vibrates through geometric direction of preload, an analytical model for vibration of entire dynamic characteristics of tilting pad bearing and its corresponding simplified dynamic model of 8 parameters are made. Based on this theory, the tilting-pad journal bearing of pivot stiffness and damping is designed. The resilient pads are set between the tiles and the bearings, thus, the pivots of the tiles are put on the resilient pads and a small clearance is left between the resilient pads and the bearings. Therefore, the oil can be shared by the small clearance and the bearing lubrication system, and that can cause squeeze film damping effect which improves the damping coefficient of the system. According to different processing technic, two kinds of tilting-pad journal bearing of pivot stiffness and damping are designed, and their dynamic characteristics are worked out by numercial and experimental research. The result shows that the tilting-pad journal bearing of pivot stiffness and damping can increase the first-order damping of rotor-bearing system and thus improve system's stability obviously.%依据考虑瓦块摆动和沿几何预载荷方向微幅振动的可倾瓦轴承完全动力特性的解析模型及其对应的八参数简化动力模型,设计制备了支点弹性、阻尼特性可倾瓦轴承。该轴承通过在瓦块支点与轴承体之间设置弹性垫片,使瓦块支点支撑在弹性垫片上,弹性垫片与轴承体之间存在微小间隙并与轴颈润滑系统共享油路以实现局部挤压油膜效应。根据不同加工工艺,制备了两种形式的新型支点弹性、阻尼轴承,并通过理论计算模拟与试验分析对两种新型轴承的动力特性进行研究。结果表明,支点弹性、阻尼可倾瓦轴承能够增大转子的一临界阻尼,有效提高转子系统稳定性。

  18. 瓦面热变形对多瓦可倾瓦径向滑动轴承弹流润滑的影响%Effects of Pad Face Thermal Distortion on Thermal Hydrodynamic Lubrication Performance of Multi-tilting-pad Journal Bearing

    Institute of Scientific and Technical Information of China (English)

    余谱; 汪久根; 洪玉芳

    2013-01-01

    A thermal distortion model for multi-tilting-pad journal bearing was established,and the differences of lubrication performances of the multi-tilting-pad journal bearings were comparatively analyzed based on the thermal elastohydrodynamic lubrication (TEHD) model with only considering the elastic deformation and with considering the elastic deformation and the thermal distortion of pad face simultaneously.The influences of thermal distortion of pad face on lubrication state were analyzed.The numerical results indicate that the thermal distortion of pad face results in the increase of minimum film thickness and the decrease of pad face temperature,however a little change of the hydrodynamic pressure.The calculated results based on TEHD model with considering the thermal distortion of pad face was compared with the experimental data,the effectiveness of this calculation method was confirmed.%建立多瓦可倾瓦径向滑动轴承热变形分析的数学模型,对比分析仅考虑弹性变形和同时计入弹性变形和热变形情况下多瓦可倾瓦径向滑动轴承的弹流润滑性能差异,分析轴瓦热变形对轴承弹流润滑性能的影响.结果表明,轴瓦热变形导致最小油膜厚度增大、最高瓦面温度下降,但对流体动压力的影响较小.将计入热变形的弹流模型计算结果与实验结果进行比较,基本验证了程序包的正确性.

  19. Stability Analysis of an Industrial Gas Compressor Supported by Tilting-Pad Bearings Under Different Lubrication Regimes

    DEFF Research Database (Denmark)

    Cerda, Alejandro; Santos, Ilmar

    2012-01-01

    This work is aimed at a theoretical study of the dynamic behavior of a rotor-tilting pad journal bearing (TPJB) system under different lubrication regimes, namely, thermohydrodynamic (THD), elastohydrodynamic (EHD), and hybrid lubrication regime. The rotor modeled corresponds to an industrial com...

  20. 某台燃机啮合过程中可倾瓦突发振动的诊断与治理%Abnormal Vibration Fault Diagnosis and Overhaul of a Tilting-pad Journal Bearingin a Gas Turbine Generator Unit During Mesh Process

    Institute of Scientific and Technical Information of China (English)

    郭玉杰; 邵荣国; 谷保民

    2012-01-01

    A Serious unstable vibration occurred in a gas turbine during mesh process. Hie amplitude often exceeds 500(un when vibration occurs. The unit can' t run safely and reliably. Large subsynchronous vibration occurred in the mesh process. It is found that oil whirl of journal bearing is the main cause of the abnormal vibration. The vibration is solved by bearing elevation adjustment and bearing top gap reduction. It is noted that large unstable vibration occurred in the tilting pad journal bearing, which is thought as the most stable bearing among many kinds of bearings till now. The reason is analyzed. Journal center movement in the horizontal direction is large in case of fault tilting pad bearing . It will influence bearing stability.%某台燃气轮发电机与汽轮机啮合过程中经常会出现突变振动.振动一旦突发,幅值经常超过500μm,导致机组无法安全运行.振动突发后出现了很大幅值的半频分量.分析表明,轴承油膜涡动是导致振动的主要原因.通过调整轴承标高和减少轴承顶隙,消除了机组不稳定振动.需要指出的是,出现振动的轴承是可倾瓦,这是目前人们所公认的稳定性较高的轴承,但是实际运行中依然出现了失稳振动.对导致该现象的原因进行了分析.指出可倾瓦故障状态下,轴颈中心位置会发生较大的水平偏移,从而影响轴承稳定性.

  1. Tilting pad gas bearing design for micro gas turbines

    Science.gov (United States)

    Nabuurs, M. J. H. W.; Al-Bender, F.; Reynaerts, D.

    2013-12-01

    This paper presents the results of a dynamic stability investigation of a micro gas turbine supported by two flexible tilting pad bearings. The pad flexibility allows centrifugal and thermal shaft growth of the rotor but can also introduce undesirable rotor instabilities. An eigenvalue analysis on the linearised rotor-bearing dynamics is performed to estimate the required pad stiffness and damping for stability. Results of the eigenvalue analysis are evaluated by fully nonlinear orbit simulations.

  2. Influences of Manufacturing Tolerances on Thermo-elastohydrodynamic Lubrication Performance of Multi-tilting-pad Journal Bearing%制造误差对多瓦可倾瓦径向滑动轴承热流体动力润滑性能的影响

    Institute of Scientific and Technical Information of China (English)

    余谱; 汪久根; 王庆九; 黎伟

    2012-01-01

    A thermo-elastohydrodynamic lubrication(TEHD)model considering manufacturing tolerances for multi tilting pad journal bearing was established, the film thickness, film pressure and pad face temperature distributions of each pad were analyzed,and the lubrication performances of the bearings were comparatively examined with respect to effects of manufacturing tolerances on lubrication state with the TEHD model. The numerical results indicate that the manufacturing tolerance of the shaft diameter results in the increase of the maximum film pressure, and an increase in the curvature radius of the pad results in the increase of both film thickness and film pressure, while error of preload almost has no visible effects on the bearing performance.%建立考虑制造误差的多瓦可倾瓦径向滑动轴承热弹流润滑(TEND)分析的计算模型,计算得到有制造误差时的瓦块油膜厚度、油膜压力、瓦面温度分布等,并对比分析多瓦可倾瓦径向滑动轴承在有无制造误差时的热弹流润滑性能差异.结果表明,轴径误差会导致最大油膜压力显著增大,轴瓦瓦面曲率半径误差会导致最小油膜厚度和最大油膜压力均有一定增大,而预载荷误差对轴承的润滑性能无明显影响.

  3. On the Design of Tilting-Pad Thrust Bearings

    DEFF Research Database (Denmark)

    Heinrichson, Niels

    2007-01-01

    Pockets are often machined in the surfaces of tilting-pad thrust bearings to allow for hydrostatic jacking in the start-up phase. Pockets and other recesses in the surfaces of bearing pads influence the pressure distribution and thereby the position of the pivot resulting in the most advantageous...... pad convergence ratio. In this thesis, a theoretical approach is applied in the attempt to quantify the influence of recesses in the pad surfaces. The recesses may be relatively deep and enclosed as is the case with pockets designed for hydrostatic jacking. Such recesses are characterized by low...... friction and a small pressure build-up. As in parallel-step bearings the recesses may also have a depth of the same order of magnitude as the oil film thickness. Such recesses are characterized by a strong pressure build-up caused by the reduction of the flow area at the end of the recess. Numerical models...

  4. Experimental identification of dynamic coefficients of lightly loaded tilting-pad bearings under several lubrication regimes

    DEFF Research Database (Denmark)

    Salazar, Jorge G.; Santos, Ilmar F.

    2016-01-01

    This paper presents the identified dynamic coefficients of a lightly loaded actively lubricated bearing under three lubrication regimes: passive, hybrid and feedback-controlled. The goal is to experimentally demonstrate the feasibility of modifying the bearing dynamic properties via active...... lubrication. Dominated by the latest two regimes, the bearing properties become adjustable or controllable due to the injection of either a constant or variable pressurized oil flow. Such a flow is regulated by a hydraulic control system composed of (a) a high-pressure oil supply unit, (b) servovalves, (c......) radial injection nozzles, (d) displacement sensors and (e) well-tuned digital controllers. A scaled-down industrial rotor featuring active lubrication, composed of a flexible rotor supported by a four-rocker load-between-pads tilting-pad bearing under light load condition, is used for this objective...

  5. Analysis of tilting-pad oil seals for high pressure centrifugal compressors

    OpenAIRE

    Salem, Khlifi

    1988-01-01

    Oil ring seals are one major source of instability in high pressure centrifugal compressors. This thesis presents a method for analysis of an improved seal concept that has been used in very high pressure designs (900 PSI). The improved design uses a combination of ring seals and tilting pad bearing elements. The stable tilting pad is used to center the heavily grooved seal element. The eight stiffness and damping coeflicients which represent the hydrodynamic forces between the ...

  6. Reducing friction in tilting-pad bearings by the use of enclosed recesses

    DEFF Research Database (Denmark)

    Heinrichson, Niels; Santos, Ilmar

    2008-01-01

    A three-dimensional thermoelastohydrodynamic model is applied to the analysis of tilting-pad bearings with spherical pivots and equipped with deep recesses in the high-pressure regions. A potential for a 10-20% reduction in the friction loss compared to conventional plain bearing pads is documented....... Design suggestions minimizing the power loss are given for various length-to-width ratios. The tilting angle in the sliding direction is more sensitive to correct positioning of the pivot point than conventional bearing pads. Improving the performance by equipping a tilting-pad bearing with a deep recess...... therefore requires accurate analysis and design of the bearing. Similarly, a high sensitivity perpendicular to the sliding direction suggests that this method of reducing friction is more feasible when using line pivots or spring beds than when using spherical pivots for controlling the tilting angle....

  7. Two-scale EHL: three-dimensional topography in tilted-pad bearings

    OpenAIRE

    de Boer, GN; Hewson, RW; Thompson, HM; Gao, L.; Toropov, VV

    2014-01-01

    Derived from the Heterogeneous Multiscale Methods (HMM), a two-scale method is developed for the analysis of Elastohydrodynamic Lubrication (EHL) and micro-EHL in tilted-pad bearings with three-dimensional topography. A relationship linking the pressure gradient to mass flow rate is derived and represented in the bearing domain through homogenisation of near-periodic simulations describing the Fluid Structure Interaction (FSI) of topographical features. For the parameters investigated the inf...

  8. Control system design for flexible rotors supported by actively lubricated bearings

    DEFF Research Database (Denmark)

    Nicoletti, Rodrigo; Santos, Ilmar

    2008-01-01

    and keeping the lengths of the two eigenvalues constant in the real-imaginary plane. The methodology is applied to an industrial gas compressor supported by active tilting-pad journal bearings. The unbalance response functions and mode shapes of the flexible rotor with and without active control are presented...... displacement and velocity of the shaft at the bearing positions....

  9. Linear and Non-Linear Control Techniques Applied to Actively Lubricated Journal Bearings

    DEFF Research Database (Denmark)

    Nicoletti, Rodrigo; Santos, Ilmar

    2003-01-01

    to a tilting-pad journal bearing, are analysed and discussed. Important conclusions about the application of integral controllers, responsible for changing the rotor-bearing equilibrium position and consequently the "passive" oil film damping coefficients, are achieved. Numerical results show an effective......The main objectives of actively lubricated bearings are the simultaneous reduction of wear and vibration between rotating and stationary machinery parts. For reducing wear and dissipating vibration energy until certain limits, one can count with the conventional hydrodynamic lubrication....... For further reduction of shaft vibrations one can count with the active lubrication action, which is based on injecting pressurised oil into the bearing gap through orifices machined in the bearing sliding surface. The design and efficiency of some linear (PD, PI and PID) and non-linear controllers, applied...

  10. Nonlinear dynamic analysis of a flexible rotor system with combined fixed-tilting pad journal bearings%固定瓦-可倾瓦组合径向轴承-柔性转子系统非线性运动分析

    Institute of Scientific and Technical Information of China (English)

    吕延军; 张永芳; 于杨冰; 虞烈

    2011-01-01

    Based on Reynolds equation with Reynolds boundary conditions, Castelli method was employed to solve Reynolds equation for oil lubrication in bearings.By doing so, a profile of nonlinear oil film force of single pad journal bearing was established.According to the structure of a combined journal bearing, its nonlinear oil film force was obtained using retrieval, interpolation, and assembly techniques.For a symmetrical flexible Jeffcott rotor system supported by combined journal bearings, the nonlinear motions of the rotor center were calculated using self-adaptive Runge-Kutta method and Poincar mapping with different rotational speeds and different pivot ratios.Numerical results showed that the system performance is slightly better when the pivot ratio changes from 0.5 to 0.6, and reveals nonlinear phenomena of periodic, period-doubling, quasi-periodic motion, etc.%针对流体润滑中具有Reynolds边界条件的非定常Reynolds方程,运用Castelli法求解Reynolds方程,生成了单块轴瓦坐标系下的非线性油膜力数据库.根据固定瓦-可倾瓦组合滑动轴承的结构特点,对单瓦库进行检索、插值和拼装,获得了固定瓦-可倾瓦组合径向滑动轴承的非线性油膜力.针对柔性转子-组合滑动轴承系统,运用自适应步长Runge-Kutta法和Poincar6映射计算了不同支点比下的轴颈的非线性运动轨迹.数值结果表明,转子系统表现出周期解,倍周期解和准周期解等非线性现象,支点比为0.6时的系统性能略优于支点比为0.5时的系统性能.

  11. The influence of Injection Pockets on the Performance of Tilting-Pad Thrust Bearings: Part I - Theory

    DEFF Research Database (Denmark)

    Heinrichson, Niels; Santos, Ilmar; Fuerst, Axel

    2006-01-01

    This is Part I of a two-part series of papers describing the effects of high pressure injection pockets on the operating conditions of tilting-pad thrust bearings. A numerical model based on the Reynolds equation is developed extending the three dimensional thermo-elasto-hydrodynamic (TEHD......) analysis of tilting-pad thrust bearings to include the effects of high pressure injection and recesses in the bearing pad. The model is applied to the analysis of an existing bearing of large dimensions and the influence of the pocket is analyzed. It is shown that a shallow pocket positively influences...

  12. Influence of gas bubbles on nonlinear dynamic characteristics of the oil film of a tilting pad bearing

    Science.gov (United States)

    Khlopenko, N. Ya.

    1996-01-01

    The influence of a comparatively low volume concentration of gas microbubbles contained in oil on nonlinear characteristics describing the behavior of an oil film in the guide gap of a hydrodynamic tilting pad bearing under action of a low-frequency harmonic force is analyzed using a numerical dynamic model of a collar-oil film-pad system. It is shown that bubbles in the oil greatly affect the efficiency of the tilting pad bearing. Results of oil-film-dynamics investigations reported previously (including those of the present author) are generalized.

  13. Optimal design of Tilting-Pad Thrust Bearings with High Pressure Injection Pockets

    DEFF Research Database (Denmark)

    Heinrichson, Niels; Santos, Ilmar

    2006-01-01

    to move towards the leading edge of the pads as the pocket size is increased. A large pocket is seen to negatively influence the performance with respect to friction loss at most operating conditions while at some operating conditions it has a small positive influence. The small pocket has a slight...... positive influence on the friction loss at most operating conditions. Moderate thermal crowning is shown to have a positive effect on performance, reducing friction loss.......A thermo-elasto-hydrodynamic(TEHD) model based on the Reynolds equation has been used to study the effect of oil injection pockets on the performance of tilting pad thrust bearings. The optimal position of the pivot both with respect to load carrying capacity and minimal power consumption is seen...

  14. Analysis on Static Performance of Tilting Pad Sliding Bearing%可倾瓦滑动轴承的静态性能分析

    Institute of Scientific and Technical Information of China (English)

    李伟光; 彭喆; 周平

    2013-01-01

    The static performances of tilting pad bearings were studied.The Reynolds equation of tilting pad sliding bearings was solved by finite difference method,the calculation program of the oil film pressure distribution of three tilting pad sliding bearing was written,and the oil film bearing capacity and film thickness distribution were obtained through the iterative calculation of Reynolds equation using Matlab software.The results show that the film thickness in the same axial angle of three tilting pads bearing bush is equal,and the minimum film thickness and maximum film pressure are both ap-peared in the lower bush.When other conditions are the same,the higher the eccentric rate is,the greater the bearing ca-pacity of the oil film is,and the lower the damping ratio,temperature and power consumption are.While the temperature rising and power consumption are increased in linearity along with the axis journal speed.Therefore in the design and se-lection of bearings,the low-speed and high eccentricity should be chosen in order to meet bearing capacity needs.%研究可倾瓦滑动轴承的静态性能。采用有限差分法求解可倾瓦滑动轴承的雷诺方程,编写三瓦可倾瓦滑动轴承油膜压力分布的计算程序,使用Matlab软件对雷诺方程进行迭代运算,得到轴承的油膜承载力和油膜厚度的分布。结果表明:三瓦可倾瓦滑动轴承轴瓦上同一周向角度的油膜厚度在轴向上是相等的,最小油膜厚度与最大油膜压力均出现在下轴瓦上;在其他条件不变的情况下,偏心率越大时,油膜承载力越大,阻尼系数、温升和功耗越低,而温升和功耗随轴颈转速的增加而呈近似线性规律增加,因此在设计与选用轴承时,为满足轴承承载力的需求,应尽量选择低的轴颈转速和高的偏心率。

  15. The Influence of Injection Pockets on the Performance of Tilting-Pad Thrust Bearings - Part I: Theory

    DEFF Research Database (Denmark)

    Heinrichson, Niels; Santos, Ilmar; Fuerst, Axel

    2007-01-01

    This is Part I of a two-part series of papers describing the effects of high-pressure injection pockets on the operating conditions of tilting-pad thrust bearings. In Part I a numerical model based on the Reynolds equation is developed extending the threedimensional thermoelastohydrodynamic (TEHD......) analysis of tilting-pad thrust bearings to include the effects of high-pressure injection and recesses in the bearing pads. The model is applied to the analysis of an existing bearing of large dimensions and the influence of the pocket is analyzed. In the analysis, the high-pressure oil injection used...... for hydrostatic jacking is turned off (i.e., only the effect of the pocket is studied). It is shown that a shallow pocket positively influences the performance of the bearing because it has characteristics similar to those of a Rayleigh-step bearing. In Part II of the paper (Heinrichson, N., Fuerst, A...

  16. Swing characteristic of pads in tilting pad bearing%可倾瓦轴承瓦块摆动特性

    Institute of Scientific and Technical Information of China (English)

    王永亮; 刘占生; 钱大帅

    2011-01-01

    The geometric relations of pad on tilting-pad bearing were studied,the relationship between tile pendulum angle and structural parameters were established by the oil-film force model of finite length tilting pad bearing and equilibrium equation,and the basic law of tile pendulum angle change was analyzed.The study shows that the tile pendulum angle is determined by the pad structural parameters,the eccentricity ratio of tilting pad bearing and the clearance ratio,but independent of shaft rotating speed,viscosity of lubrication oil,etc.A case study of a tilting pad bearing with 80 deg pad arc angle,0.5 offset was performed to illustrate the law of tile pendulum angle varies with eccentricity ratio and clearance ratio.It is revealed that,when the structural parameters of tilting pad bearing are constant,the tile pendulum angle increases first and then decreases with the original eccentricity ratio increases,and increases linearly with the increasing of bearing clearance ratio.%研究可倾瓦轴承瓦块摆动几何关系,基于分离变量法建立了有限长轴承油膜压力模型及瓦块力矩平衡方程,获得瓦块摆角与轴承参数之间的函数关系;以瓦块包角为80°、支点偏移量为0.5的四瓦块可倾瓦轴承为研究对象,计算分析其瓦块的摆动特性.理论推导表明,瓦块静平衡摆角只与瓦块结构参数、轴颈相对瓦块偏心率、间隙比有关,而与轴颈转速、油膜粘度等无关;数值仿真结果表明,当瓦块结构参数一定时,瓦块静平衡摆角随原始偏心率增大呈先增大后减小趋势,随轴承间隙比增大呈线性增加趋势.研究结果为建立工程实用的可倾瓦轴承非线性油膜力模型提供理论依据.

  17. The influence of Injection Pockets on the Performance of Tilting-Pad Thrust Bearings: Part II - Comparison Between Theory and Experiment

    DEFF Research Database (Denmark)

    Heinrichson, Niels; Fuerst, Axel; Santos, Ilmar

    2006-01-01

    This is Part II of a two-part series of papers describing the effects of high pressure injection pockets on the operating conditions of tilting-pad thrust bearings. Measurements of the distribution of pressure and oil film thickness are presented for tilting-pad thrust bearing pads of approximately...... large discrepancies exist for the pad with an injection pocket. It is argued that this is likely to be due to the unevenness of the collar surface. The measured and theoretical values of oil film thickness compare well at low loads. At high loads discrepancies grow to up to 25 %. It is argued...

  18. Linear and non-linear control techniques applied to actively lubricated journal bearings

    Science.gov (United States)

    Nicoletti, R.; Santos, I. F.

    2003-03-01

    The main objectives of actively lubricated bearings are the simultaneous reduction of wear and vibration between rotating and stationary machinery parts. For reducing wear and dissipating vibration energy until certain limits, one can use the conventional hydrodynamic lubrication. For further reduction of shaft vibrations one can use the active lubrication action, which is based on injecting pressurized oil into the bearing gap through orifices machined in the bearing sliding surface. The design and efficiency of some linear (PD, PI and PID) and a non-linear controller, applied to a tilting-pad journal bearing, are analysed and discussed. Important conclusions about the application of integral controllers, responsible for changing the rotor-bearing equilibrium position and consequently the "passive" oil film damping coefficients, are achieved. Numerical results show an effective vibration reduction of unbalance response of a rigid rotor, where the PD and the non-linear P controllers show better performance for the frequency range of study (0-80 Hz). The feasibility of eliminating rotor-bearing instabilities (phenomena of whirl) by using active lubrication is also investigated, illustrating clearly one of its most promising applications.

  19. Frequency Response Analysis of an Actively Lubricated Rotor/Tilting-Pad Bearing System

    DEFF Research Database (Denmark)

    Nicoletti, Rodrigo; Santos, Ilmar

    2004-01-01

    -pad bearing. By applying a simple proportional controller, it is possible to reach 30% reduction of the resonance peak associated with the first rigid body mode shape of the system. One of the most important consequences of such a vibration reduction in rotating machines is the feasibility of increasing...

  20. Feedback-Controlled Lubrication for Reducing the Lateral Vibration of Flexible Rotors supported by Tilting-Pad Journal Bearings

    DEFF Research Database (Denmark)

    Salazar, Jorge Andrés González; Santos, Ilmar

    2014-01-01

    , both the resulting pressure distribution over the pads and hence the bearing dynamic properties are dynamically modified. The control strategy is focused on reducing the system lateral vibration around its operational equilibrium position in a wide frequency range. For this purpose, servovalves......-controlled lubrication regime featured via PD controllers. Good experimental results are obtained, and a significant improvement of the flexible rotor-bearing system dynamic performance can be experimentally demonstrated....

  1. 基于CFD的可倾瓦轴承静动特性研究%Research on Tilting- pad Bearing Static and Dynamic Characteristic based on CFD

    Institute of Scientific and Technical Information of China (English)

    吕真; 张继革; 顾卫国

    2012-01-01

    目前对于可倾瓦轴承的静动特性研究方法,主要是先研究单块瓦片的特性,再通过瓦片子系统的叠加得到轴承整体特性,在计算中忽略了瓦间间隙及瓦块相互之间的流场影响.用瓦块独立计算模型模拟理论计算中只考虑轴瓦与轴颈间隙流场的情况,整体计算模型考虑轴承瓦间间隙的影响,在Fluent软件中计算两种模型的静动特性参数,并进行对比和分析.计算结果表明,瓦间间隙对轴承流场的影响不能忽略,尤其是在涉及温度场计算时,瓦块独立计算模型计算的结果与整体模型计算结果相差很大.%For now the research methods of tilting - pad bearing static and dynamic characteristics , the characteristics of single pad is mainly studied, and through the superposition of single pads characteristics bearing overall property is got, the method ignores the gap between pads. In simulation theoretical calculation with pad independent calculation model flow field situation between pads and journal is not considered. Static and dynamic characteristic parameters are calculated by Fluent software, in the whole calculation model in the influence of the gap between bearing pads is considered and compare the results are compared. The calculation results show that, the influence of gap between pads on flow field of the bearing can' t be ignored, especially involving the temperature field. The pad independent calculation model calculation results and the whole model calculation results are very different.

  2. Analysis and Improvement of Machining Technology of Tilting-pad Bearings%可倾瓦轴承体加工工艺分析与改进

    Institute of Scientific and Technical Information of China (English)

    徐纪高; 李艳

    2013-01-01

    Due to the impact of the material internal stress, a mid-split surface stagger and inner diameter roundness out-of-tolerance occurred after machining of the tilting-pad bearing, therefore the bearing pad clearance were not consistent after assembly. Through analyzing the deformation causes and adjusting the machining procedures and machining allowance for many times, the machining deformation problem is properly solved which not only satisfies the roundness tolerance requirements but also guarantees the pad clearance consistency of the tilting-pad bearing after assembly.%受材料内应力影响,可倾瓦轴承体加工后出现中分面错口、内径圆度超差现象,导致装配后轴瓦间隙不一致。经过分析变形原因、多次调整加工工序与加工余量,较好地解决了轴承体加工变形问题,满足了可倾瓦轴承体的圆度公差要求,保证了装配后可倾瓦轴承轴瓦间隙的一致性。

  3. Nonlinear Dynamic Response of Compliant Journal Bearings

    Directory of Open Access Journals (Sweden)

    Glavatskih S.

    2012-07-01

    Full Text Available This paper investigates the dynamic response of the compliant tilting pad journal bearings subjected to synchronous excitation. Bearing compliance is affected by the properties of pad liner and pad support geometry. Different unbalance eccentricities are considered. It is shown that bearing dynamic response is non-linear. Journal orbit complexity increases with pad compliance though the orbit amplitudes are marginally affected at low loads. At high loads, the journal is forced to operate outside the bearing clearance. The polymer liner reduces the maximum oil film pressure by a factor of 2 when compared to the white metal liner. The nonlinear dynamic response of compliant tilting pad journal bearings is thoroughly discussed.

  4. Control System Design for Active Lubrication with Theoretical and Experimental Examples

    DEFF Research Database (Denmark)

    Santos, Ilmar; Scalabrin, A.

    2003-01-01

    This work focuses on the theoretical and experimental behavior of rigid rotors controlled by tilting-pad journal bearings with active oil injection. Initially the mathematical model of the active bearing is presented: The equations that describe the dynamics of hydraulic actuators are introduced...... the control system of the active bearing based on root locus curves. The active system stability is analyzed by calculating its eigenvalues and frequency response curves. The theoretical and experimental results show that this kind of bearing can significantly reduce the vibration level of rotating...

  5. Influence of Flexible Deformation for Performance of Tilting-pad Bearing%弹性变形对可倾瓦轴承性能的影响

    Institute of Scientific and Technical Information of China (English)

    曹寒; 杨培平; 郭勇

    2016-01-01

    文章采用FORTRAN语言和有限元商用软件ANSYS混合编程的方法分析了支撑体和瓦块的双重弹性变形对可倾瓦轴承性能的影响。计算结果表明:在考虑支撑体和瓦块同时变形的情况下,进油量、摩擦系数和最小油膜厚度增加。%The thesis analyzed the influence imposed on the tilting-pad bearing’s performance of flexible deformation of pad support and pad by adopting FORTRAN language and finite element commercial software ANSYS mixed programming method. The research result showed that the oil inlet volume, friction coefficient and minimum oil film thickness were increased when the deformation of pad support and pad were considered at the same time.

  6. The Influence of Injection Pockets on the Performance of Tilting-Pad Thrust Bearings - Part II: Comparison Between Theory and Experiment

    DEFF Research Database (Denmark)

    Heinrichson, Niels; Fuerst, Axel; Santos, Ilmar

    2007-01-01

    This is Part II of a two-part series of papers describing the effects of high-pressure injection pockets on the operating conditions of tilting-pad thrust bearings. The paper has two main objectives. One is an experimental investigation of the influence of an oil injection pocket on the pressure...... distribution and oil film thickness. Two situations are analyzed: (i) when the high-pressure oil injection is turned off and (ii) when the highpressure injection is turned on. The other objective is to validate a numerical model with respect to its ability to predict the influence of such a pocket (with....... At the low load, the theoretical pressure distribution corresponds well with the measured values for both pads, although the influence of the pocket is slightly underestimated. At the high load, large discrepancies exist for the pad with an injection pocket. It is argued that the discrepancies are due mainly...

  7. Oil Film Force Model of Tilting Pad Bearing and Its Characteristic Analysis%可倾瓦轴承的油膜力模型及其特性分析

    Institute of Scientific and Technical Information of China (English)

    刘兴星; 孟再强; 李明; 李鸿光; 孟光

    2013-01-01

    A method to model the oil film force of tilting pad bearing and the torque of the pads was proposed. Influence of the pre-load, the covering angle and the swinging angle of the pad on the oil film force was analyzed with this model. The difference between the oil film forces of the ordinary sliding bearing and the tilting pad bearing was analyzed. Finally, the vibration characteristic of the tilting pad was studied by applying the model to the Jeffcott rotor with the use of the Runge-Kutta method. The result shows that this model is effective for analyzing the characteristic of the tilting pad bearing.%提出一种可倾瓦径向滑动轴承的油膜力模型以及可倾瓦瓦块的摆动方程,并使用该模型分析可倾瓦轴承的预载荷,包角,瓦块摆角等对油膜力的影响;分析可倾瓦轴承油膜力和普通轴承油膜力的区别。运用Runge-Kutta等方法将可倾瓦轴承油膜力模型应用于Jeffcott转子,分析轴承瓦块摆角的特性。分析结果表明模型的高效性和可倾瓦轴承的特性。

  8. The effect of damping on the stability of a finite element model of a flexible non-axisymmetric rotor on tilting pad bearings

    Science.gov (United States)

    Taylor, Anthony G.; Craggs, Anthony

    1995-09-01

    A finite element model of a rotor-bearing system with non-axisymmetric stiffness and mass properties was analyzed in a previous study. In this paper the model is extended to include the effects of external damping due to symmetrical tilting-pad bearings. The same instability mechanisms, due to the lack of axisymmetry and shear deflection occurred in the damped case as for the undamped case, but within the normal operating speed of typical industrial rotor systems, a quite high degree of asymmetry is necessary. A ratio of the difference in a diametral second moments of area to mean diametral second moment of area, greater than 0.3 is necessary for instability for the configuration modelled. The instabilities involving antisymmetric modes in the undamped case are not present in the damped case. The first backward mode is involved in the instabilities of most practical interest. The effect of internal damping is also examined for an axisymmetric rotor and the behaviour, involving instability of the first forward mode, compares well with purely analytical methods for simple rotors.

  9. 可倾瓦轴承支点静刚度的有限元分析%Finite Element Analysis of Stiffness of Tilting Pad Bearing Pivot

    Institute of Scientific and Technical Information of China (English)

    李萌萌; 王小静; 蒋登峰; 朱健申

    2015-01-01

    The stiffness of the tilting pad pivot will change when using different pivot forms,which will cause the change of the dynamic forces of the base transmitted by the bearing.The vertical static stiffness of tilting pad pivot was simulated and calculated for common pivot forms of point support,line support and ball support,and the relationship between the piv⁃ot forms and the static stiffness of pivot was analyzed.The results show that the vertical static stiffness of the point support is larger than that of the line support with the same diameter,and the vertical static stiffness of the line support is larger than that of the ball support.For line support, when the diameter of the semicircular surface of bearing seat is greater than that of the pad pivot,the vertical static stiffness will be significantly decreased,and the larger of the diameter of the semi⁃circular surface of bearing seat,the more obvious the decreasing of vertical static stiffness is.For ball support,when the di⁃ameter of the ball on the surface of pads is larger than that of the ball of pivot,the smaller the pivot ball diameter is,the more obvious of the decreasing of vertical static stiffness is.%可倾瓦块支点型式不同,支点的静刚度会发生变化,从而导致轴承传递到基础上的动态力发生变化。对常用的点支承、线支承、球支承等型式的可倾瓦径向滑动轴承的支点垂直静刚度进行仿真计算,分析支点型式与支点静刚度的关系。结果表明,相同直径的点支承的垂直静刚度大于线支承,而线支承的垂直静刚度大于球支承;当线支承的轴承座上的半圆面直径大于瓦块上支点的直径时,线支承的垂直静刚度会有明显的下降,并且轴承座的半圆面直径越大,刚度下降的现象越明显;当球支承的瓦块上的球窝面直径大于支点球径时,支点球径越小,刚度下降越明显。

  10. LINEAR STABILITY ANALYSIS OF TILTING-PAD JOURNAL BEARING SYSTEM%可倾瓦滑动轴承系统线性稳定性分析

    Institute of Scientific and Technical Information of China (English)

    乔广; 王丽萍; 郑铁生

    2007-01-01

    提出可倾瓦轴承系统解析模型并对其进行线性稳定性分析.采用Newton-Raphson和pad assembly这两种方法,可获得系统完整的动力特性系数.基于这些动力特性系数,建立系统的运动微分方程并进行复特征值分析,易求得用来检验系统稳定性的轴瓦临界质量和系统阻尼比.结果表明:预负荷、转速及支点位置均对可倾瓦轴承系统的稳定性有着较大的影响,合理选取这些参数有助于提高系统的稳定临界值.

  11. LEG可倾瓦径向轴承的特性分析%Analysis for the Characteristic of LEG Tilting Pad Journal Bearing

    Institute of Scientific and Technical Information of China (English)

    沈存五; 何建平; 张维桢

    2006-01-01

    介绍LEG可倾瓦径向轴承的结构特点,计算并分析LEG可倾瓦径向轴承的静特性和动特性,并对LEG可倾瓦径向轴承和浸润式可倾瓦径向轴承进行了比较,显示出应用直接润滑技术轴承的优越性.

  12. The Method and Calculation Model of Dynamic Performances of Oil-film of Tilting-pad Bearing%可倾瓦轴承动态特性计算模型及方法研究

    Institute of Scientific and Technical Information of China (English)

    纪峰; 袁小阳; 张宏涛; 席文奎

    2012-01-01

    Tilting-pad bearing system is currently widely used in rotating machinery due to good vibration characteristics and high stability. However,because of the swing of tilting-pad bearing pad,increasing the systems degrees of freedom,so the modeling and calculation methods of tilting-pad bearing linear dynamic systems are much more complex than the fixed pad bearings. According to the different modeling approaches,the calculation of model tilting-watt is divided into three types, including regular eight factor model, frequency-dependent eight coefficient model, the full dynamic factor model. In this paper,the introduction of a large tilting-pad bearing unit for the study,dynamic characteristics of tilting-pad bearing three kinds of calculation models and methods have been studied,and the bearing in excluding thermo-elastic deformation and not consider thermoplastic effect,dynamic characteristics of conventional eight coefficients were calculated,while model of the frequency-dependent eight coefficient were analyzed and calculated. The results showed that; It is expected to assume a higher model accuracy, consider the thermoplastic deformation of the pad tilting-pad bearing dynamic coefficients of high accuracy,Cancel model of the same assumptions of tile beat frequency and rotor frequency transfer.%可倾瓦轴承由于具有良好的制振性及高稳定性等特征,目前被广泛应用于各种旋转机械.但由于可倾瓦轴承瓦块的摆动性,增加了系统的自由度,所以可倾瓦轴承线性动力系统的建模及计算方法较之固定瓦轴承要复杂的多.根据建模方法的不同,可倾瓦计算模型主要分为常规八系数模型、频变八系数模型、完整动力学系数模型3种.结合某引进机组大型可倾瓦轴承为研究对象,对可倾瓦轴承动态特性3种计算模型及方法进行了研究.并对计算中不计热弹变形及考虑热弹耦合效应下的轴承常规八系数动特性进行了计算,并对频变八

  13. 运转参数对可倾瓦轴承油膜特性的影响%Effect of Operating Conditions on Oil Film Properties of Steam Turbine Tilting Pad Bearings

    Institute of Scientific and Technical Information of China (English)

    张艾萍; 李刚; 党翠

    2014-01-01

    In order to determine the impact of operating conditions on the oil film characteristics of turbine tilting pad bearing when steam turbine is running,with four watts tilting pad bearings as an example,the model was set up using Pro/E.Based on three-dimensional SST turbulence model,considering the effect of tile gap and the mutual effect between tiles, the influence of oil inlet pressure,oil inlet temperature,eccentricity and shaft rotation speed on the oil film characteristics of four watts tilting pad bearings was simulated using ANSYS.The results show that the oil inlet pressure has less effect on the oil film properties,while the oil inlet temperature,eccentricity and shaft rotation speed have great influence the oil film characteristics.These three parameters should be strictly monitored during the running of steam turbine.%为了确定汽轮机运行时运转参数对汽轮机可倾瓦轴承油膜特性的影响,以四瓦可倾瓦轴承为例,采用Pro/E建模,选用湍流SST三维模型,考虑到瓦块间隙及瓦块相互之间的影响,采用ANSYS模拟出进口油压、进口油温、偏心距、轴颈转速对四瓦可倾瓦轴承油膜特性的影响。结果表明:进口油压对油膜特性影响较小,进油温度、轴颈偏心距、轴颈转速对汽轮机可倾瓦油膜特性影响较大,故在运行中应严格监控这3个参数。

  14. Analysis and Treatment for the Tilting Pad Bearing Overheating Problem in Single Stage Overhang Centrifugal Compressor Unit%单级悬臂压缩机组可倾瓦轴承超温问题分析及处理

    Institute of Scientific and Technical Information of China (English)

    杨培基; 杜国栋; 杨岐平; 袁奇

    2015-01-01

    The paper systematically analyzes the reasons of tilting pad bearing overheating problem in the high speed axial impeller and presents solutions, which occurred in trial run of single-stage overhang centrifugal compressor unit. Through the study of the unit operation conditions, the phenomenon of the tilting pad bearing overheating issues were summarized, the reasons were analyzed and the feasible solutions were proposed. The result shows that the single-stage overhang unit overheating issue can be resolved effectively by this solution. Meanwhile, it can be used for the reference to the tilting pad bearing overheating in the other field application.%针对某单级悬臂压缩机组在试车过程中高速轴叶轮端可倾瓦轴承出现的超温问题,系统分析了原因并给出了解决方案。通过研究该机组试车时的运行情况,总结了机组高速轴叶轮端可倾瓦轴承超温问题的现象,系统分析了超温问题的原因,给出了可行的处理方案。运行结果表明:采用该处理方案可以有效的解决单级悬臂机组的超温问题,对其它领域应用的可倾瓦轴承超温问题有借鉴意义。

  15. 预负荷调整在可倾瓦轴承不稳定振动处理中的应用%Application of Preload Factor to Eliminating Unstable Vibration of Tilting Pad Bearings

    Institute of Scientific and Technical Information of China (English)

    何国安; 常屹; 张学延; 唐任宗

    2012-01-01

    大容量汽轮发电机组中常采用可倾瓦轴承,实际运行中常常出现不稳定的强迫振动和油膜涡动.针对现场屡屡出现的可倾瓦轴承不稳定振动问题,采用有限差分结合法,分析了预负荷系数对可倾瓦轴承的油膜刚度、油膜阻尼、温升等性能参数的影响,得出了可倾瓦轴承的相关性能参数随预负荷系数而变化的一系列规律性结论,并成功应用于实践.结果表明:通过轴承预负荷的调整,可有效消除可倾瓦轴承的不稳定振动故障.%Tilting pad bearings are commonly adopted by large turbo-generator units, but unstable forced vibration and oil film whirling often happen to them in practical operation. For solving the unstable vibration of tilting pad bearings, the influences of the preload factor on the oil film stiffness coefficient, damping coefficient and temperature rise are studied with the finite difference method. The study discovers the relationship between the performance of the bearings and the preload factor. With the adjustment of preload factor, the unstable vibration fault of tilting pad bearings is eliminated.

  16. Experimental Investigation into Dynamic Characteristics of Tilting Pad Bearing with Leading Edge Groove%前缘沟槽型可倾瓦轴承动态特性的试验研究

    Institute of Scientific and Technical Information of China (English)

    李伟光; 杨期江; 蒙启泳; 彭喆; 罗健彬; 赵伟; 骆稢行

    2015-01-01

    Firstly,according to the lubrication characteristics of tilting pad bearing,a novel three-pad tilting pad bearing with leading edge groove (LEG)was proposed.Secondly,in order to obtain the test parameters of the bearing,a dynamic performance test rig with the functions of automatic data acquisition and real-time data analysis was developed.Then,the temperature characteristics of flooded bearing and LEG bearing were analyzed in a com-parison way,and eight dynamic parameters of tilting pad bearing were obtained respectively via finite difference al-gorithm and frequency sweep excitation test.Finally,the effectiveness of the proposed test method was verified by a comparison between the theoretical results and the test ones.It is found that the developed bearing is of good tem-perature,stiffness and damping characteristics.%针对可倾瓦轴承润滑的特征,开发了一种新型前缘沟槽型(LEG)三瓦可倾瓦轴承;为获取该可倾瓦轴承的试验参数,研制了一套具有自动采集数据、实时分析数据等功能的可倾瓦轴承动态特性测试试验台;对比分析了浸润式滑动轴承与前缘沟槽型滑动轴承的轴瓦温度特性;采用有限差分算法理论计算了该轴承的动态特性参数,采用扫频激振方法试验研究了该轴承的8个动态特性参数,并通过对比分析理论计算与试验结果验证了试验方法的有效性。研究表明,所开发的滑动轴承具有较好的温度特性及刚度阻尼特性。

  17. 计入三维热效应对可倾瓦推力轴承动力特性的影响%Influence of Considering 3D Thermal Effects on Dynamic Characteristics of Tilting Pad Thrust Bearing

    Institute of Scientific and Technical Information of China (English)

    何加猛; 王小静; 祁高安; 黄敏

    2012-01-01

    在考虑三维热效应的情况下,研究线支撑可倾瓦推力轴承的动力特性.建立广义雷诺方程、完整的三维能量方程、瓦体的热传导方程和温粘关系,联立求解非线性偏微分方程组,计算油膜的刚度和阻尼系数.研究表明:温度变化对可倾瓦推力轴承的动力特性有较大影响;与不计入热效应的线支撑可倾瓦推力轴承相比,计入三维热流体的可倾瓦推力轴承的油膜刚度和阻尼系数会增大,其理论计算结果更接近实际工况;随着载荷、入口温度的增加以及转速的减小,油膜的刚度和阻尼也会随之增大.%The dynamic characteristics of the line-supported tilting pad thrust bearing are studied by taking thermal effects into account. The generalized Reynolds equation, the complete 3D energy equation, the heat conduction equation of the pad, and the temperature viscosity relation are established to derive the stiffness and damping coefficient of the oil film on the tilting pad. It is shown that the thermal effects have significant influence on the dynamic characteristics of tilting thrust pads. Compared to the line-supported tilting pad without including the thermal effect, stiffness and damping coefficient of the oil film including the thermal effect increases so that it becomes closer to the actual operating conditions. With the increase of load and inlet temperature and the decrease of angular velocity, stiffness and the damping coefficient of the oil film will increase.

  18. 350MW级蓄能机组可倾瓦导轴承流体动力润滑计算%Calculation of hydrodynamic lubrication of tilting pad guide bearing for 350 MW pumped-storage units

    Institute of Scientific and Technical Information of China (English)

    范寿孝; 全日光; 朱亲林

    2015-01-01

    为了解决大型抽水蓄能机组可倾瓦导轴承性能计算的问题,笔者根据流体润滑理论,建立了大型可倾瓦导轴承的流体动力润滑数学模型,设计了计算程序,并以此程序对某350 MW级抽水蓄能机组的导轴承润滑性能进行了计算分析和研究.其结果表明,大型可倾瓦导轴承的流体动力润滑计算程序运行稳定可靠,导轴承的动力润滑性能会受到轴承负荷、机组转速、油槽进油温度等因素的影响,最高油膜温度、最小油膜厚度是制约轴承运行工况参数变化范围的关键因素.%In order to solve the calculation problem of the tilting pad guide bearing for large pumped-storage u-nits, according to hydro lubricating theory, the author established the hydrodynamic lubricating mathematical model of the tilting pad guide bearing and analyzed and studies the hydrodynamic lubrication of a 350 MW pumped-stor-age unit by the designed calculation program. The result shows that the calculation program operates stably and reli-ably. Besides, the lubricating character of guide bearing is affected by factors including bearing load, unit speed and inlet oil temperature of oil tank. The maximum oil film temperature and the minimum oil film thickness become the critical factor restricting the variation range of operating parameters.

  19. Analysis of Oil Film Boundary Conditions of Tilting Pad Bearing Based on a Geometrical Model%基于几何条件的可倾瓦轴承油膜边界条件判定方法

    Institute of Scientific and Technical Information of China (English)

    季超; 荆建平; 陈昌敏

    2015-01-01

    The geometric model describing the boundary conditions of tilting-pad bearings was studied. The coupling effect of the shaft axis, pad center and bearing center locations was analyzed to solve the Reynolds equation and analyze the film pressure distribution by means of finite difference method. Theoretical derivation indicates that the position of each pad is determined by preset parameters and the location of shaft center only. Numerical results show that the bearing capacity increases with the increase of the eccentricity ratio. A case study demonstrates that once the shaft center location is determined, the angle of displacement and the eccentricity ratio can be determined correspondingly, thus the dynamic equation of each pad can be solved. The feasibility law of the boundary conditions has been established, which provides a theoretical basis for the modeling of tilting pad bearings.%针对可倾瓦轴承的雷诺方程,基于瓦块几何模型获得各个瓦块的边界条件,利用轴心、各瓦块中心与轴承之间的耦合关系,采用有限差分法计算分析油膜压力的分布。理论推导表明,瓦块的位置仅由瓦块预置参数、轴心的位置决定;数值结果表明,轴承的承载力随偏心率增大呈增大趋势。结合具体算例看出,当轴颈位置确定时,可确定各瓦块实际偏位角和偏心率,进而可对各瓦块方程分别进行求解。建立一种可行的边界条件确定法则,为可倾瓦轴承的建模提供了理论依据。

  20. Calculation and Analysis on Gas Film Thickness of Tilting-Pad Gas Bearings%可倾瓦气体轴承气膜厚度的计算和分析

    Institute of Scientific and Technical Information of China (English)

    程进杰; 孙郁; 孙立佳; 季伟; 张武

    2014-01-01

    The effects of centrifugal deformation,thermal deformation,bearing misalignment and roughness on tilting pad gas bearings are analyzed.The results show that centrifugal deformation has greater influence on hollow shaft;ther-mal deformation less influence on pad thickness and greater influence on its nominal radius shaft radius;bearing mis-alignment effect its operation safety and roughness is able to increase the minimum gas film thickness.%研究了离心力变形、热变形、轴承偏斜以及表面粗糙度对可倾瓦气体轴承的影响,结果表明:离心力变形对空心轴影响较大,温升对轴瓦厚度影响较小,而对其名义半径和轴半径影响较大;轴承偏斜影响其安全运行;表面粗糙度也会增大最小气膜厚度。

  1. Determination of Oil-inlet Boundary Condition of Circular Tilt-pad Thrust Bearing%圆形可倾瓦推力轴承入油边界条件的确定

    Institute of Scientific and Technical Information of China (English)

    马希直; 徐华; 朱均

    2001-01-01

    采用有限元法对Reynolds方程、能量方程及弹性方程进行了联立求解,通过计算瓦边法向平均速度,较精确地确定了瓦的入油边界条件,从而更精确地计算出圆形瓦的压力分布及温度分布.通过轴承试验台试验发现,计算结果和实验结果较吻合.%The Reynolds equation, energy equation and elastic equation of acircular tilt-pad thrust bearing were solved by using finite element methods. The oil-inlet boundary condition of the bearing was determined by calculation of the normal velocity on the edge of the pad. Thus the pressure distribution and temperature distribution were determined more accurately. It has been found that the calculated results agree well with the ones obtained on a bearing bench test rig.

  2. Adjustable ETHD lubrication applied to the improvement of dynamic performance of flexible rotors supported by active TPJB

    DEFF Research Database (Denmark)

    Salazar, Jorge Andrés González; Cerda Varela, Alejandro Javier; Santos, Ilmar

    2013-01-01

    This paper reports the dynamic study of a flexible rotor-bearing test rig which resembles a large overhung centrifugal compressor. The rotor is supported by an active tilting pad journal bearing (TPJB) able to perform the adjustable lubrication regime. Such a regime is obtained by injecting...... the full dynamic coefficients matrices obtained by an Elasto-Thermo-Hydrodynamic (ETHD) model of the TPJB. Theoretical results are presented in Campbell diagram, stability map, mode shapes and frequency response functions (FRFs). The experimental FRFs and the modal parameters of the test rig are also...... obtained and compared against the theoretical results. The main contribution of this work is to present theoretically and experimentally the feasibility of modifying the dynamic performance of the test rig by means of the adjustable ETHD lubrication. Fair agreements between the theoretical...

  3. 瓦块固有频率对可倾瓦轴承频变刚度的影响%Effect of Pad Natural Frequency on Frequency-variation Stiffness of Tilting Pad Bearings

    Institute of Scientific and Technical Information of China (English)

    洪红伦; 许吉敏; 陈润霖; 张帆; 吴立明; 袁小阳

    2016-01-01

    为研究轻载工况下可倾瓦块固有频率和振动频率对轴承刚度的影响,基于长轴承理论建立求解可倾瓦推力轴承瓦块固有频率和频变刚度的润滑和动力学耦合模型,推导润滑模型的解析解和频变动力学特性的表达式,并通过实例计算分析载荷、支点系数(瓦进油边到支点的距离与瓦长的比值)、瓦块转动惯量等结构参数对瓦块固有频率和频变刚度的影响。结果表明:瓦块的惯性、油膜的刚度和阻尼共同决定瓦块振动的固有频率,瓦块在固有频率附近振动可以使轴承的频变刚度出现负值,甚至正负无穷大;小载荷的瓦(如非承载瓦)容易出现瓦块振动频率接近其固有频率的状况,使瓦发生共振;可倾瓦轴承设计中有必要考虑瓦块的固有频率和频变刚度来设计非承载瓦的支点系数和转动惯量,使瓦块的振动频率跨过固有频率而产生大的刚度。%In order to research the effect of natural frequency and vibration frequency of pad on stiffness of tilting⁃pad bearing,lubrication and dynamic coupling model based on long bearing theory was established to solve natural frequency and frequency⁃variation stiffness of pad in tilting pad thrust bearing.Analytical solution of this lubrication model and formulae of frequency⁃variation dynamic characteristics were deduced,and the influence of load,pivot coefficient ( Ratio of the distance between oil inlet and pivot to the pad length) ,rotational inertia and other structural parameters on natural frequency and fre⁃quency⁃variation stiffness were analyzed through example calculation.The results show that vibration natural frequency of tilt⁃ing pad is codetermined by inertia,stiffness and damping of oil film.When the vibration frequency of pad is close to its natu⁃ral frequency,frequency⁃variation stiffness of bearing presents negative value even with positive and negative infinite.The sit

  4. 轴线偏斜对可倾瓦推力轴承润滑性能的影响%Effect of Misalignment on Thermal Elastohydrodynamic Lubrication of Tilting-pad Thrust Bearing

    Institute of Scientific and Technical Information of China (English)

    蒋秀龙; 汪久根

    2011-01-01

    轴偏斜是实际运行推力滑动轴承中普遍存在的现象,轴心线的偏斜是造成推力轴承失效的主要因为之一.建立可倾瓦推力滑动轴承弹性流体动压润滑的计算模型,计算5组不同轴偏斜角下的轴承润滑性能,并将其与未偏斜时的润滑性能作对比.结果表明,轴偏斜造成每块瓦的油膜厚度、压力分布、瓦面温度均不相同,其中对油膜厚度、压力分布影响很大,对瓦面温度分布影响较小;在全膜润滑状态下,微小的偏斜角变化会造成最小油膜厚度和最大压力明显的变化,但瓦面最高温度变化很小.%The misalignment of axis of the bearing shaft exists in the practical operation of thrust bearings ,and it is one of the major causes that induce the failure of thrust bearings. A theoretical model of the thermal elastohydrodynamic lubrication for tilting-pad thrust bearings was established,and five cases was calculated to examine the effects of misalignment on the performances of those bearings. Compared with the results of exactly alignment case, the present results show that misalignment of shaft results in the differences of oil film thickness, hydrodynamic pressure and temperature of the pad surface of different pads,and shaft misalignment has significant influences on film thickness and hydrodynamic pressure,but less effects on pad surface temperature;and that a small change of the misalignment angle yields distinct variations of minimum film thickness and maximum hydrodynamic pressure, however, a little change of the maximum pad temperature, for the thrust bearings under flood lubrication.

  5. Experimental Investigation on the Dynamic Properties of Tilting Pad Journal Bearing%四瓦可倾瓦径向滑动轴承动力特性的实验研究

    Institute of Scientific and Technical Information of China (English)

    徐华; 姜歌东; 丛红; 谢友柏; 王凤才

    2001-01-01

    采用在线分析方法考察了300MW汽轮发电机组可倾瓦轴承的静、动力特性,探讨了载荷、轴颈转速以及动态激振力频率等参数变化对可倾瓦轴承的静、动态性能的影响.比较试验结果与理论计算结果发现,在不同频率激振力作用下,理论计算所得到的可倾瓦轴承动特性参数与试验结果有较大的差异.

  6. Analysis of the Transient Response of Rotor-Tilting-Pad Journal Bearing-Elastic Foundation Coupling System%转子-滑动轴承-弹性基础耦合系统瞬态响应分析

    Institute of Scientific and Technical Information of China (English)

    戴俊; 郭伟; 陈长盛; 李国平; 章艺

    2014-01-01

    建立了一种转子-滑动轴承-弹性基础耦合系统瞬态响应的分析模型,以可倾瓦径向滑动轴承支持系统为例,考虑了轴颈涡动对轴承动特性的影响,将转子振动和轴承动态油膜分布耦合求解,并计入温度、流态变化对轴承动特性的影响,分析了外载荷、节点位置及弹性基础的刚度阻尼对系统瞬态响应的影响规律.

  7. 可倾瓦径向滑动轴承油膜动特性实验测试%An Experimental Test of the Dynamic Characteristics of Tilting-pad Journal Bearings

    Institute of Scientific and Technical Information of China (English)

    孙云昊; 金健; 吴兵; 臧春阳; 王小静

    2014-01-01

    为了研究可倾瓦径向滑动轴承的油膜动特性,提出一种可倾瓦径向滑动轴承油膜动力特性(油膜刚度系数和阻尼系数)的实验测试方法.利用振动理论建立系统动力学模型,根据实验测得的绝对位移和相对位移信号计算出油膜的动特性系数.实验结果表明,该方法能够排除噪声信号的干扰,具有较高的测试精度,而且简化了计算过程.

  8. TEHL ANALYSIS OF TILTING-PAD JOURNAL BEARINGS WITH NEWTON-RAPHSON METHOD%径向可倾瓦轴承的热弹流润滑分析

    Institute of Scientific and Technical Information of China (English)

    常秋英; 孟永钢; 温诗铸; 杨沛然

    2002-01-01

    用Newton-Raphson法一次性求出了所有瓦块的压力分布和轴心的位置,用步进扫描法对轴承进行了三维温度场分析,用20节点有限元法构造了瓦块的压力变形矩阵和热变形矩阵 .

  9. Inlet Pressure Effects on the Static and Dynamic Characteristics of Tilting-pad Journal Bearing%进油压力对可倾瓦径向滑动轴承静动特性的影响

    Institute of Scientific and Technical Information of China (English)

    赵三星; 戴旭东; 徐华; 朱均

    2001-01-01

    本文研究了进油压力对可倾瓦径向滑动轴承静动特性的影响.采用适当的边界条件,得到轴承的油膜压力分布和压力偏导数分布,进而得到轴承的静动特性系数.本文对不同的供油压力,计算可倾瓦轴承的静动特性,并对计算结果进行分析比较.结果显示:进油压力对可倾瓦径向滑动轴承的静动特性具有重要影响.

  10. Analysis of graphic representations of activity theory in international journals

    Directory of Open Access Journals (Sweden)

    Marco André Mazzarotto

    2016-05-01

    Full Text Available Activity theory is a relevant framework for the Design field, and their graphic representations are cognitive artifacts that aid the understanding, use and communication of this theory. However, there is a lack of consistency around the graphics and labels used in these representations. Based on this, the aim of this study was to identify, analyze and evaluate these differences and propose a representation that aims to be more suitable for the theory. For this, uses as method a literature review based on Engeström (2001 and its three generations of visual models, combined with graphical analysis of representations collected in a hundred papers from international journals.

  11. Theoretical and Experimental Study on the Dynamic Characteristics of Tilting Pad Thrust Bearing Considering Excitation Frequency%考虑激振频率的可倾瓦推力轴承动特性理论与试验研究

    Institute of Scientific and Technical Information of China (English)

    张青雷; 高孟雪; 徐华; 付玉敏; 段建国

    2014-01-01

    为了研究激振频率对可倾瓦推力轴承动特性的影响,提出考虑激振频率的动特性建模方法和试验方法。依据可倾瓦轴承刚度和阻尼定义,将激振频率引入可倾瓦推力轴承动特性计算过程,通过建立轴向扰动下的膜厚方程、雷诺方程及瓦块运动方程,推导出包含激振频率的可倾瓦推力轴承动特性数学模型,计算分析刚度和阻尼随扰动频率(激振频率与主轴转频的比值)、转速及载荷的变化规律;采用脉冲激振法在可倾瓦推力轴承试验台进行动特性试验,得到不同激振频率、转速及载荷条件下刚度、阻尼的试验结果,并和相应的理论计算值进行对比分析。结果表明:当扰动频率较小时,可倾瓦推力轴承刚度随其增加而逐步增大,阻尼随其增加而逐步减小;当扰动频率增加到一定程度后,其刚度和阻尼逐步趋于稳定。此外,转速和载荷对其刚度和阻尼随扰动频率的变化幅度基本无影响。%A modeling and testing method of dynamic characteristics considering excitation frequency of tilting pad trust bearing are proposed to study the effect of the excitation frequency on its dynamic characteristics. The excitation frequency is introduced into calculation process of dynamic coefficients of tilting pad thrust bearing according to the definition of stiffness and damping of tilting pad bearings. The mathematical model of its dynamic characteristics containing excitation frequency is deduced through establishing fluid film thickness equation, Reynolds equation and equation of tile motion under the condition of axial disturbance. The variation of stiffness and damping with perturbation frequency, that is, the ratio of excitation frequency to spindle rotation frequency, speed and load are analyzed. Test results of stiffness and damping in different excitation frequency, rotation speeds and loads are obtained in the test rig of tilting pad

  12. Active control of multi-input hydraulic journal bearing system

    Science.gov (United States)

    Chuang, Jen-Chen; Chen, Chi-Yin; Tu, Jia-Ying

    2016-09-01

    Because of the advantages of high accuracy, high capacity, and low friction, the development of hydrostatic bearing for machine tool receives significant attention in the last decades. The mechanics and mechanical design of hydrostatic journal bearing with capillary restrictors has been discussed in literature. However, pragmatically, the undesired loading effects of cutting force tend to result in resonance and instability of the rotor and damage the shaft during operation. Therefore, multi-input, active flow control using state feedback design is proposed in this paper. To this purpose, the proportional pressure valves are added to the hydraulic system as active control devices, and the linearised models of the bearing and valve are discussed and identified. Simulation and experimental work is conducted to verify the proposed active control and parameter identification techniques. The results show that the unbalance responses of the rotor are reduced by the proposed state feedback controller, which is able to regulate the flow pressure effectively, thus enhancing the stability and accuracy of the hydraulic journal bearing.

  13. Actively Engaging Middle Level Students with Photo Journals

    Science.gov (United States)

    Shankar-Brown, Rajni

    2011-01-01

    The author describes the implementation of a photo journal project and explains how it positively impacted diverse young adolescents, specifically three reluctant learners. In addition to increasing motivation and engagement in learning, the photo journal project built community in the classroom. This article shares practical ideas for…

  14. Beyond usage: understanding the use of electronic journals on the basis of information activity analysis. Electronic journals, Use studies, Information activity, Scientific communication

    Directory of Open Access Journals (Sweden)

    Annaïg Mahé

    2004-01-01

    Full Text Available In this article, which reports the second part of a two-part study of the use of electronic journals by researchers in two French research institutions, we attempt to explain the integration of the use of electronic journals in the scientists' information habits, going beyond usage analysis. First, we describe how the development of electronic journals use follows a three-phase innovation process - research-development, first uses, and technical acculturation. Then, we attempt to find more significant explanatory factors, and emphasis is placed on the wider context of information activity. Three main information activity types are outlined - marginal, parallel, and integrated. Each of these types corresponds to a particular attitude towards scientific information and to different levels of electronic journal use.

  15. Journal and Wave Bearing Impedance Calculation Software

    Science.gov (United States)

    Hanford, Amanda; Campbell, Robert

    2012-01-01

    The wave bearing software suite is a MALTA application that computes bearing properties for user-specified wave bearing conditions, as well as plain journal bearings. Wave bearings are fluid film journal bearings with multi-lobed wave patterns around the circumference of the bearing surface. In this software suite, the dynamic coefficients are outputted in a way for easy implementation in a finite element model used in rotor dynamics analysis. The software has a graphical user interface (GUI) for inputting bearing geometry parameters, and uses MATLAB s structure interface for ease of interpreting data. This innovation was developed to provide the stiffness and damping components of wave bearing impedances. The computational method for computing bearing coefficients was originally designed for plain journal bearings and tilting pad bearings. Modifications to include a wave bearing profile consisted of changing the film thickness profile given by an equation, and writing an algorithm to locate the integration limits for each fluid region. Careful consideration was needed to implement the correct integration limits while computing the dynamic coefficients, depending on the form of the input/output variables specified in the algorithm.

  16. Feasibility of Applying Active Lubrication to Reduce Vibration in Industrial Compressors

    DEFF Research Database (Denmark)

    Santos, Ilmar; Nicoletti, Rodrigo; Scalabrin, A.

    2004-01-01

    the orifices distributed over the sliding surface. The dynamic coefficients of tilting-pad bearings with and without active lubrication and their influence on an industrial compressor of 391 Kg, which operates with a maximum speed of 10,200 rpm, are analyzed. In the original compressor design, the...... bearing housings are mounted on squeeze-film dampers in order to ensure reasonable stability margins during full load condition (high maximum continuous speed). Instead of having a combination of tilting-pad bearings and squeeze-film dampers, another design solution is proposed and theoretically......In this paper the complete set of modified Reynolds´ equations for the active lubrication is presented. The solution of such a set of equations allows the determination of stiffness and damping coefficients of actively lubricated bearings. These coefficients are not just dependent on Sommerfeld...

  17. The Participation Framework as a Mediating Tool in Kindergarten Journal Writing Activity

    OpenAIRE

    Larson, Joanne

    1996-01-01

    Drawing on data collected in an ethnographic study of kindergarten journal writing activity, this article demonstrates how students who are not directly participating in instruction are nevertheless key contributors to the social construction of literacy knowledge. More specifically, this study examines how the participation framework of writing activity constitutes and is constituted by the context for learning to write. Five interconnected roles in the participation framework are identified...

  18. Active lubrication applied to radial gas journal bearings. Part 1: Modeling

    DEFF Research Database (Denmark)

    Morosi, Stefano; Santos, Ilmar

    2011-01-01

    Active bearings represent a mechatronic answer to the growing industrial need to high performance turbomachinery. The present contribution aims at demonstrate the feasibility of applying active lubrication to gas journal bearings. The principle of operation is to generate active forces...... by regulating radial injection of lubricant through the means of piezoelectric actuators mounted on the back of the bearing sleeves. A feedback law is used to couple the dynamic of a simplified rotor-bearing system with the pneumatic and dynamic characteristics of a piezoelectric actuated valve system. Selected...... examples show the considerable performance advantages of such new kind of bearing....

  19. Journals and CPD.

    Science.gov (United States)

    Bryson, David

    2016-01-01

    One of the significant tools for supporting continuing professional development (CPD) is the Institute of Medical Illustrators (IMI) owned publication the Journal of Visual Communication in Medicine. Other journals, for example the Journal of Biological Photography, The British Journal of Photography, British Medical Journal and specialist journals associated with specific areas of medicine, education and illustration, are also helpful. The aim of this paper is to look at journals and CPD together with activities to help you engage with current literature, practice and research. If you look at the examples of CPD activities suggested by both IMI and the Health Professions Council (HPC) one of the recurring themes is the role of journals ( Table 1 ). Journals, alongside conferences, regional and national meetings, are key means of dissemination of research and support for professional development. [Table: see text]. PMID:27253077

  20. Experimental Analysis on Characteristics of the Rotor System Supported by Tilting-pad Journal Bearing Considering Pivot Stiffness and Damping%支点弹性、阻尼可倾瓦轴承转子系统性能的试验分析

    Institute of Scientific and Technical Information of China (English)

    陈朱杰; 刘思涌; 郑铁生

    2014-01-01

    制备了一种实现支点弹性和阻尼的新型可倾瓦轴承,在瓦块支点与轴承体之间设置了弹性垫片,使瓦块的支点支撑在弹性垫片上,弹性垫片与轴承体之间有微小间隙,与轴承润滑共享供油槽以实现局部挤压油膜效应,并在模拟真实透平压缩机尺度的转子振动试验台上开展试验研究.试验结果表明,通过加装此垫片能够增大转子的1阶临界阻尼,有效提高转子系统的稳定性.

  1. Stability and coupling dynamic behavior of nonlinear journal active electromagnetic bearing rotor system

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    The stability and coupling dynamic behavior of a journal active electromagnetic bearing rotor system are analyzed.The gyroscopic effect is considered in the rotor model.The system equations are formulated by combining equations for rotor motion and decentralized proportional integral differential (PID) controllers.A method combining the predictor-corrector mechanism and the Netwon-Raphson method is presented to calculate the critical speed at the corresponding Hopf bifurcation point of the system.For periodic motions,a continuation method combining the predictor-corrector mechanism and shooting method is presented.Non-linear unbalanced periodic motions and their stability margins are obtained using the shooting method and established continuation method for periodic motions.With the change of control parameters,the system local stability and bifurcation behaviors are obtained using the Floquet theory.The numerical examples show that the schemes not only significantly save computing cost,but also have high precision.

  2. Journals Abroad

    Science.gov (United States)

    Ando, Shoichi

    1975-01-01

    This article summarizes four journal articles on language teaching appearing in the American pedagogical language journals, "The Modern Language Journal,""English Language Teaching Journal," and "TESOL Quarterly." The purpose is to give an indication of what kinds of articles can be found in journals outside Japan. (Text is in Japanese.) (TL)

  3. The impact of e-journal access on DocDel Service activities

    OpenAIRE

    Spina, Barbara; Balducci, Antonio; Dellisanti, Domenico; Rodi, Eleonora; Orrù, Beniamino

    2004-01-01

    The rise of the first e-journal is a much debated question, however it is placed around 1990. They originally started as products in textual format sent by e-mail by specialised newsgroups in the technical-scientific field and in the biomedical area. In 1992, the first e-journal appeared on the Web and in 1997 publishers began to issue them at first in the Postscript or PCI formats and then in the more practical PDF format [1]. Over last few years electronic journals have become an important ...

  4. From Journals

    Directory of Open Access Journals (Sweden)

    Nedjeljko Frančula

    2013-06-01

    : Cartopolitics, geopolitics and boundaries in the Arctic, 2012, 4.International Journal of Geographical Information Science (CC, SCIE, SSCI (12H. Fan, L. Meng: A three-step approach of simplifying 3D buildings modeled by CityGML, 2012, 6.D. Hardy, J. Frew, M. F. Goodchild: Volunteered geographic information production as a spatial process, 2012, 7.P. Taillandier, J. Gaffuri: Improving map generalisation with new pruning heuristics, 2012, 7.ISPRS International Journal of Geo-Informationhttp://www.mdpi.com/journal/ijgiP. Neis, A. Zipf: Analyzing the contributor activity of a volunteered geographic information project — The case of OpenStreetMap, 2012, 2.P. Neis, M. Goetz, A. Zipf: Towards automatic vandalism detection in OpenStreetMap, 2012, 3.ISPRS Journal of Photogrammetry and Remote Sensing (CC, SCIEhttp://www.sciencedirect.com/science/journal/09242716J-H. Haunert: A symmetry detector for map generalization and urban-space analysis, Vol. 74, November 2012.Journal of Historical Geography (CC, SSC (12D. Fedman, C. Karacas: A cartographic fade to black: mapping the destruction of urban Japan during World War II, 2012, 3.M. Yilmaz: Historical mosque orientation in Turkey: Central-Western Anatolia Region, 1150‒1590, 2012, 4.Landscape Ecology (CC, SCIEhttp://link.springer.com/journal/10980J. Liang: Mapping large-scale forest dynamics: a geospatial approach, 2012, 8.Naše morehttp://hrcak.srce.hr/nase-moreI. Pavić: Geografsko-informacijski sus­tav i model razvoja pomorskoga ka­tastra, 2012, 5-6.Remote Sensing of Environment (CC, SCIEN. Levin, A. Heimowitz: Mapping spatial and temporal patterns of Mediterranean wildfires from MODIS, Vol. 126 November 2012.Tehnički vjesnik (SCIEhttp://hrcak.srce.hr/tehnicki-vjesnik R. Župan, D. Sruk, S. Frangeš: Experiment for determination of map graphics segment standard for handheld crisis maps management, 2012, 4.URISA Journalhttp://www.urisa.org/PSS_journal_archivesM. Martin, B. Peters, J. Corbett: Participatory asset mapping in the Lake

  5. Political economy of the Kenyan media - towards a culture of active citizen journalism

    Directory of Open Access Journals (Sweden)

    Fredrick Ogenga

    2011-08-01

    Full Text Available This paper utilises Hall’s (1977 ‘encoding-decoding’ theory in the context of critical political economy theories of the media and cultural studies to explain the political, economic and cultural factors that influence media operation and content both at a macro and micro level. While political economy provides the setting in which the Kenyan media operates, cultural studies show how media content is not only shaped by the political and economic environments comprising those in power positions. Audiences are also actively engaged in the process of meaning construction. Considering Hall’s (1977 encoding-decoding theory, the audiences can reject, negotiate or accept media content based on their own value systems and cultural orientation. Meaning, therefore, becomes a product of continual struggle between different discourses and power cannot be located in a top down manner as to who influences meaning as seen in a propaganda model. This is due to the fact that texts are diffused in different locations in society. The 2008 Kenya Communication Bill is utilised as an example to trace briefly the political and historical developments of policy issues that have influenced the Kenyan media. The Bill, furthermore, indicates how a weak socio-economic, political and cultural environment is marred by ineffectual policies meant to safeguard and guarantee the freedom of the press as an extension of individual freedom of expression as enshrined in the Kenyan constitution. This weak policy context has ensured the Kenyan media remains subject to easy political manipulation and control. However, the paper concludes by showing how citizen journalism is growing out of a regulated mainstream media through internet technology.

  6. "Journalism, Poetry, Stand-Up Comedy, and Academic Writing: Mapping the Interplay of Curricular and Extracurricular Literate Activities": Re-Visiting a Theoretical Lens Five Years Later

    Science.gov (United States)

    Roozen, Kevin

    2014-01-01

    Published in a 2008 issue of "Journal of Basic Writing" ("JBW"), "Journalism, Poetry, Stand-Up Comedy, and Academic Writing: Mapping the Interplay of Curricular and Extracurricular Literate Activities" was Kevin Roozen's first single-authored publication. Drawn from data collected for the first case study from…

  7. Lifestyle Journalism

    DEFF Research Database (Denmark)

    From, Unni; Kristensen, Nete Nørgaard

    2013-01-01

    Lifestyle journalism has experienced enormous growth in the media over the past two decades, but scholars in the fields of journalism and communication studies have so far paid relatively little attention to a field that is still sometimes seen as "not real journalism". There is now an urgent need...... for in-depth exploration and contextualisation of this field, with its increasing relevance for 21st century consumer cultures. For the first time, this book presents a wide range of studies which have engaged with the field of lifestyle journalism in order to outline the various political, economic...... of sub-fields such as travel, music, food, health, fashion and personal technology journalism. This volume provides a fascinating account of the different facets of lifestyle journalism, and charts the way forward for a more sustained analysis of the field. This book was originally published as a special...

  8. Ethnographic journalism

    DEFF Research Database (Denmark)

    Hermann, Anne Kirstine

    2016-01-01

    Accounting for emerging journalistic genres is a difficult endeavor not least because there is little agreement as to what constitutes journalism itself. Doing so, however, is essential if we are to recognize changing journalistic doxas. To capture such changes, we must include a holistic framework...... require more contextual reporting, ethnographic journalism emerges in American feature journalism. Analyzed holistically, this genre is characterized as the employment of immersion strategies adopted from social science for distinct storytelling purposes. These methods, however, transform conventional...... journalistic epistemology, changing it through practice. In turn, the analysis reveals how journalism practices can evolve its troubled philosophical position...

  9. Feasibility of Influencing the Dynamic Fluid Film Coefficients of a Multirecess Journal Bearing by means of Active Hybrid Lubrication

    DEFF Research Database (Denmark)

    Santos, Ilmar; Watanabe, F. Y.

    2003-01-01

    The main objective of this research project is the investigation of multirecess hydrostatic journal bearings with active hybrid (hydrostatic and hydrodynamic) lubrication. This paper gives a theoretical contribution to the modeling of this kind of bearing, combining computational fluid dynamics...... and control techniques. The feasibility of influencing the dynamic fluid film coefficients (stiffness and damping) by means of a controllable fluid injection into opposed bearing recesses is investigated. By controlling the pressure and flow injection using servo control systems, it is possible to obtain...

  10. JOURNAL INFORMATION

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    Journal of Shenzhen University Journal of Shenzhen University Science and Engineering (ISSN 1000-2618) started publication in 1984 and is issued quarterly on 112 A4 pages. Its main topics cover the disciplines of electron optics and infor- mation engineering, architecture and civ

  11. Radio Journalism.

    Science.gov (United States)

    Bittner, John R.; Bittner, Denise A.

    This book, a how-to-do-it guide for the novice and the professional alike, deals with several aspects of radio journalism: producing documentaries, preparing and announcing radio news, ethics and responsibility, regulation of radio journalism, and careers. It traces the history and growth of radio news, shows its impact on the public, and…

  12. AJEMS - a new journal

    DEFF Research Database (Denmark)

    Kuada, John

    2010-01-01

    African Journal of Economic and Management Studies (AJEMS) provides an avenue for disseminating empirical research results, as well as theoretical viewpoints and methodologies that could impact positively on economic and business activities in Africa.......African Journal of Economic and Management Studies (AJEMS) provides an avenue for disseminating empirical research results, as well as theoretical viewpoints and methodologies that could impact positively on economic and business activities in Africa....

  13. New journals

    NARCIS (Netherlands)

    NN,

    1977-01-01

    Brunonia is the title of a journal that will replace the Contributions from Herbarium Australiense (last no. 17, 1976). Subscriptions Aust. $ 4. annual, Herbarium Australiense, P.O. Box 1600, Canberra City, A.C.T. 2601, Australia. Nature Malaysiana, published quarterly by Tropical Press, 64A Jl. Buk

  14. GENETIC ACTIVITY PROFILES AND PATTERN RECOGNITION IN TEST BATTERY SELECTION (JOURNAL VERSION)

    Science.gov (United States)

    Computer-generated genetic activity profiles and pairwise matching procedures may aid in the selection of the most appropriate short-term bioassays to be used in test batteries for the evaluation of the genotoxicity of a given chemical or group of chemicals. Selection of test bat...

  15. Active lubrication applied to radial gas journal bearings. Part 2: Modelling improvement and experimental validation

    DEFF Research Database (Denmark)

    Pierart, Fabián G.; Santos, Ilmar F.

    2016-01-01

    Actively-controlled lubrication techniques are applied to radial gas bearings aiming at enhancing one of their most critical drawbacks, their lack of damping. A model-based control design approach is presented using simple feedback control laws, i.e. proportional controllers. The design approach...... combines three main domains: tribology, dynamics and control. The Reynolds equation with radial injection, including piezoelectrically controlled jet, describes the non-linear interaction between bearing surface and rotating shaft. Dynamics of the flexible shaft and rotating parts are modelled aid...... by finite element method and the global model is used as control design tool. Active lubrication allows for significant increase in damping factor of the rotor-bearing system. Very good agreement between theory and experiment is obtained, supporting the multi-physic design tool developed....

  16. RET/PTC activation in papillary thyroid carcinoma: European Journal of Endocrinology Prize Lecture.

    Science.gov (United States)

    Santoro, Massimo; Melillo, Rosa Marina; Fusco, Alfredo

    2006-11-01

    Papillary thyroid carcinoma (PTC) is frequently associated with RET gene rearrangements that generate the so-called RET/PTC oncogenes. In this review, we examine the data about the mechanisms of thyroid cell transformation, activation of downstream signal transduction pathways and modulation of gene expression induced by RET/PTC. These findings have advanced our understanding of the processes underlying PTC formation and provide the basis for novel therapeutic approaches to this disease. PMID:17062879

  17. RET/PTC activation in papillary thyroid carcinoma: European Journal of Endocrinology Prize Lecture.

    Science.gov (United States)

    Santoro, Massimo; Melillo, Rosa Marina; Fusco, Alfredo

    2006-11-01

    Papillary thyroid carcinoma (PTC) is frequently associated with RET gene rearrangements that generate the so-called RET/PTC oncogenes. In this review, we examine the data about the mechanisms of thyroid cell transformation, activation of downstream signal transduction pathways and modulation of gene expression induced by RET/PTC. These findings have advanced our understanding of the processes underlying PTC formation and provide the basis for novel therapeutic approaches to this disease.

  18. Comparison of Models for the Steady-State Analysis of Tilting-Pad Thrust Bearings

    DEFF Research Database (Denmark)

    Heinrichson, Niels; Santos, Ilmar

    2005-01-01

    Prediction of the minimum oil film thickness and the maximum temperature on the surface of the bearing pad is crucial in the design and dimensioning of bearings. Friction loss, oil bath temperature and pad deflection are other parameters of interest. Depending on the desired information a numerical...... groove between pads and the oil bath temperature from energy equilibrium for the entire bearing. The main theoretical contribution of this paper is the elaboration and comparison of 7 different mathematical models of increasing complexity. The results are compared to experimental data for steady......-state operation of a 228 mm outer diameter bearing. It is found that for the given bearing a two dimensional model is sufficient to estimate the minimum oil film thickness and the maximum temperature on the pad surface. Three dimensional modelling does not improve the quality of the results....

  19. Journal club.

    Science.gov (United States)

    1984-01-01

    Dr Janet Gale, Lecturer in the Health and Social Welfare Section at the Open University's Centre for Continuing Education, has selected eight articles which she thought might be of interest to readers of Medical Teacher. Her personal comments appear at the end of each review. New Ways with Text 'A new approach to the design of instructional text' Harden, R. M. and Sowden, S. Journal of Audiovisual Media in Medicine 1983; 6: 124-129. Effective Educational Media 'Learning from audio-visual media' Bates, T. Teaching at a Distance. Institutional Research Review, 1982; 1: 33-57. Complementary to 'Effective Educational Media' 'The differential investment of mental effort in learning from different sources' Salomon, G. Educational Psychologist 1983; 18: 42-50. Technology in Education 'The educational potential of cable television networks in the UK' Boyd-Barrett, J. O. Educational Studies 1983; 9: 221-231. Medical Education and Independent Learning 'How medical students learn' Vu, N. V. and Galofre, A. Journal of Medical Education 1983; 58: 601-610. The Teaching Personality 'Personality traits in effective clinical teachers' Kegel-Flom, P. Research in Higher Education 1983; 19: 73-82. PMID:24476410

  20. Good journalism or peace journalism?

    Directory of Open Access Journals (Sweden)

    David Loyn

    2007-10-01

    Full Text Available This paper argues against the prescriptive notions of Peace Journalism, and in particular its exclusive nature and attempt to define itself as a new orthodoxy. Most of the paper is a critique of the work of Jake Lynch and Annabel McGoldrick, in a book published in 2005, as well as their earlier Reporting the World series. They condemn all other ways of reporting as 'War Journalism, biased in favour of war.' I argue instead that the opposite of Peace Journalism is good journalism. Much of this Peace Journalism argument is derived from the work of Johan Galtung, who accuses 'war journalists' of reporting war in an enclosed space and time, with no context, concealing peace initiatives and making wars 'opaque/secret.' Galtung specifically calls on journalists as part of their mission to search out peace proposals which might begin as something small and beneath notice, but which might then be picked up and owned by politicians as their own. My response is clear and simple: creating peacemaking politicians is not the business of a reporter. I examine the traditional journalistic methods of using objectivity to get at a version of the truth. I concede that perfect truth is unattainable, (and paradoxically the tool of objectivity we use to get there is slippery too. I conclude that a more quotidian truth, or 'truthfulness' is though a manageable goal. I engage with philosophers who examine objectivity, concluding with the assistance of Thomas Nagel that it does still have a value. Nagel's account also has the merit of explaining how practices such as peace-reporting are bound to be less objective than alternatives, 'since they commit themselves to the adoption of particular perspectives, in effect giving up on the ideal of stripping away as much…as possible.' I examine the responses of the so-called 'journalism of attachment' framed as a desire of journalists faced by the horrors of Bosnia to cast off impartiality and emotional detachment and take

  1. Compensation of Cross-Coupling Stiffness and Increase of Direct Damping in Multirecess Journal Bearings using Active Hybrid Lubrication

    DEFF Research Database (Denmark)

    Santos, Ilmar; Watanabe, F.Y.

    2004-01-01

    Fluid film forces are generated in hydrostatic journal bearings by two types of lubrication mechanisms: the hydrostatic lubrication in the bearing recesses and hydrodynamic lubrication in the bearing lands, when operating in rotation. The combination of both lubrication mechanisms leads to hybrid...

  2. What are Journals for?

    Science.gov (United States)

    Rallison, S P

    2015-03-01

    'The secret is comprised in three words - work, finish, publish.' Michael Faraday There are many reasons doctors want to publish their work. For most at an early stage in their career, this may be to add a line to their curriculum vitae and advance their careers but for academics, publishing is an expectation. Many will believe they have something important to say, and wish to provoke debate and discussion; others wish to share knowledge and experiences, which in medicine can lead to a satisfying change in clinical practice. All serve to register one's idea and educate others. However, for some, the reason is as basic as money. As we celebrate the 350th anniversary of the first academic publication, perhaps we have come full circle when it comes to why people publish? Publishing is a flourishing business. There were approximately 28,100 active scholarly peer-reviewed journals in mid-2012, collectively publishing about 1.8-1.9 million articles per year. The number of articles published each year and the number of journals have both grown steadily for more than two centuries, by about 3% and 3.5% per year respectively. (1) Journals have a responsibility to refine and define information and act as a scientific filter. Many of us will receive daily invitations in our email inbox from eclectic and new journals that are likely to take anything - is the filter now too porous? But this industry is like any other commercial activity and the supply still far outstrips the demand. Perhaps the internet revolution has merely fuelled our hunger to publish more? The launch of this exciting and innovative series about publishing coincides with the 350th celebration of the publication of the first academic journal. In the age of social media, the first question is 'What are journals for?', which Simon Rallison sets out to answer. Simon is Director of Publications at the Physiological Society, and was previously a journal publisher with Earthscan, Springer and Blackwell. Writing is

  3. Journal bearing

    Science.gov (United States)

    Menke, John R.; Boeker, Gilbert F.

    1976-05-11

    1. An improved journal bearing comprising in combination a non-rotatable cylindrical bearing member having a first bearing surface, a rotatable cylindrical bearing member having a confronting second bearing surface having a plurality of bearing elements, a source of lubricant adjacent said bearing elements for supplying lubricant thereto, each bearing element consisting of a pair of elongated relatively shallowly depressed surfaces lying in a cylindrical surface co-axial with the non-depressed surface and diverging from one another in the direction of rotation and obliquely arranged with respect to the axis of rotation of said rotatable member to cause a flow of lubricant longitudinally along said depressed surfaces from their distal ends toward their proximal ends as said bearing members are rotated relative to one another, each depressed surface subtending a radial angle of less than 360.degree., and means for rotating said rotatable bearing member to cause the lubricant to flow across and along said depressed surfaces, the flow of lubricant being impeded by the non-depressed portions of said second bearing surface to cause an increase in the lubricant pressure.

  4. From Hybrid to Actively-Controlled Gas Lubricated Bearings – Theory and Experiment

    DEFF Research Database (Denmark)

    Morosi, Stefano

    experimentally, showing dependency on the supply pressure and, less prominently, the rotational velocity. Moreover, additional research is carried out in order to perform a feasibility study on a new kind of hybrid permanent magnetic – aerodynamic gas bearing. This new kind of machine is intended to exploit...... bearings, tilting pad and flexure pivot gas bearings. These solutions proved to be effective in improving static and dynamic properties of the bearings, however issues related to the manufacturing and accuracy of predictions has so far limited their applications. Another drawback is that passive bearings...... offer a low degree of robustness, meaning that an accurate optimization is necessary for each application. Another way of improving gas bearings operation performance is by using active control systems, transforming conventional gas bearings in an electro-mechanical machine component. In this framework...

  5. Journalism Education in Canada.

    Science.gov (United States)

    MacDonald, Dick; Russell, Catharine

    Twenty-four of the 35 Canadian schools with formal journalism programs responded to a survey conducted to collect data about enrollment, curricula, faculty background in journalism, and the ability of journalism graduates to find jobs in the profession. Highlights of the results are as follows: there are an estimated 3,300 journalism students in…

  6. European journals on microbiology.

    Science.gov (United States)

    Ronda, C; Vázquez, M

    1997-12-01

    A survey on the scientific journals dealing with microbiology published in Europe has been carried out. Eighteen European countries publish microbiological journals with the United Kingdom. Netherlands and Germany leading in number of journals on this specialty. Most of the European journals on microbiology are published bimonthly (27%), and English is the most common language used (54%). Most of these journals (86%) are included in some database, but only 36 (25%) are indexed in the six databases studied. Out of the 146 journals registered, 71 (49%), published in 11 European countries, are included in the 1995 Journal Citation Reports (ISI, Philadelphia).

  7. From Journalism Studies to Journalism Theory

    Directory of Open Access Journals (Sweden)

    Elias Machado

    2005-06-01

    Full Text Available This paper comprises three parts –- 1 recognition of professional practice as a legitimate object of research; 2 development of methodologies that are adjusted to the particularities of the area; and 3 funding of multidisciplinary experiments on applied research. My intention here is to build on the mapping of existing studies to discuss some assumptions and to consolidate journalism as a fi eld of knowledge, based on the distinction between journalism studies and journalism theories.

  8. The Journal Rankings of Central Banks

    OpenAIRE

    Kohlscheen, Emanuel

    2011-01-01

    This paper analyzes the citation patterns of the central banks of the 15 largest monetary areas of the world that had an active working paper series in 2010. It proceeds to construct a novel journal ranking that is more suited for monetary authorities than the academic journal rankings currently in vogue. We report individual country rankings as well as the global rankings. While important regional differences emerge, the Journal of Monetary Economics, the American Economic Review, the Journa...

  9. eJournals verwalten

    OpenAIRE

    Bertelmann, Roland; Magee, Kirsten; Plieninger, Jürgen

    2004-01-01

    Erwerbung, Erschliessung, Verwaltung und Marketing von eJournals in Bibliotheken wird im Ablauf stichwortartig dargestellt. Acquisition, indexing, management and marketing of eJournals in libraries are shown as a checklist.

  10. CHINESE JOURNAL OF CHEMISTRY

    Institute of Scientific and Technical Information of China (English)

    2000-01-01

    @@Chinese Journal of Chemistry is an international journal published in English by the Chinese Chemical Society with its editorial office hosted by Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences.

  11. Data Journalism Grows Up

    OpenAIRE

    Hewett, J.

    2015-01-01

    Data journalism has evolved partly out of computer-assisted reporting (CAR) in the USA – bolstered by freedom of information (FoI), open data and journalism education. Jonathan Hewett traces the development and teaching of data journalism in the UK.

  12. Social media and journalism study 2013 - Sweden

    OpenAIRE

    Pole, K.; Gulyás, A

    2013-01-01

    This report is part of the wider 2013 social journalism study and reports specifically on Sweden. It suggests that journalists in Sweden are a moderately high user of social media, using it regularly for their work particularly for sourcing stories. Using cluster analysis the largest group is the Architects suggesting that journalism in Sweden is dominated by active social media users.

  13. Journalism Curiosity and Story Telling Frame

    DEFF Research Database (Denmark)

    Grunwald, Ebbe; Rupar, Verica

    2009-01-01

    This comparative study of journalism practices in Australia and Denmark explores the interplay between two concepts relevant for journalism's meaning-making activity: a curiosity seen as an action meant to close an information gap, and a story telling frame seen as a form of structuring information...

  14. Translation Aestheticsand Communication Theory of Journalism English

    Institute of Scientific and Technical Information of China (English)

    陈曜

    2007-01-01

    This paper describes the present translation theories and standards especially in journalism English translation and imply these theories in my issue. Moreover, I will explain how to apply the translation aesthetics and communication theory of translation in the course of journalism English translation activities. So that translation will achieve elegance in English news text and its Chinese version as well.

  15. How to Rank Journals.

    Science.gov (United States)

    Bradshaw, Corey J A; Brook, Barry W

    2016-01-01

    There are now many methods available to assess the relative citation performance of peer-reviewed journals. Regardless of their individual faults and advantages, citation-based metrics are used by researchers to maximize the citation potential of their articles, and by employers to rank academic track records. The absolute value of any particular index is arguably meaningless unless compared to other journals, and different metrics result in divergent rankings. To provide a simple yet more objective way to rank journals within and among disciplines, we developed a κ-resampled composite journal rank incorporating five popular citation indices: Impact Factor, Immediacy Index, Source-Normalized Impact Per Paper, SCImago Journal Rank and Google 5-year h-index; this approach provides an index of relative rank uncertainty. We applied the approach to six sample sets of scientific journals from Ecology (n = 100 journals), Medicine (n = 100), Multidisciplinary (n = 50); Ecology + Multidisciplinary (n = 25), Obstetrics & Gynaecology (n = 25) and Marine Biology & Fisheries (n = 25). We then cross-compared the κ-resampled ranking for the Ecology + Multidisciplinary journal set to the results of a survey of 188 publishing ecologists who were asked to rank the same journals, and found a 0.68-0.84 Spearman's ρ correlation between the two rankings datasets. Our composite index approach therefore approximates relative journal reputation, at least for that discipline. Agglomerative and divisive clustering and multi-dimensional scaling techniques applied to the Ecology + Multidisciplinary journal set identified specific clusters of similarly ranked journals, with only Nature & Science separating out from the others. When comparing a selection of journals within or among disciplines, we recommend collecting multiple citation-based metrics for a sample of relevant and realistic journals to calculate the composite rankings and their relative uncertainty windows.

  16. How to Rank Journals.

    Science.gov (United States)

    Bradshaw, Corey J A; Brook, Barry W

    2016-01-01

    There are now many methods available to assess the relative citation performance of peer-reviewed journals. Regardless of their individual faults and advantages, citation-based metrics are used by researchers to maximize the citation potential of their articles, and by employers to rank academic track records. The absolute value of any particular index is arguably meaningless unless compared to other journals, and different metrics result in divergent rankings. To provide a simple yet more objective way to rank journals within and among disciplines, we developed a κ-resampled composite journal rank incorporating five popular citation indices: Impact Factor, Immediacy Index, Source-Normalized Impact Per Paper, SCImago Journal Rank and Google 5-year h-index; this approach provides an index of relative rank uncertainty. We applied the approach to six sample sets of scientific journals from Ecology (n = 100 journals), Medicine (n = 100), Multidisciplinary (n = 50); Ecology + Multidisciplinary (n = 25), Obstetrics & Gynaecology (n = 25) and Marine Biology & Fisheries (n = 25). We then cross-compared the κ-resampled ranking for the Ecology + Multidisciplinary journal set to the results of a survey of 188 publishing ecologists who were asked to rank the same journals, and found a 0.68-0.84 Spearman's ρ correlation between the two rankings datasets. Our composite index approach therefore approximates relative journal reputation, at least for that discipline. Agglomerative and divisive clustering and multi-dimensional scaling techniques applied to the Ecology + Multidisciplinary journal set identified specific clusters of similarly ranked journals, with only Nature & Science separating out from the others. When comparing a selection of journals within or among disciplines, we recommend collecting multiple citation-based metrics for a sample of relevant and realistic journals to calculate the composite rankings and their relative uncertainty windows. PMID:26930052

  17. How to Rank Journals.

    Directory of Open Access Journals (Sweden)

    Corey J A Bradshaw

    Full Text Available There are now many methods available to assess the relative citation performance of peer-reviewed journals. Regardless of their individual faults and advantages, citation-based metrics are used by researchers to maximize the citation potential of their articles, and by employers to rank academic track records. The absolute value of any particular index is arguably meaningless unless compared to other journals, and different metrics result in divergent rankings. To provide a simple yet more objective way to rank journals within and among disciplines, we developed a κ-resampled composite journal rank incorporating five popular citation indices: Impact Factor, Immediacy Index, Source-Normalized Impact Per Paper, SCImago Journal Rank and Google 5-year h-index; this approach provides an index of relative rank uncertainty. We applied the approach to six sample sets of scientific journals from Ecology (n = 100 journals, Medicine (n = 100, Multidisciplinary (n = 50; Ecology + Multidisciplinary (n = 25, Obstetrics & Gynaecology (n = 25 and Marine Biology & Fisheries (n = 25. We then cross-compared the κ-resampled ranking for the Ecology + Multidisciplinary journal set to the results of a survey of 188 publishing ecologists who were asked to rank the same journals, and found a 0.68-0.84 Spearman's ρ correlation between the two rankings datasets. Our composite index approach therefore approximates relative journal reputation, at least for that discipline. Agglomerative and divisive clustering and multi-dimensional scaling techniques applied to the Ecology + Multidisciplinary journal set identified specific clusters of similarly ranked journals, with only Nature & Science separating out from the others. When comparing a selection of journals within or among disciplines, we recommend collecting multiple citation-based metrics for a sample of relevant and realistic journals to calculate the composite rankings and their relative uncertainty windows.

  18. Scientific journal cancellations

    CERN Multimedia

    The Library

    2001-01-01

    Earlier this year the Scientific Information Policy Board (SIPB) requested the Library and the Working Group for Acquisitions to revise the current printed journal collection in order to cancel those titles that are less required. Savings could then be used for the development of other collections and particularly electronic resources needed to support CERN current research activities. A list of proposed cancellations was drawn and posted on the Library web pages: http://library.cern.ch/library_general/cancel.html The SIPB invites every one to check if any of the titles are of importance to their work, in which case you are invited to inform the Library before the 25th of September by sending an e-mail to: eliane.chaney@cern.ch Titles not reconsidered by the users will be cancelled by the end of the year. Thank you, The Library

  19. Ranking Economic History Journals

    DEFF Research Database (Denmark)

    Di Vaio, Gianfranco; Weisdorf, Jacob Louis

    This study ranks - for the first time - 12 international academic journals that have economic history as their main topic. The ranking is based on data collected for the year 2007. Journals are ranked using standard citation analysis where we adjust for age, size and self-citation of journals. We...... also compare the leading economic history journals with the leading journals in economics in order to measure the influence on economics of economic history, and vice versa. With a few exceptions, our results confirm the general idea about what economic history journals are the most influential...... for economic history, and that, although economic history is quite independent from economics as a whole, knowledge exchange between the two fields is indeed going on....

  20. Ranking economic history journals

    DEFF Research Database (Denmark)

    Di Vaio, Gianfranco; Weisdorf, Jacob Louis

    2010-01-01

    This study ranks-for the first time-12 international academic journals that have economic history as their main topic. The ranking is based on data collected for the year 2007. Journals are ranked using standard citation analysis where we adjust for age, size and self-citation of journals. We also...... compare the leading economic history journals with the leading journals in economics in order to measure the influence on economics of economic history, and vice versa. With a few exceptions, our results confirm the general idea about what economic history journals are the most influential for economic...... history, and that, although economic history is quite independent from economics as a whole, knowledge exchange between the two fields is indeed going on....

  1. The Journal of Inflammation

    OpenAIRE

    Punchard Neville A; Whelan Cliff J; Adcock Ian

    2004-01-01

    Abstract Welcome to the Journal of Inflammation, the first open-access, peer-reviewed, online journal to focus on all aspects of the study of inflammation and inflammatory conditions. While research into inflammation has resulted in great progress in the latter half of the 20th century, the rate of progress is rapidly accelerating. Thus there is a need for a vehicle through which this very diverse research can be made readily available to the scientific community. The Journal of Inflammation,...

  2. Journal of Business Chemistry

    OpenAIRE

    2013-01-01

    The Journal of Business Chemistry examines issues associated with leadership and management for chemists and managers working in chemical research or industry. This journal is devoted to improving and developing the field of Business Chemistry. The Journal of Business Chemistry publishes peer-reviewed papers (including case studies) and essays. Areas for possible publication in include: leadership issues in the chemical and biochemical industry, such as teamwork, team building, mentoring, coa...

  3. Current Institutional Trends in Research Productivity in Counseling Psychology Journals

    Science.gov (United States)

    Diegelman, Nathan M.; Uffelman, Rachel A.; Wagner, Kimberly S.; Diegelman, Sally A.

    2005-01-01

    This study investigated institutional publication activity in counseling psychology journals for the 10-year period from 1993 to 2002. Four journals reported by counseling psychology training directors as prime publication outlets for the field of counseling psychology were used: "Journal of Counseling Psychology," "The Counseling Psychologist,"…

  4. Thank you reviewers- CytoJournal 2007

    Directory of Open Access Journals (Sweden)

    Atkinson Barbara

    2007-01-01

    Full Text Available Abstract Significant efforts, time, and resources are devoted for peer-reviewing numerous CytoJournal manuscripts. The Editorial Board of CytoJournal shares a significant proportion of this activity. Additional peers are requested to join periodically as 'academic editors' and reviewers to review CytoJournal manuscripts. We thank all the reviewers and academic editors for their time and efforts for completing the peer-review of CytoJournal manuscripts during 2006. The continued success of this important academic exercise depends on their continued enthusiasm to support with their highest standards. We also thank all the contributing authors for selecting CytoJournal and supporting open access initiative, which allows retention of the copyrights to their corresponding academic accomplishments.

  5. Journal of Vietnamese Environment

    OpenAIRE

    2012-01-01

    The Journal of Vietnamese Environment (J. Viet. Env.) plays the role of a scientific platform for researchers and stakeholders working on environmental issues in Vietnam and abroad. The journal is open for all kind of Vietnam-related environmental topics, from climate change and renewable energies to legislative framework and socio-economic aspects.

  6. Variable Parameters PD Control and Stability of a High Rate Rigid Rotor-Journal Active Magnetic Bearing System

    Institute of Scientific and Technical Information of China (English)

    LUO Kai

    2005-01-01

    Stability is a key problem that means whether a high rate rotor-active magnetic bearings system works reliably or not. Aiming at a bearings system described with nonlinear equations, this paper built a linear model according to the system behavior. Considering realization of the control system and behavior of a high rate rotor system (magnetic force is far smaller than input force produced by mass eccentricity) this paper proposes a design method of variable parameters PD control algorithm that can be used universally. The control system was simplified and a mass of adjusting work of control parameters was reduced. Analysis and simulation indicated that the bearings system could get a wider stable region of harmonic motion, and proved that the algorithm is robust and advanced. The control system can be realized because the winding electric currents are positive. The method is convenient for operation and can easily be used for engineering practice.

  7. Our Censored Journals

    Directory of Open Access Journals (Sweden)

    David Healy

    2008-01-01

    Full Text Available When an article is rejected by a medical journal, the standard assumption is that the article is unsound or there is something wrong with the author. Alternatively, it may have been because the journal editor was concerned about the consequences should the article be published. This article seeks to inform discussion by providing a series of instances in which editorial concerns about the consequences to journals may have counted for more than any assessment about the truth-value of the article or the motives of its authors. This claim is based on the fact that different journals may treat exactly the same article in an entirely different fashion; some issues appear to be taboo in certain journals, no matter who the author, and there is a series of explicit communications from editors that publication has been held up by their legal departments.

  8. Publishing papers in international journals

    Institute of Scientific and Technical Information of China (English)

    2003-01-01

    @@ INTRODUCTIONThere is increasing pressure for scientists in all countries, including China,to publish their research in international journals.This is necessary for personal careers,as well as for the reputations of universities and other research organizations.Additionally,with the continued growth in international scientific research and the speed with which advances are being made,and active and successful researcher needs to take part in the global circulation of results and information on new technologies.

  9. Rotordynamic Evaluation of Full Scale Rotor on Tilting Pad Bearings with 0.1 and 0.3 Preload

    Directory of Open Access Journals (Sweden)

    Weimin Wang

    2014-01-01

    Full Text Available A system identification method for rotating machinery stability evaluation is investigated based on sine sweep excitation testing with electromagnetic actuator. The traditional MIMO FRF is transformed into dFRF from real number field to complex field with a transformation matrix, eliminating the influence of forward and backward modal overlap and providing higher accuracy to identify rotor’s first forward modal parameters using the rational polynomial method. The modal parameters are acquired for stability estimation. Furthermore, two sets of bearing with preloads of 0.1 and 0.3 under both load-on-pad (LOP and load-between-pad (LBP conditions are investigated. The effects of oil inlet pressure (1.0 bar–1.75 bar and temperature (43°C–51°C on the stability of rotor are investigated in detail. Results indicate that the stability of rotor will be improved by increasing the oil inlet temperature and pressure. It is found that the rotor is more stable on bearing with 0.1 preload than that of 0.3 preload. Load-on-pad provides more damping to rotor than load-between-pad. The method and outcomes of this paper can provide both theory basis and technology foundation for improving the rotor stability of centrifugal compressors.

  10. Journal of CHINA PLASTICS

    Institute of Scientific and Technical Information of China (English)

    2012-01-01

    Journal of CHINA PLASTICS was authorized and approved by The State Committee of Science and Technology of China and The Bureau of News Press of China, and published by The China Plastics Processing Industry Association,Beijing Technology and Business University and The Institute of Plastics Processing and Application of Light Industry, distributed worldwide. Since its birth in 1987, CHINA PLASTICS has become a leading magazine in plastics industry in China, a national Chinese core journal and journal of Chinese scientific and technological article statistics. It is covered by CA.

  11. Computational Journalism. When journalism meets programming

    OpenAIRE

    Stavelin, Eirik

    2014-01-01

    Digital data sources and platforms allow journalists to produce news in new and different ways. The shift from an analog to digital workflow introduces computation as a central component of news production. This enables variability for end users, automation of tedious tasks for newsrooms, and allows journalists to tackle analysis of the increasingly large sets of data relevant to citizens. To journalism, computerization is a promising path for news production, particularly for ...

  12. US Marine Meteorological Journals

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This series consists of volumes entitled 'Meteorological Journal' (a regulation Navy-issue publication) which were to be completed by masters of merchant vessels...

  13. Journalism Pedagogical Framework Report

    DEFF Research Database (Denmark)

    Jørgensen, Asbjørn Slot

    design – the physical space for teaching integrated journalism skills - Collaboration: group size and group composition - Entrepreneur-ship and intrapreneur-ship – competitive and real-life - Social media: the new ethics. - Social media – professional profiles for journalists. - The journalism teachers......The aim of this report is to share inspiration and ideas among European universities and journalism schools. The report is an output from the Work Package 4 of the IJIE project, a Lifelong Learningproject supported by the European Union. In 2014, the IJIE project produced a State of the Art...... publication with a set of recommendations. We have expanded and developed these findings establishing a range of hands-on and realistic tipsheets from the consortium partners' own curricula, along with the description of selected model courses from other universities and journalism schools. As such...

  14. Incentives for Journal Editors

    OpenAIRE

    Jinyoung Kim; Kanghyock Koh

    2014-01-01

    Scholars may become journal editors because editors may generate more citations of their own works. This paper empirically establishes that a scholar's publications are more likely to be cited by papers in a journal that is edited by the scholar. We then test if editors exercise influence on authors to cite editors papers by either pressuring authors (editorpressure hypothesis) or accepting articles with references to the editors papers (editorselection hypothesis), by using the keyword analy...

  15. Journal of Proton Therapy

    OpenAIRE

    Editorial Office

    2015-01-01

    Journal of Proton Therapy (JPT) is an international open access, peer-reviewed journal, which publishes original research, technical reports, reviews, case reports, editorials, and other materials on proton therapy with focus on radiation oncology, medical physics, medical dosimetry, and radiation therapy.No article processing/submission feeNo publication feePeer-review completion within 3-6 weeksImmediate publication after the completion of final author proofreadDOI assignment for each publi...

  16. Language Works. Linguistic Journal

    DEFF Research Database (Denmark)

    Thøgersen, Jacob; Hartling, Anna Sofie; Nørreby, Thomas Rørbeck;

    2016-01-01

    Language works! – and with this initiative and this journal we want to give the opportunity to many more students to present their linguistic research to each other, to the scientific community and to all interested.......Language works! – and with this initiative and this journal we want to give the opportunity to many more students to present their linguistic research to each other, to the scientific community and to all interested....

  17. 轴线偏斜对多瓦径向滑动轴承热润滑性能的影响%Effects of Misalignment on Thermal Hydrodynamic Lubrication of Multi-pad Journal Bearing

    Institute of Scientific and Technical Information of China (English)

    黎伟; 陈志祥; 汪久根

    2011-01-01

    The effects of misalignment on the thermal hydrodynamic lubrication of multi-tilting-pad journal bearings were analyzed. With the considerations of shaft misalignment and degree of freedom of the pads, a film thickness equation was derived out, and a mathematical model was established. For pads with single degree of freedom and double degrees of freedom, the minimum film thickness, pressure distribution and three-dimensional temperature distribution of each pad were calculated for different extents of journal misalignment, and the effects of misalignment on these two kinds of journal bearings were comparatively studied. The results demonstrate that the misalignment has remarkable effects on journal bearings with single degree of freedom pads, which results in asymmetrical distribution of the axial pressure, and induces unbalanced moment, but slight effects on bearings with two degrees of freedom pads.%分析轴线偏斜对多瓦可倾瓦径向滑动轴承热流体动力润滑性能的影响.计及轴线偏斜与瓦块自由度,推导可倾瓦径向滑动轴承的油膜厚度方程,建立数学模型,计算单自由度、双自由度2种瓦块支承的径向滑动轴承在不同偏斜程度时的最小油膜厚度、压力和三维温度分布,并分析偏斜对这2种轴承热流体动力润滑性能的影响.结果表明,轴线偏斜对单自由度瓦径向滑动轴承有较大影响,会使单自由度瓦块的可倾瓦径向滑动轴承的油膜压力在轴向分布不对称,导致瓦块支承处产生不平衡的力矩,而对双自由度瓦径向滑动轴承的润滑性能几乎没有影响.

  18. See your ideas in print: write for a professional journal.

    Science.gov (United States)

    McConnell, Charles R

    2010-01-01

    Those who have sometimes thought about writing for a professional journal should be encouraged by the fact that most journal writers are the same as journal readers-practitioners and educators who have something of potential value to share with others. There are career-enhancing advantages in journal writing, and there can be a significant amount of personal satisfaction as well. Succeeding at writing and placing a journal article requires the following: selecting an appropriate topic; knowing the publication and its audience and framing the article in the appropriate style; working with the journal editor to create an acceptable manuscript, which includes responding positively to the editor's criticisms and suggestions; and observing all submission requirements and deadlines. One who follows this entire process to its positive conclusion will find that journal writing can be an exacting, demanding, frustrating, and immensely satisfying professional activity. PMID:20686400

  19. Journalism of Relation

    DEFF Research Database (Denmark)

    Blaagaard, Bolette

    of the self-other relation which is simultaneously personal and political. Secondly, the dissertation relates the phenomenological ‘race’ and gender debates to the societal and productive context of contemporary European and ‘western’ globalised and mediated culture and politics. Journalism is re...... accountability and relation from journalistic training and practices whereby a ‘white’ and homogeneous social imaginary is reproduced. I make a call for thinking about journalism as relation – in terms of technological mediations, but also in terms of subjectivities. In order to allow for this, a shift is needed...... of cosmopolitanism from universal reproductions of sameness into creative productions of singular self-other relations based on the practiced and productive journalism. This is substantiated through case study analyses. The aim is to challenge the modern, rational journalistic subject referring back to the unified...

  20. Rethinking Journalism Again

    DEFF Research Database (Denmark)

    . But does rehashing such familiar rationales bring journalism studies forward? Does it contribute to ongoing discussions surrounding journalism’s viability going forth? For all their seeming self-evidence, this book considers what bearing these old platitudes have in the new digital era. It asks whether......It’s easy to make a rhetorical case for the value of journalism. Because, it is a necessary precondition for democracy; it speaks to the people and for the people; it informs citizens and enables them to make rational decisions; it functions as their watchdog on government and other powers that be...

  1. Lifestyle Journalism: Blurring boundaries

    DEFF Research Database (Denmark)

    From, Unni

    2013-01-01

    , social and cultural tensions within it. Taking a comparative view, the collection includes studies covering four continents, including countries such as Australia, China, Norway, Denmark, Singapore, the UK and the USA. While keeping the broader lifestyle field in mind, the chapters focus on a variety...... of sub-fields such as travel, music, food, health, fashion and personal technology journalism. This volume provides a fascinating account of the different facets of lifestyle journalism, and charts the way forward for a more sustained analysis of the field. This book was originally published as a special...

  2. Chinese Journalism Students

    DEFF Research Database (Denmark)

    Dombernowsky, Laura Møller

    2014-01-01

    2012 with 41 students studying journalism at People's University, Tsinghua University, China Youth University for Political Sciences, Central University for Nationalities, Beijing Foreign Languages University and Chinese Academy of Social Sciences in Beijing and at Fudan University in Shanghai....... society. This chapter is concerned with Chinese journalism students' self-perceptions and evaluations of journalistic performances in order to understand the professional values to which they adhere. The study is based on semi-structured in-depth interviews conducted in two periods in Spring 2011 and Fall...

  3. The Crop Journal: A new scientific journal for the global crop science community

    Directory of Open Access Journals (Sweden)

    Jianmin Wan

    2013-10-01

    articles on developments in both techniques and discovery in related fields. This first issue of The Crop Journal gives an idea of how the editors intend to contribute their efforts to increase knowledge and the means to obtain “good crops”. The editorial panel, selected worldwide, brings an impressive range and depth of expertise to the journal, and each member has agreed to become actively involved in guiding its development and ensuring its interaction with the wider community of crop scientists. Through the journal, we would like to support the rapidly developing scientific field, and make results accessible to all interested people. It is the wish of the Editors that the new journal will be read by agricultural scientists all over the world. Research workers can be assured that their contributions will receive prompt and careful attention and will be considered in order of receipt. It is with great pleasure that we publish the first issue of The Crop Journal. Since the success of the new journal depends entirely on the support of the crop science community it will serve, we therefore invite you to join us in making The Crop Journal an objective, advanced, open and successful journal. We look forward to receiving your reactions and advices, together with your support for the journal. May The Crop Journal find conditions favorable to its growth!

  4. Student Journals and Literary Responses at the Community College Level.

    Science.gov (United States)

    Kay, Alan A.

    This paper discusses the use of student journals in a community college literature course as a technique to analyze student responses to literary works. Journal statements collected from 26 students in two classes were evaluated and assigned to the following categories: self and society; class discussion and activity; class discussion, activity,…

  5. The Journalism of Uncertainty.

    Science.gov (United States)

    Patterson, Joye

    1979-01-01

    Science journalism is in a period of change from its prior position of reporting the pronouncements of scientists to one of challenging the conclusions of scientists and using multiple sources to comment on scientific discovery. It is necessary that educational institutions anticipate the need for competent scientific journalists. (RE)

  6. Framing Journalism Education

    Science.gov (United States)

    Abusharif, Ibrahim N.

    2014-01-01

    Examining the growth, incentives, and progress of overseas campuses of major American educational institutions is an important academic pursuit. To have a complete picture, one must also consider the impact these branch campuses are having on the lives of their students. The Northwestern University in Qatar's journalism program was invited to…

  7. Journal of Integrative Agriculture

    Institute of Scientific and Technical Information of China (English)

    2015-01-01

    Aims and Scope Journal of Integrative Agriculture (JIA), formerly Agricultural Sciences in China (ASC), founded in 2002, is an official publication of the Chinese Academy of Agricultural Sciences (CAAS). JIA seeks to publish those papers that are influential and will significantly advance scientific understanding in agriculture fields worldwide.

  8. Existentialism in New Journalism.

    Science.gov (United States)

    Dalmia, Shikha

    In 1977, John C. Merrill, a mass communication scholar, found that many scholars believed that the sixties movement of new journalism is in some way related to existentialism. To find this out, a study identified six main themes of the philosophy of existentialism (as espoused by Jean-Paul Sartre) and looked for the presence of these themes in the…

  9. Limit cycles of a flexible shaft with hydrodynamic journal bearings in unstable regimes

    Science.gov (United States)

    Brown, R. D.; Black, H. F.

    1980-01-01

    A symmetric 3 mass rotor supported on hydrodynamic bearings is described. An approximate method of representing finite bearings is used to calculate bearing forces. As the method sums forces from a number of independent circular lobes lemon 3 and 4 lobe bearings are taken into account. The calculations are based on an axial groove bearing. Linear analysis precedes nonlinear simulation of some unstable conditions. The demonstration of small limit cycles suggests that necessarily flexible rotors e.g., helicopter tail rotors, may be practical without either tilt pad bearings or external dampers.

  10. Three journal similarity metrics and their application to biomedical journals.

    Science.gov (United States)

    D'Souza, Jennifer L; Smalheiser, Neil R

    2014-01-01

    In the present paper, we have created several novel journal similarity metrics. The MeSH odds ratio measures the topical similarity of any pair of journals, based on the major MeSH headings assigned to articles in MEDLINE. The second metric employed the 2009 Author-ity author name disambiguation dataset as a gold standard for estimating the author odds ratio. This gives a straightforward, intuitive answer to the question: Given two articles in PubMed that share the same author name (lastname, first initial), how does knowing only the identity of the journals (in which the articles were published) predict the relative likelihood that they are written by the same person vs. different persons? The article pair odds ratio detects the tendency of authors to publish repeatedly in the same journal, as well as in specific pairs of journals. The metrics can be applied not only to estimate the similarity of a pair of journals, but to provide novel profiles of individual journals as well. For example, for each journal, one can define the MeSH cloud as the number of other journals that are topically more similar to it than expected by chance, and the author cloud as the number of other journals that share more authors than expected by chance. These metrics for journal pairs and individual journals have been provided in the form of public datasets that can be readily studied and utilized by others.

  11. Positioning Open Access Journals in a LIS Journal Ranking

    Science.gov (United States)

    Xia, Jingfeng

    2012-01-01

    This research uses the h-index to rank the quality of library and information science journals between 2004 and 2008. Selected open access (OA) journals are included in the ranking to assess current OA development in support of scholarly communication. It is found that OA journals have gained momentum supporting high-quality research and…

  12. Meet the APS Journal Editors

    Science.gov (United States)

    2016-05-01

    The Editors of the APS journals invite you to join them for conversation. The Editors will be available to answer questions, hear your ideas, and discuss any comments about the journals. All are welcome. Light refreshments will be served.

  13. Publishing corruption discussion: predatory journalism.

    Science.gov (United States)

    Jones, James W; McCullough, Laurence B

    2014-02-01

    Dr Spock is a brilliant young vascular surgeon who is up for tenure next year. He has been warned by the chair of surgery that he needs to increase his list of publications to assure passage. He has recently had a paper reviewed by one of the top journals in his specialty, Journal X-special, with several suggestions for revision. He received an e-mail request for manuscript submission from a newly minted, open access, Journal of Vascular Disease Therapy, which promises a quick and likely favorable response for a fee. What should be done? A. Send the paper to another peer reviewed journal with the suggested revisions. B. Resubmit the paper to Journal X-special. C. Submit to the online journal as is to save time. D. Submit to the online journal and another regular journal. E. Look for another job.

  14. Welcome to electronic physician journal

    Directory of Open Access Journals (Sweden)

    Mehrdad Jalalian

    2009-10-01

    Full Text Available I am delighted to welcome you to the first issue of "Electronic Physician" Journal, the first electronic journal in Iran with license from Iranian ministry of culture. With your help we aim to make this journal a reputable publication for medical and health science. The electronic physician is an electronic journal which publishes the research works as well as reviews, case reports, documentaries and other acceptable formats of articles.I would like to express my great gratitude to all the authors for their excellent contribution to the journal and the reviewers for their efforts in starting up this journal. It is expected that with the efforts of the great editors of the journal we receive new research articles from all parts of the world.The next volume of the journal will be published in 2010 and each manuscript is expected to be published online as soon as it passes the peer review process.

  15. Electronic journals : Some recent projects

    OpenAIRE

    McKnight, Cliff

    1999-01-01

    The paper describes three recent electronic journal projects with which the author has been involved. The first, Project ELVYN, was a collaborative project with the Institute of Physics Publishing and involved the distribution of an electronic version of a journal to eight library test sites. These libraries then made the journal available to individual readers via the local area network. The second project, Cafe Jus, looked at electronic journal use with two groups of readers: taught postgra...

  16. International Journal of Circumpolar Health

    OpenAIRE

    Production, Co-Action Publishing

    2012-01-01

    Scope and purpose. The International Journal of Circumpolar Health is published by the International Association of Circumpolar Health Publishers. The journal follows the tradition initiated by its predecessor, Arctic Medical Research. The journal specializes in circumpolar health. It provides a forum for many disciplines, including the biomedical sciences, social sciences, and humanities as they relate to human health in high latitude environments. The journal has a particular interest in th...

  17. Examining the Status and Impact Factor of Muslim Scientific Journals in ISI Database: A Bibliometric Study

    Directory of Open Access Journals (Sweden)

    Nurrollah Karami

    2010-09-01

    Full Text Available This paper employs bibliometric method for analyzing the status of journals published in muslim countries in the Journal of Citation Report, an ISI maintained database. The findings indicated that there are 37 journals from 12 muslim countries indexed in JCR. Turkey leads with nine journals indexed. Inter-disciplinary journals constitute the subject area of six journals. Bentham Science Publishers is the most active by publishing 7 journals. Turkey is the only muslim country that has two journals in social sciences. English is the main language in 86.5 percent of the journals studied. Turkish Journal of Earth Sciences has the highest impact factor. The highest citations and citation half-life belonged to Chemical National Compendium from Uzbekistan.

  18. Journal of Spatial Information Science

    OpenAIRE

    Nedjeljko Frančula

    2011-01-01

    The Journal of Spatial Information Science (JoSIS) is a new international interdisciplinary journal with open access dedicated to publishing original research and review papers related to spatial information science. Themes of the journal include computer geometry, geocomputation, spatial algorithms, geovisualization, cartography, spatial data models, web GIS, spatial databases, and location based services.

  19. Monopoly Power and Electronic Journals.

    Science.gov (United States)

    Meyer, Richard W.

    1997-01-01

    Rising periodical prices and lagging library budgets have many academics hoping that scholarly print journals will migrate to online versions. Examines economic factors shaping the electronic journal market, emerging new electronic journals, access versus ownership, consortial purchasing, self-maintained infrastructures, elimination of tenure and…

  20. Evaluation of OAS Education Journals.

    Science.gov (United States)

    Leavitt, Howard B.; And Others

    An in-depth evaluation of four Organization of American States educational journals is presented. The journals, published for distribution among Latin American countries, were "Tecnologia Educativa", "Curriculum", "Educacion de Adultors", and "La Educacion". Assessment was made of the journals' mandates, implementation procedures, and managerial…

  1. Electronic books and journals

    OpenAIRE

    Endres, A.

    1996-01-01

    Electronic books and journals are both desirable and feasible. From a user's point of view they solve some shortcomings of conventional media, but more important are the new opportunities they open. To exploit those, a number of technical challenges have to be addressed. Besides, a series of business and organisational issues have to be taken care of. The German project MeDoc had to cope with a subset of these questions and found pragmatic answers. Libraries and librarians are well adviced to...

  2. Decoupling the scholarly journal

    OpenAIRE

    Jason ePriem; Bradley H. Hemminger

    2012-01-01

    Although many observers have advocated the reform of the scholarly publishing system, improvementsto functions like peer review have been adopted sluggishly. We argue that this is due to the tightcoupling of the journal system: the system's essential functions of archiving, registration,dissemination, and certification are bundled together and siloed into tens of thousands of individualjournals. This tight coupling makes it difficult to change any one aspect of the system, choking outinnovati...

  3. Scientific Journal Indexing

    Directory of Open Access Journals (Sweden)

    Getulio Teixeira Batista

    2007-08-01

    Full Text Available It is quite impressive the visibility of online publishing compared to offline. Lawrence (2001 computed the percentage increase across 1,494 venues containing at least five offline and five online articles. Results shown an average of 336% more citations to online articles compared to offline articles published in the same venue. If articles published in the same venue are of similar quality, then they concluded that online articles are more highly cited because of their easier access. Thomson Scientific, traditionally concerned with printed journals, announced on November 28, 2005, the launch of Web Citation Index™, the multidisciplinary citation index of scholarly content from institutional and subject-based repositories (http://scientific.thomson. com/press/2005/8298416/. The Web Citation Index from the abstracting and indexing (A&I connects together pre-print articles, institutional repositories and open access (OA journals (Chillingworth, 2005. Basically all research funds are government granted funds, tax payer’s supported and therefore, results should be made freely available to the community. Free online availability facilitates access to research findings, maximizes interaction among research groups, and optimizes efforts and research funds efficiency. Therefore, Ambi-Água is committed to provide free access to its articles. An important aspect of Ambi-Água is the publication and management system of this journal. It uses the Electronic System for Journal Publishing (SEER - http://www.ibict.br/secao.php?cat=SEER. This system was translated and customized by the Brazilian Institute for Science and Technology Information (IBICT based on the software developed by the Public Knowledge Project (Open Journal Systems of the British Columbia University (http://pkp.sfu.ca/ojs/. The big advantage of using this system is that it is compatible with the OAI-PMH protocol for metadata harvesting what greatly promotes published articles

  4. Students’ Learning through Reflective Journaling

    Directory of Open Access Journals (Sweden)

    Alvyda Liuolienė

    2011-04-01

    Full Text Available The aim of the article is to get acquainted with the types of journals used in education to help students to learn. The paper presents some ways of fostering student’s learning through reflective journaling. It also describes the key aspects of a new method ARRIVE cycle in connection with teachers preparation to use reflective journals in a classroom. The article also presents self-assessment in reflective journaling and students’ need to self-evaluate their learning process. Reflective journaling as central to students’ self-evaluation is described as a means of fostering metacognition.

  5. Journal Self-Citedness in "Journal Citation Reports" Library and Information Science and Genetics Journal Rankings.

    Science.gov (United States)

    Nisonger, Thomas E.

    1998-01-01

    Investigates the effect of journal self-citedness on "Journal Citation Reports" (JCR) rankings of library and information science and genetics journals using data from 1994 on CD-ROM. Results for library and information science indicate that the effect of self-citedness on both JCR impact factor and total citation rankings was minimal. (Author/AEF)

  6. Undergraduate Economics Journals: Learning by Doing

    Science.gov (United States)

    Leekley, Robert M.; Davis-Kahl, Stephanie; Seeborg, Michael C.

    2013-01-01

    Although there are currently only a few undergraduate journals in economics, we expect their numbers to increase substantially in the future because of several developments: (1) research and writing activity is increasing in economics programs, (2) online publication is now more feasible and cost efficient than ever, and (3) students are…

  7. Introducing New Journal Feature: Teachers' Forum

    OpenAIRE

    Kramsch, Claire

    2012-01-01

    We are proud to announce the introduction of a new section in the journal, Teacher’s Forum, to be edited by Rick Kern, specifically geared towards language lecturers and graduate student instructors.The Teacher’s Forum will offer a platform to share brief, refereed reports on second and foreign language pedagogical activities and research.

  8. The handbook of journal publishing

    CERN Document Server

    Morris, Sally; LaFrenier, Douglas; Reich, Margaret

    2013-01-01

    The Handbook of Journal Publishing is a comprehensive reference work written by experienced professionals, covering all aspects of journal publishing, both online and in print. Journals are crucial to scholarly communication, but changes in recent years in the way journals are produced, financed, and used make this an especially turbulent and challenging time for journal publishers - and for authors, readers, and librarians. The Handbook offers a thorough guide to the journal publishing process, from editing and production through marketing, sales, and fulfilment, with chapters on management, finances, metrics, copyright, and ethical issues. It provides a wealth of practical tools, including checklists, sample documents, worked examples, alternative scenarios, and extensive lists of resources, which readers can use in their day-to-day work. Between them, the authors have been involved in every aspect of journal publishing over several decades and bring to the text their experience working for a wide range of ...

  9. The Double-Entry Journal in Literature Classes.

    Science.gov (United States)

    Nugent, Harold; Nugent, Susan

    The double-entry journal requires students to write affective response statements to literature readings and to compare such entries with those of classmates. Use of the double-entry journal is intended to activate students' prior learning and present feelings, foster collaborative learning, integrate major language skills, and encourage the…

  10. The Discourse of Research and Practice in Marketing Journals.

    Science.gov (United States)

    Hemais, Barbara

    2001-01-01

    Addresses how linguistic choices are used for the construction of a view of marketing activity in marketing journals that corresponds to the expectations of a particular readership. Articles in three journals were analyzed with a grammatical model of sentence subjects. Results indicate separate discourses in conceptuality and concreteness in…

  11. Five Predatory Mega-Journals: A Review

    OpenAIRE

    Beall, Jeffrey

    2013-01-01

    Mega-journals such as PLOS One are an emerging and successful model of scholarly Open Access publishing. Unfortunately, some new, questionable journals have appeared that are copying the megajournal model. This review covers the five predatory mega-journals British Journal of Science, International Journal of Current Research, International Journal of Science and Advanced Technology (IJSAT), International Journal of Sciences (IJSciences), and World Journal of Science and Technology. Each of t...

  12. Journal of Maps

    Directory of Open Access Journals (Sweden)

    Nedjeljko Frančula

    2009-12-01

    Full Text Available Journal of Maps (JoM (http://www.journalofmaps.com počeo je izlaziti 2005. godine isključivo kao elektronički časopis. Izdavač je School of Earth Sciences and Geography, Kingston University, UK. Budući da ne izlazi u tiskanom izdanju, časopis nema uobičajene sveske. Svescima se, ipak, mogu smatrati članci srodne tematike koji se objavljuju tri puta godišnje – u travnju, kolovozu i prosincu.

  13. NEW YEAR, NEW JOURNAL

    Institute of Scientific and Technical Information of China (English)

    Zunqi; Lin

    2013-01-01

    <正>We are excited to release the first issue of High Power Laser Science and Engineering(abbreviated HPLaser)at the beginning of 2013,Year of the Snake in the Chinese calendar.First of all,I would like to give our sincere thanks to those who have contributed to the publishing of the new journal.Since the invention of laser in 1960,the requirements of scientific research have driven the development of high power laser technology.Laser output power continues to increase dramatically through the development of laser technology,and many new research topics are being discovered and created.

  14. New NAS journal

    Science.gov (United States)

    In April 1984 the National Academy of Sciences (NAS) will begin publishing a new quarterly focusing on science policy. Written primarily for legislators, diplomats, corporate managers, security analysts, and other public policy analysts, the new journal will deal with such diverse topics as arms control, economic competition, social change, and health care.Original articles are expected to create a 120-page periodical that will discuss policy issues on a sophisticated but nonspecialist level, in a manner similar to that which Foreign Affairs uses to discuss U.S. foreign policy topics, according to NAS.

  15. Comparing the hydrology journals

    Science.gov (United States)

    McDonnell, Jeff

    How do the various water resources journals stack up? This question is frequently asked at scientific meetings, within promotion and tenure committees, and around graduate student lunch counters. Several years ago G. Dagan (Eos, June 20,1989) published a very useful report of findings by the Institute for Scientific Information (ISI), which publishes annual reviews of scientometric indices. I read his report just after receiving my Ph.D., and the numbers greatly influenced my choice of where to publish my dissertation. For those graduate students and water resources professionals who may benefit from the latest figures, I report my compilation of the 1995 impact factors from ISI.

  16. A Single Journal Study : Malaysian Journal of Computer Science

    OpenAIRE

    Zainab, A.N.; Anyi, K. W. U.; Anuar, N. B.

    2013-01-01

    Single journal studies are reviewed and measures used in the studies are highlighted. The following quantitative measures are used to study 272 articles published in Malaysian Journal of Computer Science, (1) the article productivity of the journal from 1985 to 2007, (2) the observed and expected authorship productivity tested using Lotka's Law of author productivity, identification and listing of core authors; (3) the authorship, co-authorship pattern by authors' country of origin and instit...

  17. A profession termed Journalism

    Directory of Open Access Journals (Sweden)

    Manuel Fernández Areal, Ph. D.

    2010-01-01

    Full Text Available New technologies can foster the impression that journalism, as a profession will become extinct probably in a short term. Anybody can have access to any information sources as well as to transmit – through Internet- all sorts of messages at an unusual speed, and this fact seems to support the idea that no technical training will be needed in the future not even an specific cultural background will be required, much less an university degree or qualification that ensures a responsible and appropriate practice of the modern social communication. The Federation of Journalists Associations in Spain (FAPE in its Draft of the Professional Statute is in favor of a graduated or qualified profession at an university level, and its Commission for Complaints has been developing a successful work regarding the professional self-regulation and self-control for the benefit of society. Therefore, there are good reasons for being optimist. Journalism, as a profession, is not going to disappear, and maybe it is time to consider it, really, as an academic qualified profession.

  18. Welcome to the Journal of Daylighting

    Directory of Open Access Journals (Sweden)

    Irfan Ullah

    2014-12-01

    Full Text Available I am delighted to welcome you to a newly launched Solarlits electronic journal: the Journal of Daylighting (JD. As the Editor-in-Chief of JD it is a great pleasure to introduce the inaugural issue of this new, open-access, bi-annual journal to readers, researchers, future authors, and colleagues. The decision by SolarLits to launch this new journal is very timely. Because the growth of lighting demand is increasing due to rising average illuminance levels in buildings, more attention has been paid to introduce daylighting in buildings, which will sustainably reduce the overall energy consumption in buildings. JD will serve as a new international platform for researchers to share advances in daylighting. As an international, peer-reviewed research journal it will exclusively cover the vibrant and diverse field of daylighting technologies and applications. JD will serve as an interdisciplinary forum for the scientific and research community active in daylighting and its applications. Topics will include, but not limited to: daylighting and hybrid lighting systems, lighting and daylighting simulation, lighting designs, lighting metrology and light quality, lighting control, building physics - lighting, building energy modeling, energy efficient buildings, zero-energy buildings, indoor environment quality, sustainable solar energy systems, application of solar energy sources in buildings, building-integrated photovoltaics, and solar thermal and concentrator technology. I will work with the Associate Editors, the Editorial Board, and the scientific and engineering research community to make JD a primary journal for the dissemination of breakthrough results, discussion of key challenges, and topics in daylighting. JD will publish full-length research articles, review articles, book reviews, and short communications.

  19. Medical Journalism and Emergency Medicine

    OpenAIRE

    Saeed Safari; Alireza Baratloo; Mahmoud Yousefifard

    2015-01-01

    Nowadays, many researches in the field of medicine are conducting all around the world and medical journalism is a way to share the results. In fact, dissemination of the related manuscripts can prevent the repetitive research or may even lead to conducting a better survey. Therefore high quality medical journals are considered as up-to-date resources for further investigations. Medical journals are propagating their papers in various media including television programs, newspapers, internet ...

  20. Journalism we don’t teach at journalism schools

    NARCIS (Netherlands)

    Bakker, Piet

    2013-01-01

    Although basic features of journalism have remained the same over the last decades, the tasks journalists perform, the skills they need and the position they have within news organizations have changed dramatically. Usually the focus in the discourse on changes in journalism is on skills, especially

  1. Good journalism or peace journalism? – Counterplea by David Loyn

    Directory of Open Access Journals (Sweden)

    David Loyn

    2007-10-01

    Full Text Available In this paper the author responds to the reasoning by Jake Lynch (“Peace journalism and its discontents” and Samuel Peleg (“In defense of peace journalism: A rejoinder”, published in the same issue of conflict & communication online (http://www.cco.regener-online.de/2007_2/inhalt6_2.htm.

  2. Journalism and science

    DEFF Research Database (Denmark)

    Meyer, Gitte

    2006-01-01

    that are likely to occur to journalistic attitudes - mirroring changing attitudes in the wider society - towards science and scientific researchers. Two journalistic conventions - those of science transmission and of investigative journalism - are presented and discussed in relation to the present drive towards...... commercialization within the world of science: how are journalists from these different schools of thought likely to respond to the trend of commercialization? Likely journalistic reactions could, while maintaining the authority of the scientific method, be expected to undermine public trust in scientists....... In the long term, this may lead to an erosion of the idea of knowledge as something that cannot simply be reduced o the outcome of negotiation between stakeholders. It is argued that science is likely to be depicted as a fallen angel. This may be countered, it is posited, by science turning human...

  3. Situating peace journalism in journalism studies: A critical appraisal

    Directory of Open Access Journals (Sweden)

    Thomas Hanitzsch

    2007-10-01

    Full Text Available Most wars were not brought to our attention if there were no journalists to report on them and no news media to send reporters to conflict spots. At the same time, the media often give priority to conflict and war at the expense of playing a positive role in attempts to bring about peace. The concept of peace journalism is, therefore, seen as an alternative model to traditional ways of war reporting. This article argues, however, that the idea of peace journalism comes as old wine in new bottles. Although carrying a noble goal, it ignores the manifold nuances in the media and tends to highlight the exceptional, spectacular and negative of war coverage. The idea of peace journalism tends to overestimate the influence journalists and the media have on political decisions; and it often understands audiences in terms of a passive mass that needs to be enlightened by virtue of peace reporting. In addition to this, peace journalism is, to a considerable extent, based on an overly individualistic perspective and ignores the many structural constraints that shape and limit the work of journalists: few personnel, time and material resources; editorial procedures and hierarchies; textual constraints; availability of sources; access to the scene and information in general - just to name a few. All this suggests that the conduct of peace journalism is not a matter of individual leeway, and media structures and professional routines cannot be modified from the position of the individual journalist. Modern corporate journalism involves processes of organized news production, thus giving priority to organizational and institutional factors as well as processes of professional socialization. To have any impact on the way the news is made, and its critical scrutiny, the advocates of peace journalism must address the structural constraints of news production. The discussion of peace journalism, and particularly of its practical implications, must be tied to the

  4. Local Evaluation of Chemistry Journals

    Science.gov (United States)

    Kraus, Joseph R.; Hansen, Rachel

    2008-01-01

    This paper reports on the evaluation of local usage statistics of a specific set of chemistry journals at the University of Denver in Colorado, USA. The objective of the study is to demonstrate that commercial publishers in chemistry charge considerably more for their journals than those from the non-commercial sector. There are three variables…

  5. Science, Journalism and Media Logic

    NARCIS (Netherlands)

    Korthagen, Iris

    2016-01-01

    Science journalism is an important distribution channel for the results and insights produced by scientific research, and as such plays an important role in shaping public opinion of science. This prompted the Rathenau Institute to study the state of science journalism. We see journalists as partner

  6. Let Us Rank Journalism Programs

    Science.gov (United States)

    Weber, Joseph

    2014-01-01

    Unlike law, business, and medical schools, as well as universities in general, journalism schools and journalism programs have rarely been ranked. Publishers such as "U.S. News & World Report," "Forbes," "Bloomberg Businessweek," and "Washington Monthly" do not pay them much mind. What is the best…

  7. Astronomy & Astrophysics: an international journal

    Science.gov (United States)

    Bertout, C.

    2011-07-01

    After a brief historical introduction, we review the scope, editorial process, and production organization of A&A, one of the leading journals worldwide dedicated to publishing the results of astrophysical research. We then briefly discuss the economic model of the Journal and some current issues in scientific publishing.

  8. Journal of Flood Risk Management

    OpenAIRE

    Nedjeljko Frančula

    2011-01-01

    The Journal of Flood Risk Management is dedicated to knowledge exchange in all fields related to flood risk. It is intended to hydrologists, meteorologists, geographers, geomorphologists, conservators, civil engineers, sociologists, etc. The journal was initiated by Chartered Institution of Water and Environmental Management and Wiley-Blackwell. It has been published in four volumes per year since 2008.

  9. Medical Journalism and Emergency Medicine

    Directory of Open Access Journals (Sweden)

    Saeed Safari

    2015-07-01

    Full Text Available Nowadays, many researches in the field of medicine are conducting all around the world and medical journalism is a way to share the results. In fact, dissemination of the related manuscripts can prevent the repetitive research or may even lead to conducting a better survey. Therefore high quality medical journals are considered as up-to-date resources for further investigations. Medical journals are propagating their papers in various media including television programs, newspapers, internet websites and different social media. So they can influence the government policy makers, health-care professionals and even public. Moreover, most researchers hear about medical discoveries for the first time through medical journals and their related social media. So as well a high quality journal can help to improve medical science, a journal of poor quality can be damaging and distorting. Indeed, popular journals have the power of inventing a “communication storm” to draw attention to a certain topic. Thus they have to respect the accepted international principles to prevent spreading inaccurate and misleading data. This paper aims to review the previous and current situation of medical journalism by focus on field of emergency medicine.

  10. Hierarchical networks of scientific journals

    CERN Document Server

    Palla, Gergely; Mones, Enys; Pollner, Péter; Vicsek, Tamás

    2015-01-01

    Scientific journals are the repositories of the gradually accumulating knowledge of mankind about the world surrounding us. Just as our knowledge is organised into classes ranging from major disciplines, subjects and fields to increasingly specific topics, journals can also be categorised into groups using various metrics. In addition to the set of topics characteristic for a journal, they can also be ranked regarding their relevance from the point of overall influence. One widespread measure is impact factor, but in the present paper we intend to reconstruct a much more detailed description by studying the hierarchical relations between the journals based on citation data. We use a measure related to the notion of m-reaching centrality and find a network which shows the level of influence of a journal from the point of the direction and efficiency with which information spreads through the network. We can also obtain an alternative network using a suitably modified nested hierarchy extraction method applied ...

  11. Journalism as Cultures of Circulation

    DEFF Research Database (Denmark)

    Bødker, Henrik

    2013-01-01

    The universe of journalism has always consisted of interspersed texts, meanings and practices. Yet, much journalism research has often isolated either texts and/or contexts and as such assumed relations between professional practices, informed (rational) readers and (conceived) core texts...... of journalism. It is, however, more important than ever to shift attention away from texts to the processes through which they are circulated. This is partly because the many cultural forms of journalism (textual, institutional, technological, material, behavioural and imagined) are undergoing significant......, likes, comments, searches, journalist roles, writing and reading positions and identities etc. Such forms will be traced within the mediation of a specific event with the overall aim of beginning a theorization of the landscape of journalism as highly interrelated cultures of circulation....

  12. Journal information flow in nanotechnology

    International Nuclear Information System (INIS)

    The nanotechnology development is accompanied by an intensive growth of information flow which is specially noticeable as applied to journal information flow. Now over the world there are the 69 nano-titled journals with the impact factor and/or a settled periodicity as well as the 70 those which lack stability periodicity and are in an organization stage. Only 49 nano-titled have the impact factor with the comparatively high mean value of about 3.44. The domestic nano-titled journals published in Russia, India, China, and other countries are also considered. The attention is taken that in the 2006–2010 period the 95 new nano-titled journals were organized and in 2011 this process is continuing and seems to be the most impressive. Many nano-related journals (including classical physical, chemical and materials science ones) are also described and discussed.

  13. FUTURE OF DERMATOVENEREOLOGICAL JOURNALS1.

    Science.gov (United States)

    Marinović, Branka

    2016-04-01

    Each year, during the Annual Meeting of the American Academy of Dermatology, there is a meeting of the Council of Dermatology Editors organized by Professor Larry Parish from Philadelphia. It is so nice to meet old friends there and make some new ones, but above all it is a very good platform to discuss the problems journals and their editors are facing today. Some of the topics we discussed during this year's meeting were the increasing number of case reports submitted to all dermatological journals, problems of plagiarism, the rising number of online journals, and the predatory policies quite often connected with them. There was also discussion on print vs online publication versions and on open access journals. It is always useful to discuss common problems, to realize that all journals have similar problems, and to exchange experiences in solving these problems. One of the problems all journals are facing is the increasing number of case reports being submitted, and their high rejection rate due to different reasons. Acta Dermatovenerologica Croatica is overloaded with case reports from many different countries around the world. Most of them are interesting, well prepared cases and could be a good way of exchanging experience between dermatologists. From my personal point of view, case reports are a very useful form of medical communication. For many years they were usually the first articles written by residents under the supervision of their mentors, and I think that all of us should insist on that in the future as well. But the problem is that it has become very difficult to find a journal willing to publish many case reports. Authors are trying to find a journal to publish their case reports in, sometimes sending them to many journals. Unfortunately, the rate of rejection of case reports is rising. And why? There are a few reasons for that, but probably one of the most important is that a high number of published case reports per issue of any journal

  14. Ranking mainstream economics journals: A note

    OpenAIRE

    Halkos, George; Tzeremes, Nickolaos

    2012-01-01

    This paper by applying Data Envelopment Analysis (DEA) ranks Economics journals. In contrast with many other studies this paper ranks journals which are characterized as mainstream economic journals rather than interciplinary economic journals. By using one composite input and one composite output the paper ranks 180 journals. In addition for the first time three different quality ranking reports have been incorporated to the DEA modelling problem in order to classify the journals into four c...

  15. Journal interaction. A bibliometric analysis of economics journals

    OpenAIRE

    Frandsen, Tove Faber

    2005-01-01

    Citation analysis is widely used as an evaluation method within sciences. This paper seeks to qualify citation analyses by adding insight into the sciences under investigation. The paper presents a method of citation analysis using multiple linear regressions on both cited and citing economic journals. The proposed method controls for the different characteristics of the journals as well as for their degree of interaction. The paper shows some of the hidden structures within the economic scie...

  16. 60 years of IUCr journals

    Science.gov (United States)

    Authier, A.

    2009-05-01

    The birth and growth of the publications and journals of the International Union of Crystallography from 1948 to 2008 are described. Details are given of the pre-war history that led up to their creation and development.

  17. Historic Climate Diaries and Journals

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Diaries and Journals containing weather information in a non-tabular format. Records date from 1735 through the early 20th century. Much of the weather and climate...

  18. Peer review and journal models

    CERN Document Server

    Dall'Aglio, P

    2006-01-01

    Tentative analysis of alternative peer review and journal models. Open Access and Impact factor issues are not covered. The bibliography, in alphabetical order, lists articles and web sites (with brief description).

  19. EDITORIAL: Changes to the journal Changes to the journal

    Science.gov (United States)

    Zheludev, Nikolay I.

    2010-01-01

    It is a privilege to be Editor-in-Chief of Journal of Optics at this exciting time when the use of light spearheads the development of new technologies in telecommunications, green energy, manufacturing, medicine and defence, just to mention a few. These technological advances, seen by many as the next photonic technological revolution, are underpinned by fundamental and applied research in the following key directions: Nanophotonics and plasmonics Metamaterials and structured photonic materials Nonlinear and ultrafast optics Photonics at the life science interface Information and communication optics Integrated optics systems and devices Material processing with light Propagation, diffraction and scattering This is where Journal of Optics focuses its attention. This editorial marks the first issue of the journal published under the abbreviated name (shortened from Journal of Optics A: Pure and Applied Optics). The name change is just one of a series of changes introduced in the last year, along with the 8 subject sections listed above and the appointment of Section Editors. With the name change, we will also update the look of the journal by introducing colour cover images which will feature some of the most exciting research in the journal. We have retained many of the journal's original selling points: we are found in thousands of libraries around the world, and will continue our policy of free web access to all papers for 30 days after publication, ensuring broad and unrestricted dissemination of your research results. We will also continue our strong and well respected special issue and topical review programmes and we are always grateful to receive new suggestions for special issues or review articles. Along with the Editorial Board, I would like to thank the authors, referees and readers who have contributed to the success of Journal of Optics. The increasing quality and visibility of the journal, as demonstrated by the dramatic increase in its impact factor

  20. Peace Journalism and its discontents

    Directory of Open Access Journals (Sweden)

    Jake Lynch

    2007-10-01

    Full Text Available This article is a response to criticisms of peace journalism from a journalist (David Loyn and a scholar (Thomas Hanitzsch by one who has recently gone from one profession to the other. It argues that journalists, like Loyn, often misrepresent the dividing lines in the debate over peace journalism because they take an unduly realist view of news and its relationship with the facts. This is tantamount to ignoring some of the most important insights of research into journalism and communications. On the other hand, scholars like Hanitzsch take an unduly conventionalist view, it argues, thereby excluding important arguments about the basis upon which we should prefer some representations of conflict over others, as being more accurate and more useful. Peace journalism bases its claims on observations about conflict, peace and violence by researchers in Peace and Conflict Studies, preferable as a basis for representing conflict to the often-unexamined conventions of the news industry. Peace journalism is also criticised as resting on an overly individualistic model of journalistic endeavour, attaching too little weight to the importance of structural constraints on the work of editors and reporters. This article acknowledges those constraints as governing, though not fully determining influences; but it also argues that peace journalism can contribute to the mobilization of social resources for structural reform, or for the existing structural provisions for public service concepts in journalism to be applied and carried out. Furthermore, some research into journalistic representations of conflict is insufficiently attentive to the insights of peace research, as distinct from research on journalism, a shortcoming which, the article says, invalidates some of its conclusions.

  1. Sustainability of a scientific journal

    OpenAIRE

    Getulio Teixeira Batista

    2014-01-01

    In this editorial, we discuss the necessary steps to guarantee the sustainability of Ambiente & Água journal as it grew in recognition by the scientific community. To publish world class scientific papers of professional quality, considerable amount of resources are necessary. Therefore, we will follow the trend of successful journals that have raised several funding sources to support the processing costs to publish in cutting edge technology that requires interoperability throughout a varie...

  2. Journal Reading Habits of Internists

    OpenAIRE

    Saint, Sanjay; Christakis, Dimitri A.; Saha, Somnath; Elmore, Joann G.; Welsh, Deborah E.; Baker, Paul; Koepsell, Thomas D

    2000-01-01

    We assessed the reading habits of internists with and without epidemiological training because such information may help guide medical journals as they make changes in how articles are edited and formatted. In a 1998 national self-administered mailed survey of 143 internists with fellowship training in epidemiology and study design and a random sample of 121 internists from the American Medical Association physician master file, we asked about the number of hours spent reading medical journal...

  3. Clinical relevance in anesthesia journals

    DEFF Research Database (Denmark)

    Lauritsen, Jakob; Møller, Ann M

    2006-01-01

    The purpose of this review is to present the latest knowledge and research on the definition and distribution of clinically relevant articles in anesthesia journals. It will also discuss the importance of the chosen methodology and outcome of articles.......The purpose of this review is to present the latest knowledge and research on the definition and distribution of clinically relevant articles in anesthesia journals. It will also discuss the importance of the chosen methodology and outcome of articles....

  4. Global Journalism Ethics: Widening the Conceptual Base

    Directory of Open Access Journals (Sweden)

    Stephen J. A. Ward

    2008-01-01

    Full Text Available For most of its history, journalism ethics has been highly practical in aim, in theorizing, and in application. Inquiry analyzed what was occurring inside newsrooms and its scope was parochial. Starting from the premise that a parochial approach no longer serves journalism, the study of journalism, or the public of journalism, in this paper it is argued that a major task of journalism ethics is to construct a more non-parochial ethics—a global journalism ethics informed by critical work from various disciplines and cultures. The discussion presented charts the trajectory of journalism ethics over several centuries to explain the role of parochialism and the limits of theorizing in journalism ethics. This historical perspective also serves as a foundation for outlining what a future journalism ethics might look like, if we widen the conceptual base by incorporating new knowledge of media from outside journalism ethics, and by redefining journalism ethics as a global enterprise.

  5. MAKING SENSE OF AUTONOMY IN INFORMATION ONLINE JOURNALISM IN CHIAPAS

    OpenAIRE

    Luis Fernando Bolaños Gordillo; Gilberto Antonio Ruiz Cáceres

    2011-01-01

    Censorship prevalent historically in the practice of journalism in Chiapas, several organizations have taken over the use of new information technologies to inform and comment on the events in Chiapas, including his own, thus creating an autonomous way of exercising this important activity.This article is the product of research done in 2010, which analyzed the influence of the EZLN in the development of a regional sense in the online journalism in Chiapas as well as the presence that gradual...

  6. Save journalism - to what end?

    Directory of Open Access Journals (Sweden)

    Tobie Wiese

    2011-08-01

    Full Text Available I was given a rather sexy heading – 'Forget the rhino, save journalism' – under which to say a few words. I would agree with the assumption that both are under threat, but while most people will have a natural inclination to save an endangered animal I’m not so sure about how many will stand up for the survival of journalism. After all, why do we need journalism? And secondly, it seems to me that much of the woes that journalism is going through at present are self-inflicted.
    It is often said, also in these turbulent economic times, that when America sneezes, the world gets a cough. It would therefore not be inappropriate to look at some of the cures that have been offered for the condition of journalism in the United States, because many of the trends that first manifested there have already made themselves felt here. To this end I will rely largely on, and refer to, work of the Committee of Concerned Journalists (CCJ, as it has been recorded by Bill Kovach and Tom Rosenstiel, in The Elements of Journalism.

  7. On the future contents of a small journal of histochemistry.

    Science.gov (United States)

    Pellicciari, C

    2012-12-10

    In the last three years, more than 70,000 scientific articles have been published in peer reviewed journals on the application of histochemistry in the biomedical field: most of them did not appear in strictly histochemical journals, but in others dealing with cell and molecular biology, medicine or biotechnology. This proves that histochemistry is still an active and innovative discipline with relevance in basic and applied biological research, but also demonstrates that especially the small histochemical Journals should likely reconsider their scopes and strategies to preserve their authorship. A review of the last three years volumes of the European Journal of Histochemistry, taken as an example of a long-time established small Journal, confirmed that the published articles were widely heterogeneous in their topics and experimental models, as in this Journal's tradition. This strongly suggests that a Journal of histochemistry should keep its role as a forum open to an audience as broad as possible, publishing papers on cell and tissue biology in a wide variety of models. This will improve knowledge of the basic mechanisms of development and differentiation, while helping to increase the number of potential authors since scientists who generally do not use histochemistry in their research will find hints for the applications of histochemical techniques to novel still unexplored subjects.

  8. Comparison of Traditional Versus Evidence-Based Journal Club Formats

    Directory of Open Access Journals (Sweden)

    Kathleen Packard, PharmD, MS, BCPS

    2011-01-01

    Full Text Available AbstractPurpose: The objective of the study was to compare a traditionally structured journal club with an evidence based structured journal club during an advanced clinical pharmacy rotation and to determine the best utilization that aligns with recent changes to the pharmacy school accreditation standards.Methods: The study included 21 students who completed journal club utilizing the traditional journal club format and 24 students who utilized an evidence based journal club format. Background characteristics, student reported beliefs, and mean critical evaluation skills scores were evaluated and compared in each group.Results: There were no statistically significant differences between the two cohorts in mean overall percentage grade for the activity. Students in the traditional cohort received significantly higher grades for the Study Analysis and Critique section (90.97 + 12.18 versus 81.25 + 11.18, P=0.01 as well as for the Preparedness section (96.11 + 8.03 versus 85.0 + 17.13, P=0.002. Students in the evidence based cohort received statistically superior grades for the Presentation Skills section (96.43 + 6.39 versus 82.47 + 14.12, P=0.0004.Conclusion: An evidence based journal club is a reasonable and effective alternative to the traditionally structured journal club when the primary objective is to assist students in understanding evidence based concepts and to apply current literature to clinical practice.

  9. An Overview and Analysis of Journal Operations, Journal Publication Patterns, and Journal Impact in School Psychology and Related Fields

    Science.gov (United States)

    Floyd, Randy G.; Cooley, Kathryn M.; Arnett, James E.; Fagan, Thomas K.; Mercer, Sterett H.; Hingle, Christine

    2011-01-01

    This article describes the results of three studies designed to understand better the journal operations, publishing practices, and impact of school psychology journals in recent years. The first study presents the results of a survey focusing on journal operations and peer-review practices that was completed by 61 journal editors of school…

  10. Journal and Article Locator (JAL): Federated Access to Electronic/Print Journals and Article Full-Text

    OpenAIRE

    Norman, Michael A.; Schlembach, Mary C.; Shelburne, Wendy Allen; Mischo, William H.

    2006-01-01

    This paper presents an overarching view of our e-resource management activities and specifically describes the UIUC Library Journal and Article Locator (JAL) system. The JAL pulls together a number of disparate search environments into one unified display without having to search each one independently of the others. With JAL, the Library provides one-stop access to both print and electronic journals at the title and article level. Resource integration has become the key component to providin...

  11. Doing it for Real: Designing Experiential Journalism Curricula that Prepare Students for the New and Uncertain World of Journalism Work

    Directory of Open Access Journals (Sweden)

    Jeanti St Clair

    2015-03-01

    Full Text Available The world of journalism in the digital age is changing faster than university curricula can keep up. News is now produced in forms and on platforms that were nonexistent 10 years ago. Journalists may increasingly generate their own work opportunities in entrepreneurial news outlets and start-ups, rather than as employees in legacy newsprint and broadcast media. Substantial workforce contraction has also occurred since 2012 as revenue in print and other traditional media has found new homes in social media and search engines, and over 1000 journalists (or 15 percent of the journalism workforce were made redundant. Journalism graduates therefore need to be flexible, innovative and enterprising to survive professionally in this evolving setting. Additionally, financial and funding pressures on universities are leading them to reduce course costs and deliver more courses online. Elongated unpaid internships provide real world experience but access to these will likely reduce as workforces continue to contract. This article considers student feedback from three authentic experiential journalism projects in light of these changing times in journalism. It explores how the performative and very practical nature of traditional and digital journalism skills may be developed through a learning-centred curriculum anchored in authentic and experiential activities and settings. The article briefly considers some of the challenges facing journalism educators in delivering such a curriculum in e-learning settings, and sets out a simple framework for supporting the development of digital media workforce readiness.

  12. Faculty Perception of Business Education Journals.

    Science.gov (United States)

    Blair, Robert B.; Balachandran, Martha E.

    2002-01-01

    Responses from 51 of 134 members of the National Association of Business Teacher Education (NABTE) rated the quality of 22 business education journals. The top two were Delta Pi Epsilon Journal and NABTE Review. Refereed and national publications rated higher than nonrefereed or state journals. Most departments did not rank journals in the…

  13. Literature and interviews on journalism studies

    DEFF Research Database (Denmark)

    Jørgensen, Asbjørn Slot

    What is necessary for the teaching of skills specific to online and cross-media journalism in new media? Danish country report for the project Integrated Journalism in Europe.......What is necessary for the teaching of skills specific to online and cross-media journalism in new media? Danish country report for the project Integrated Journalism in Europe....

  14. Creativity and Mathematics: Using Learning Journals

    Science.gov (United States)

    Coles, Alf; Banfield, Gemma

    2012-01-01

    Does the term "learning journal" readily conjure up an image of something that is part of the normal mathematics classroom? Personally, do you ever use a journal of some form to help you organise your thoughts? Or, put quite simply--what is a learning journal? It might be that you are unfamiliar with the label, but journals are one type of…

  15. Relative Influence of Professional Counseling Journals

    Science.gov (United States)

    Fernando, Delini M.; Barrio Minton, Casey A.

    2011-01-01

    The authors used social network analysis of citation data to study the flow of information and relative influence of 17 professional counseling journals. Although the "Journal of Counseling & Development" ranked very highly in all measures of journal influence, several division journals emerged as key players in the flow of information within the…

  16. The Core Journal Concept in Black Studies

    Science.gov (United States)

    Weissinger, Thomas

    2010-01-01

    Black Studies scholars have shown interest in the core journal concept. Indeed, the idea of core journals for the study of the Black experience has changed several times since 1940. While Black Studies scholars are citing Black Studies journals with frequency, they also cite traditional disciplinary journals a great deal of the time. However,…

  17. Journal of Parasitology

    OpenAIRE

    Lindsay, D S; Dubey, J.P.

    2000-01-01

    Diclazuril is a benzeneacetonitril anticoccidial that has excellent activity against the extraintestinal stages of Toxoplasma gondii and Neospora caninum. It also is highly active against intestinal coccidia of poultry. The present study examined the efficacy of diclazuril in inhibiting merozoite production of Sarcocystis neurona and Sarcocystis falcatula in bovine turbinate cell cultures. Diclazuril inhibited merozoite production by more than 80% in cultures of S. neurona or S.falcatula trea...

  18. Regarding "Semi-active control of the rocking motion of monolithic art objects" [Journal of Sound and Vibration, 374 (2016) 1-16

    Science.gov (United States)

    Cartmell, Matthew P.

    2016-09-01

    The Editor wishes to make the reader aware that the paper "Semi-active control of the rocking motion of monolithic art objects" by R. Ceravolo, M.L. Pecorelli, and L.Z. Fragonara, did not contain a direct citation of the fundamental and original work by D. Konstantinidis and N. Makris entitled "Experimental and analytical studies on the seismic response of free-standing and anchored laboratory equipment", Report No. PEER 2005/07. Pacific Earthquake Engineering Research (PEER) Center, University of California, Berkeley, 2005. The Editor regrets that this omission was not noted at the time that the above paper was accepted and published.

  19. Reliability of journal impact factor rankings

    Directory of Open Access Journals (Sweden)

    Greenwood Darren C

    2007-11-01

    Full Text Available Abstract Background Journal impact factors and their ranks are used widely by journals, researchers, and research assessment exercises. Methods Based on citations to journals in research and experimental medicine in 2005, Bayesian Markov chain Monte Carlo methods were used to estimate the uncertainty associated with these journal performance indicators. Results Intervals representing plausible ranges of values for journal impact factor ranks indicated that most journals cannot be ranked with great precision. Only the top and bottom few journals could place any confidence in their rank position. Intervals were wider and overlapping for most journals. Conclusion Decisions placed on journal impact factors are potentially misleading where the uncertainty associated with the measure is ignored. This article proposes that caution should be exercised in the interpretation of journal impact factors and their ranks, and specifically that a measure of uncertainty should be routinely presented alongside the point estimate.

  20. Concentration in Knowledge Output: A case of Economics Journals

    Directory of Open Access Journals (Sweden)

    Paul Gopuran Devassy Bino

    2005-12-01

    Full Text Available This paper assesses the degree of author concentration in seven economics journals, which were published in India during 1990-2002. To measure the degree of author concentration, Lotka's Law was used. Moreover, we also make an exploratory analysis of the geographic, economics subfield and institutional concentration in 704 economics journals. An important finding of this paper is that specialized journals in the sample report the highest degree of author concentration. This result is quite similar to the findings by Cox and Chung (1991. Furthermore, there are several instances showing that the journals lean towards certain norms; this may affect the flow of innovative ideas into economics. We conclude that a knowledge activity, involving the high degree of concentration and a biased publication process, may affect the flow of new ideas into the discipline.

  1. Models and Streams of Data Journalism

    OpenAIRE

    Uskali, Turo; Kuutti, Heikki

    2015-01-01

    This paper presents the initial results of a two-year research project, Data Journalism Work Practices, which focuses on newsrooms in Finland, the UK and the US. Data journalism or data-driven journalism has been defined simply as journalism based on large data sets (Rogers 2011; Bounegru et al. 2012.) According to our ongoing research on data journalism work methods, we can claim this has been an oversimplification. Based on six interviews of leading Finnish, American and British...

  2. Editorial: Journal of Contemporary Medical Sciences

    OpenAIRE

    Prof. Dr. Abbas Matrood Bashi

    2016-01-01

    In the first years of the journal life the Journal of Contemporary Medical Sciences (JCMS) acquired high successful rate and more researchers to publish with it. We thank all the researchers and subscribers who supported this magazine. Our journal deals with different subjects of basic and clinical medical sciences. It is an open access, peer-reviewed journal which has been accepted both nationally and internationally and encourages the researchers to publish with this journal. This journa...

  3. Final Technical Progress Report; Closeout Certifications; CSSV Newsletter Volume I; CSSV Newsletter Volume II; CSSV Activity Journal; CSSV Final Financial Report

    Energy Technology Data Exchange (ETDEWEB)

    Houston, Johnny L [PI; Geter, Kerry [Division of Business and Finance

    2013-08-23

    This Project?s third year of implementation in 2007-2008, the final year, as designated by Elizabeth City State University (ECSU), in cooperation with the National Association of Mathematicians (NAM) Inc., in an effort to promote research and research training programs in computational science ? scientific visualization (CSSV). A major goal of the Project was to attract the energetic and productive faculty, graduate and upper division undergraduate students of diverse ethnicities to a program that investigates science and computational science issues of long-term interest to the Department of Energy (DoE) and the nation. The breadth and depth of computational science?scientific visualization and the magnitude of resources available are enormous for permitting a variety of research activities. ECSU?s Computational Science-Science Visualization Center will serve as a conduit for directing users to these enormous resources.

  4. Designing the Next-Generation Chemistry Journal: The Internet Journal of Chemistry.

    Science.gov (United States)

    Bachrach, Steven M.; Burleigh, Darin C.; Krassivine, Anatoli

    1998-01-01

    Discusses how the journal "Internet Journal of Chemistry" is designed to take advantage of newly available technologies. Describes the development of the concept of an electronic journal, decision-making on the scope and coverage of the journal, financial logistics, and how the journal will be implemented. Includes perspectives on how this new…

  5. High-impact medical journals and peace: a history of involvement.

    Science.gov (United States)

    Bloom, Joshua D; Sambunjak, Dario; Sondorp, Egbert

    2007-01-01

    The aim of this study is to explore the positions of five leading general medical journals (The Lancet, British Medical Journal--BMJ, Journal of American Medical Association--JAMA, New England Journal of Medicine--NEJM, and Annals of Internal Medicine--AIM) toward the issues of collective violence. We calculated the proportion of war-related articles in the total number of articles published in these five high-impact journals, and in the total number of articles indexed in PubMed during the last 60 years. The results showed a continuous increase in the proportion of war-related articles. Our findings suggest that the leading general medical journals have taken an active editorial stance toward the issues of war and peace. We conclude that high-impact medical journals can make an important contribution to efforts aimed at reducing the risks and consequences of war and violence.

  6. Can Scientific Journals be Classified in terms of Aggregated Journal-Journal Citation Relations using the Journal Citation Reports?

    CERN Document Server

    Leydesdorff, Loet

    2009-01-01

    The aggregated citation relations among journals included in the Science Citation Index provide us with a huge matrix which can be analyzed in various ways. Using principal component analysis or factor analysis, the factor scores can be used as indicators of the position of the cited journals in the citing dimensions of the database. Unrotated factor scores are exact, and the extraction of principal components can be made stepwise since the principal components are independent. Rotation may be needed for the designation, but in the rotated solution a model is assumed. This assumption can be legitimated on pragmatic or theoretical grounds. Since the resulting outcomes remain sensitive to the assumptions in the model, an unambiguous classification is no longer possible in this case. However, the factor-analytic solutions allow us to test classifications against the structures contained in the database. This will be demonstrated for the delineation of a set of biochemistry journals.

  7. IDEAL: ACADEMIC PRESS JOURNALS ONLINE

    CERN Multimedia

    The Library

    2001-01-01

    All Academic Press journals are available online to CERN users for a test period which will last until the end of July. The service 'IDEALIBRARY' includes 174 scientific journals that cover several domains, ranging from engineering to mathematics, computing and physics. Titles covered are among others 'Atomic Data and Nuclear Data Tables', 'Nuclear Data Sheets', 'Annals of Physics', 'Journal of Parallel and Distributed Computing'. Reference citations present in each article are linked to the corresponding full text, when the latter is published by a member of the CrossRef consortium (members are: Elsevier, APS, AIP and others). Therefore, the navigation between articles and references is uninterrupted. A search engine allows queries by author, title and publication year. See http://www.idealibrary.com. At present the Library is evaluating a site license offer proposed by the publisher.

  8. Narrative journalism as complementary inquiry

    Directory of Open Access Journals (Sweden)

    Jørgen Jeppesen

    2011-10-01

    Full Text Available Narrative journalism is a method to craft stories worth reading about real people. In this article, we explore the ability of that communicative power to produce insights complementary to those obtainable through traditional qualitative and quantitative research methods. With examples from a study of journalistic narrative as patient involvement in professional rehabilitation, interview data transcribed as stories are analyzed for qualities of heterogeneity, sensibility, transparency, and reflexivity. Building on sociological theories of thinking with stories, writing as inquiry, and public journalism as ethnography, we suggest that narrative journalism as a common practice might unfold dimensions of subjective otherness of the self. Aspiring to unite writing in both transparently confrontational and empathetically dialogic ways, the narrative journalistic method holds a potential to expose dynamics of power within the interview.

  9. Is journalism failing on climate?

    Science.gov (United States)

    Rahmstorf, Stefan

    2012-12-01

    How can we build a reliable and affordable energy supply based on renewables? How rapidly do we need to cut greenhouse gas emissions to keep climate change within manageable bounds? What does it take to maintain a stable common currency of different nations? These are just a few examples of questions that are critical for our future and that require an understanding of complex systems—the energy system, the climate system, the financial system. Finding sound answers to these questions requires sophisticated scientific analysis and expert knowledge; a lay person's intuition will clearly not suffice. Yet, decisions in a democracy are (and should be!) taken by politicians and the voting public who are not usually scientific experts. Hence the well-being of our societies—and even more so the living conditions of future generations, which are defined by the decisions we take today—depends on the wider public being well informed about the state of scientific knowledge and discourse. The media are the most important means by which lay people obtain their information about science. Good science journalism is therefore a decisive factor for the long-term success of modern society. Good science journalism clearly must be critical journalism, and it requires journalists who know what is what, who can put things into a perspective, and who are able to make well-informed judgements. After all, the role of science journalism is not simply to act as a 'translator' who conveys the findings of scientists in a language understandable to lay people. Rather, good science journalism will provide the public with a realistic impression of what is well established in science and what are current 'hot topics', uncertainties and controversies. It will also discuss the methods and social context of the scientific endeavour. There is ample evidence that in the area of climate science, journalism too often is failing to deliver this realistic picture to its audience, despite many good

  10. Auditing the British Medical Journal.

    OpenAIRE

    Channer, K S

    1994-01-01

    The purpose of this study was to audit the outcome in terms of change in practice of the published research from one volume of the British Medical Journal. All original papers and short reports from one Volume 296 of the British Medical Journal (BMJ) 1988 were read and classified into theoretical only, practical and theoretical and practical. Those papers with any practical message were reviewed by one of a panel of specialists in the subject of the paper to assess if the recommendation made ...

  11. Journal of Development Studies

    OpenAIRE

    Hou, X.H.

    2010-01-01

    This study uses cross-sectional time-series data to examine the relationship between wealth and child labour and schooling in Pakistan and finds that wealth is crucial in determining a child's activities, but is far from being a sufficient condition to enrol a child in school. This is particularly the case for rural girls. Nonparametric analysis shows a universal increase in school enrolment for rural girls from 1998-2006 and this increase is independent of wealth. Multinomial logit regressio...

  12. MUSIC RADIO-JOURNALISM

    OpenAIRE

    Dubovtceva Ludmila I.

    2014-01-01

    The article is based on years of practical experience, the author highlights the main radio genres in which music correspondent, music reviewer, music commentator, and music leading and a disc jockey work. Theoretical principles of their creative activities are analyzed in common journalistic genres, such as interview, reportage, talk show, live broadcast, radiofilm, as well as specialized genres like concert on demand and music competition. Journalist’ speech is seen as a logical element, th...

  13. Journal Editing and Ethical Research Practice: Perspectives of Journal Editors

    Science.gov (United States)

    Randell-Moon, Holly; Anderson, Nicole; Bretag, Tracey; Burke, Anthony; Grieshaber, Sue; Lambert, Anthony; Saltmarsh, David; Yelland, Nicola

    2011-01-01

    This article offers perspectives from academics with recent journal editing experience on a range of ethical issues and dilemmas that regularly pose challenges for those in editorial roles. Each contributing author has provided commentary and reflection on a select topic that was identified in the research literature concerning academic publishing…

  14. Memoires d'apprendre: journal (Memories of Learning: Journal).

    Science.gov (United States)

    Allouche, Victor

    1990-01-01

    A French teacher's journal notes about his experience as a student in an intensive English course in a foreign country are presented. The notes address aspects of the language learning experience, including unfamiliar cultural context, intrusion of the new language into daily thought, resistance, translation, interference, and motivation. (MSE)

  15. Citizen Journalism & Public Interfaces

    DEFF Research Database (Denmark)

    Brynskov, Martin; Strøbech, Kristian; Bang, Jørgen

    2011-01-01

    followed the upstart of Dinby.dk in 2008 and has returned to the experiment in 2010. Our main interest is to explore the condition in which it is possible to create hyper local citizens produced digital content. And, furthermore, to understand which incitements are needed to make local actors or groups act...... as digital providers of their own activities. In the paper we present our findings and reflect them in relation to the design of the web-portal and the profile of the users. Finally we discuss the further perspectives of this form of user/citizens involvement in public communication....

  16. Application of Tilting-pad bearing on H400 Air Compressor%可倾瓦轴承在H400空压机上的应用

    Institute of Scientific and Technical Information of China (English)

    雷大国

    2004-01-01

    我公司制氧分厂的H400空压机的转子中1~4级叶轮轴承原为开封空分设备提供的椭圆轴承,在使用中各级叶轮轴承的温度偏高,振动也较大。轴承型线即使微小的变化也会对轴承的温度和振动产生较大的影响,且每次大修更换很不方便。为解决这一问题,经与沈阳鼓风机厂合作,将椭圆轴承更换为该厂生产的可倾瓦轴承。

  17. Calculation methods for steadily loaded, off-set pivot, tilting pad thrust bearings. (Guide to use of computer program A9235.)

    Science.gov (United States)

    1992-12-01

    ESDU 92035 provides details of a FORTRAN program that implements the calculation method of ESDU 83004. It allows performance analysis of an existing design, or the design of a bearing dimensions, subject to any space constraint, are recommended. The predicted performance includes the lubricant film thickness under load, its temperature and flow rate, the power loss, and the bearing temperature. Recommendations are also made on surface finish. Warning messages are output in the following cases, for each of which possible remedial actions are suggested: drain or pad temperature too high, churning losses too great, film thickness too small, pad number too high, ratio or inner to outer pad radius too large, flow rate too great, lubricant or pad temperature outside usable range. A lubricant database is provided that may be extended or edited. The program applies to Newtonian lubricants in laminar flow. Worked examples illustrate the use of the program.

  18. 四瓦可倾瓦轴承瓦块摆动特性%Swing Characteristic of Pads in Four-pad Tilting Pad Bearing

    Institute of Scientific and Technical Information of China (English)

    朱爱斌; 杨玉磊; 陈渭; 袁小阳

    2014-01-01

    以第四代核电机组高温气冷堆氦风机导轴承为对象,系统研究四瓦可倾瓦轴承的瓦块摆动特性.理论推导得出量纲一瓦块摆角取决于轴承结构参数、预负荷和偏心率,但是与轴承间隙比、轴颈转速和润滑油黏度无关.数值分析表明:瓦块摆角特性由瓦块与载荷周向相对位置、预负荷和偏心率决定.轴承结构参数确定时,与载荷正对瓦块的摆角曲线的形状取决于预负荷,预负荷小于0.5时其摆角随偏心率增大先增加后减小,预负荷大于0.5时摆角则随偏心率的增大而逐渐减小;与载荷侧对瓦块的摆角在预负荷较小时随偏心率增大一直增大或减小,预负荷较大时则随偏心率的增大先保持不变然后减小.瓦块摆角对最小油膜厚度影响很大,瓦块摆角可能为负值,从而使最小油膜厚度较固定瓦时的最小油膜厚度偏大.研究结果为氦风机安全运行分析提供了依据.

  19. Surfacing of Tilt Pad Bearings in Flue Gas Turbine-expander%YL型烟汽轮机可倾瓦轴承座的堆焊

    Institute of Scientific and Technical Information of China (English)

    韩育民; 邱艳芳; 任旭阳

    2007-01-01

    制定了35CrMo调质钢堆焊的工艺,该工艺通过控制堆焊焊条化学成分、预热温度、焊接电流及焊后热处理工艺,使堆焊后轴承座接触面的力学性能达到技术要求,并较好的克服了焊接中易出现的各种缺陷.

  20. 可倾瓦轴承损伤的振动特征及诊断%Vibration Characteristics of Tilting-pad Bearing Damage and Its Diagnosis

    Institute of Scientific and Technical Information of China (English)

    郭玉杰

    2010-01-01

    通过对某机组可倾瓦发生的非正常低频振动进行测试,诊断出了振动故障.查明了瓦块损坏是导致振动的主要原因,更换损伤轴承和调整中心后振动得以消除.

  1. Experimental Test of Dynamic Characteristics of Tilting Pad Thrust Bearing%线支撑可倾瓦推力轴承性能的实验研究

    Institute of Scientific and Technical Information of China (English)

    吴兵; 臧春阳; 孙云昊; 华子恺; 金健; 郭安楠; 王小静

    2014-01-01

    设计、制造一新型推力滑动轴承试验台,并对不同工况下可倾瓦推力滑动轴承的动、静特性进行试验研究.该实验台能自动进行数据采集处理,可以完成油膜温度、压力以及动载工况下轴承座相对位移和绝对位移等参数的测量,为推力滑动轴承静动特性的理论研究提供了试验依据.

  2. 可倾瓦轴承预负荷对转子稳定性的影响%Effects of Tilting Pad Bearing Preload on the Rotor Stability

    Institute of Scientific and Technical Information of China (English)

    肖萍; 陈彦峰; 李启行; 王维民

    2015-01-01

    The effects of preload of bearing on log decrement, pad temperature, power consumption and lube consumption were investigated in this paper by combining the practical industrial centrifugal compressor with the main purpose to improve the stability of rotor system. Based on this, a new tilting bearing structure with mixed preload was studied according to the load distribution on the different pads, and the result indicated that the bearing with mixed preload handled both stability characteristic of low preload bearing and high capacity of high preload bearing, and it had even lowered pad temperature and power consumption.%本文以提高转子系统稳定性为主要目标,结合实际的工业离心压缩机,研究轴承预负荷对对数衰减率、瓦温、功率损耗以及润滑油量的影响。并在此基础上,根据不同瓦块的受载分布,研究混合型预负荷的可倾瓦轴承,结果表明:混合型预负荷轴承具有低预负荷的稳定性特性,也兼有高预负荷支撑能力强的特性,并且还具有更低的瓦温和功率损耗。

  3. The 2010 Rankings of Chemical Education and Science Education Journals by Faculty Engaged in Chemical Education Research

    Science.gov (United States)

    Towns, Marcy H.; Kraft, Adam

    2012-01-01

    Faculty active in chemical education research from around the world ranked 22 journals publishing research in chemical education and science education. The results of this survey can be used to supplement impact factors that are often used to compare the quality of journals in a field. Knowing which journals those in the field rank as top tier is…

  4. On the future contents of a small journal of histochemistry

    Directory of Open Access Journals (Sweden)

    C. Pellicciari

    2012-12-01

    Full Text Available In the last three years, more than 70,000 scientific articles have been published in peer reviewed journals on the application of histochemistry in the biomedical field: most of them did not appear in strictly histochemical journals, but in others dealing with cell and molecular biology, medicine or biotechnology. This proves that histochemistry is still an active and innovative discipline with relevance in basic and applied biological research, but also demonstrates that especially the small histochemical Journals should likely reconsider their scopes and strategies to preserve their authorship. A review of the last three years volumes of the European Journal of Histochemistry, taken as an example of a long-time established small Journal, confirmed that the published articles were widely heterogeneous in their topics and experimental models, as in this Journal’s tradition. This strongly suggests that a Journal of histochemistry should keep its role as a forum open to an audience as broad as possible, publishing papers on cell and tissue biology in a wide variety of models. This will improve knowledge of the basic mechanisms of development and differentiation, while helping to increase the number of potential authors since scientists who generally do not use histochemistry in their research will find hints for the applications of histochemical techniques to novel still unexplored subjects.

  5. Changes in Journal Financial Management

    Science.gov (United States)

    Editorial Staff, Jce

    2009-06-01

    This report announces the retirement of Mary Orna from the position of Publication Manager of JCE and gives information on the Board of Publication decision to change the management of the Journal 's business and financial affairs to a new system consisting of a treasurer and a business manager, and announces the appointments to those positions.

  6. Journal-Induced Historical Myopia.

    Science.gov (United States)

    Burlbaw, Lynn M.

    2000-01-01

    School reform implementations most often proceed from an ahistorical position. A study analyzing articles in three volumes of each of two education journals ("Phi Delta Kappan" and "Educational Leadership") revealed that 17 to 48 percent had no references to support assertions; few references were older than 15 years. (Contains 11 references.)…

  7. Television Journalism During Terror Attacks

    DEFF Research Database (Denmark)

    Mogensen, Kirsten

    This article views television news coverage of ongoing terrorist attacks and their immediate aftermath as a special genre within journalism, and describes norms connected with the genre. The description is based on qualitative analyses of the coverage on the major American networks in the fi rst ...

  8. Chiropractic & Osteopathy. A new journal

    Directory of Open Access Journals (Sweden)

    Walker Bruce F

    2005-04-01

    Full Text Available Abstract Both chiropractic and osteopathy are over a century old. They are now regarded as complementary health professions. There is an imperative for both professions to research the principles and claims that underpin them, and the new journal Chiropractic & Osteopathy provides a scientific forum for the publication of such research.

  9. The Future of Electronic Journals.

    Science.gov (United States)

    Varian, Hal R.

    It is widely expected that a great deal of scholarly communication will move to an electronic format. This paper speculates about the impact this movement will have on the form of scholarly communication. In order to understand how journals might evolve, the paper begins with a look at the demand and supply for scholarly commutation today, as well…

  10. Chiropractic & Osteopathy. A new journal

    OpenAIRE

    Walker Bruce F; French Simon D; Cameron Melainie

    2005-01-01

    Abstract Both chiropractic and osteopathy are over a century old. They are now regarded as complementary health professions. There is an imperative for both professions to research the principles and claims that underpin them, and the new journal Chiropractic & Osteopathy provides a scientific forum for the publication of such research.

  11. THE LIST OF JOURNALS ABSTRACTED

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    Academic Journal of the First Medical University of PLA; Acad J Ist Med Univ PLA Acta Academiae Medicinae Bengbu; Acta Acad Med Bengbu Acta Academiae Medicinae Hebei; Acta Acad Med Hebei Acta Academiae Medicinae Nanjing; Acta Acad Med Nanjing Acta Academiae Medicinae Nantong; Acta Acad Med Nantong

  12. Political journalism in comparative perspective

    NARCIS (Netherlands)

    E. Albæk; A. van Dalen; N. Jebril; C.H. de Vreese

    2014-01-01

    Political journalism is often under fire. Conventional wisdom and much scholarly research suggest that journalists are cynics and political pundits. Political news is void of substance and overly focused on strategy and persons. Citizens do not learn from the news, are politically cynical, and are d

  13. A course in Peace Journalism

    Directory of Open Access Journals (Sweden)

    Jake Lynch

    2007-04-01

    Full Text Available This article sets out a reasoned and annotated plan for a short course in Peace Journalism, suitable for teaching to students of Journalism, Communications, Media and Peace and Conflict Studies. It is based on courses the author has taught, over many years, and the aim of the article is to help teachers to devise their own courses. The best way to help students to begin thinking about issues in the representation of conflicts, the article argues, is to give them a flavour of it, by showing them different ways in which the same story can be told. The article gives story-boards and scripts for two television news treatments of the same event, a bombing in the Philippines. The first is an example of War Journalism, it is argued; the second, Peace Journalism. The article suggests ways to develop a course from this illustrative starting point, to ask why the distinctions between these two approaches should be considered important - both in their own terms, and in terms of their potential influence on the course of events in conflict. Different approaches to conceptualising and measuring this possible influence are discussed, with suggestions for further exploration. The article recounts some of the author's experiences in introducing and discussing what is, inevitably sometimes, difficult and sensitive material, with groups including participants from conflict-affected countries - Palestine, Israel and the Philippines. Not all students will be aspiring journalists. The article offers brief notes on practical Peace Journalism, as well as showing how learning outcomes can be formulated to allow the same issues to be tackled in the form of a civil society campaign, or as a peace-building intervention in conflict. The article also explains how students can be equipped to question elements of journalistic practice which they may take for granted, and which pass unexamined in many current journalism courses. That, in turn, entails examining the emergence

  14. Are claims made in orthodontic journal advertisements evidence-supported?

    OpenAIRE

    Livas, Christos; Kouskoura, Thaleia; Ren, Yijin; Katsaros, Christos; Pandis, Nikolaos

    2015-01-01

    OBJECTIVE To examine the supporting evidence of advertisements published in six leading orthodontic journals. MATERIALS AND METHODS The 2012-2013 printed issues of American Journal of Orthodontics and Dentofacial Orthopedics, Australian Orthodontic Journal, Journal of Orthodontics, European Journal of Orthodontics, Journal of Clinical Orthodontics, and Journal of Orofacial Orthopedics were screened for advertisements implying superior performance compared with competitor products....

  15. Clinical trial registration in oral health journals.

    Science.gov (United States)

    Smaïl-Faugeron, V; Fron-Chabouis, H; Durieux, P

    2015-03-01

    Prospective registration of randomized controlled trials (RCTs) represents the best solution to reporting bias. The extent to which oral health journals have endorsed and complied with RCT registration is unknown. We identified journals publishing RCTs in dentistry, oral surgery, and medicine in the Journal Citation Reports. We classified journals into 3 groups: journals requiring or recommending trial registration, journals referring indirectly to registration, and journals providing no reference to registration. For the 5 journals with the highest 2012 impact factors in each group, we assessed whether RCTs with results published in 2013 had been registered. Of 78 journals examined, 32 (41%) required or recommended trial registration, 19 (24%) referred indirectly to registration, and 27 (35%) provided no reference to registration. We identified 317 RCTs with results published in the 15 selected journals in 2013. Overall, 73 (23%) were registered in a trial registry. Among those, 91% were registered retrospectively and 32% did not report trial registration in the published article. The proportion of trials registered was not significantly associated with editorial policies: 29% with results in journals that required or recommended registration, 15% in those that referred indirectly to registration, and 21% in those providing no reference to registration (P = 0.05). Less than one-quarter of RCTs with results published in a sample of oral health journals were registered with a public registry. Improvements are needed with respect to how journals inform and require their authors to register their trials.

  16. Networking Journalism Studies: Towards a World Journalism Survey

    OpenAIRE

    Thomas Hanitzsch

    2011-01-01

    Most scholars argue that cross-national research is indispensable for establishing the generalizability of theories and the validity of interpretations derived from single-nation studies. Another important aspect of comparative studies is that they force us to test our interpretations against cross-cultural diferences and inconsistencies. In journalism studies, the advantages of cross-national research are obvious. While the empirical inquiry into news-making has generated a vast quantity of ...

  17. Editorial: Biotechnology Journal's diverse coverage of biotechnology.

    Science.gov (United States)

    Wink, Michael

    2014-03-01

    This issue of Biotechnology Journal is a regular issue edited by Prof. Michael Wink. The issue covers all the major focus areas of the journal, including medical biotechnology, synthetic biology, and novel biotechnological methods.

  18. Students Must be Taught to Think about Journalism.

    Science.gov (United States)

    Picard, Robert G.

    1985-01-01

    Discusses myths of journalism that are perpetuated in undergraduate journalism classes. Describes techniques for teaching undergraduates to take a more critical stance concerning journalism issues. (HTH)

  19. THE BIRTH OF A NEW JOURNAL

    OpenAIRE

    Hari Kumar, K.V.S.; Veerendra Kumar Arumalla

    2012-01-01

    On behalf of all members of the editorial board, we welcome you to our new online journal, International Journal of Medical and Health Sciences. In this era of explosive growth of knowledge and publishing, we have the audacity to launch this journal to correct the anomalies related to the research productivity from India. Our efforts in delivering this baby originated from a prolonged unfavorable experience with the existing medical journals published from India. Most of the authors publishin...

  20. Aerospace—An Open Access Journal

    OpenAIRE

    Konstantinos Kontis

    2014-01-01

    Welcome to Aerospace, an open journal covering aerospace science, engineering and technology. We seek to publish theoretical, fundamental, and applied results linked to potential applications related to research, design, manufacture, operations, control and maintenance of aircraft and spacecraft. A full description of the journal scope can be found on the journal website [1].[...

  1. Aerospace—An Open Access Journal

    Directory of Open Access Journals (Sweden)

    Konstantinos Kontis

    2014-11-01

    Full Text Available Welcome to Aerospace, an open journal covering aerospace science, engineering and technology. We seek to publish theoretical, fundamental, and applied results linked to potential applications related to research, design, manufacture, operations, control and maintenance of aircraft and spacecraft. A full description of the journal scope can be found on the journal website [1].[...

  2. A Researcher's Guide to Health Education Journals.

    Science.gov (United States)

    Laflin, Molly T.; Horowitz, Stephen M.; Nims, Julia K.

    1999-01-01

    Developed a tool to help health-education researchers match manuscript submissions with the most appropriate journals. The Delphi method was used to elicit information from health-education leaders/scholars on primary content areas in health education, preeminent journals, and information about the journals. The results include nine categories and…

  3. AsMA journal covers, a history.

    Science.gov (United States)

    Day, Pamela C

    2014-01-01

    The cover of our journal has changed quite often over the years. As we look forward to changing the name and design of the journal, it seems appropriate to reflect on the previous journal titles and covers. A brief history follows.

  4. Journal Writing: Enlivening Elementary Linear Algebra.

    Science.gov (United States)

    Meel, David E.

    1999-01-01

    Examines the various issues surrounding the implementation of journal writing in an undergraduate linear algebra course. Identifies the benefits of incorporating journal writing into an undergraduate mathematics course, which are supported with students' comments from their journals and their reflections on the process. Contains 14 references.…

  5. Journaling: A Bridge between School and Home

    Science.gov (United States)

    McGough, Julie

    2013-01-01

    This article describes how first-grade students create meaningful communication with families and help build the student-teacher-parent relationship through journaling. Journals are a useful tool to bridge school and home. A journal can communicate learning goals, develop scientific vocabulary, and create dialogue through oral and written…

  6. Reflective Journals: A Review of the Literature

    Science.gov (United States)

    Lindroth, James T.

    2015-01-01

    The use of reflective journals has been identified as an effective tool to promote reflection in preservice teachers. This review of literature provides the reader with an understanding of the various ways journals are used and assessed in teacher education programs. The findings of this review outline the use of reflective journals on topics such…

  7. Reference List Accuracy in Social Work Journals

    Science.gov (United States)

    Spivey, Christina A.; Wilks, Scott E.

    2004-01-01

    This exploratory study investigated the rate of citation errors in the reference lists of five social work journals. High error rates have been found in journals in fields such as medicine and psychology but have not yet been investigated in social work journals. A stratified, computer-generated random sample was selected (N = 500, 100 per…

  8. Biomedical Journals and the World Wide Web.

    Science.gov (United States)

    Schoonbaert, Dirk

    1998-01-01

    Discusses the publication of biomedical journals on the Internet. Highlights include pros and cons of electronic publishing; the Global Health Network at the University of Pittsburgh; the availability of biomedical journals on the World Wide Web; current applications, including access to journal contents tables and electronic delivery of full-text…

  9. Transformation of Communication Processes: Data Journalism

    OpenAIRE

    Radchenko Irina; Kayser-Bril Nicolas; Valeeva Anastasia

    2016-01-01

    This article gives a brief review of the history of data journalism, as well as the prerequisites for its appearance. The authors describe the advantages of employing data-journalism skills in the newsrooms. Finally, the article provides a review of data-driven journalism projects all over the world, state of art 2014.

  10. ICT Use by Journalism Professors in Colombia

    Science.gov (United States)

    Hung, Elias Said

    2011-01-01

    This article analyses how journalism professors at Colombian universities use information and communications technologies (ICT) in their teaching. Survey data was obtained during the first trimester of 2009 from 63 professors in journalism departments and from a total of 865 professors who are affiliated with journalism departments at 29…

  11. Mechatronics Applied to Fluid Film Bearings: Towards More Efficient Machinery

    DEFF Research Database (Denmark)

    Cerda Varela, Alejandro Javier

    Film Bearings: Towards more Efficient Machinery" was aimed at improving the state of the art regarding the usage of fluid film bearings as "smart" machine elements. Specifically, this project dealt with a tilting pad journal bearing design that features a controllable lubrication system, capable...

  12. Demystifying the reflective clinical journal

    International Nuclear Information System (INIS)

    Student learning on clinical placement is a complex issue and cannot be defined solely by just doing things. Reflection during clinical practice is essential if the student is going to learn from the experience. Therefore it is important for educators to include as part of clinical education programs learning strategies that encourage reflection. The reflective clinical journal is an educational tool that is employed by the School of Medical Radiation Sciences at the University of Sydney to encourage reflection of undergraduate radiation therapy students whilst on clinical placement. This discussion paper explores the key concepts of reflection and the reflective clinical journal. Due to the paucity of information about this issue in radiation therapy the literature reviewed is from across all areas of the health sciences

  13. The knowledge base of journalism

    DEFF Research Database (Denmark)

    Svith, Flemming

    not have a series of exhaustive categories. This also applies to which characteristics the five knowledge rationales have in various parts of journalism and in various times. This includes, for example, what it means for journalists that something is worth doing. Or what do journalists perceive as useful......In this paper I propose the knowledge base as a fruitful way to apprehend journalism. With the claim that the majority of practice is anchored in knowledge – understood as 9 categories of rationales, forms and levels – this knowledge base appears as a contextual look at journalists’ knowledge....... It is an analytical framework to delineate what is special in journalists’ knowledge. While the base is referred to in singular, it makes good sense to talk about journalistic knowledge in plural, because of the variation in the categories’ specific content and significance. This depends on the field position, time...

  14. Quality of pharmaceutical advertisements in medical journals: a systematic review.

    Directory of Open Access Journals (Sweden)

    Noordin Othman

    than 28% of claims were unambiguous clinical claims. Most advertisements with quantitative information provided risk results as relative risk reduction. Studies were conducted in 26 countries only and then the generalizability of the results is limited. CONCLUSIONS: Evidence from this review indicates that low quality of journal advertising is a global issue. As information provided in journal advertising has the potential to change doctors' prescribing behaviour, ongoing efforts to increase education about drug promotion are crucial. The results from our review suggest the need for a global pro-active and effective regulatory system to ensure that information provided in medical journal advertising is supporting the quality use of medicines.

  15. Redesigning journal club in residency

    OpenAIRE

    Al Achkar M

    2016-01-01

    Morhaf Al Achkar Department of Family Medicine, Indiana University, Indianapolis, IN, USA Abstract: The gap between production and implementation of knowledge is the main reason for the suboptimal quality of health care. To eliminate this gap and improve the quality of patient care, journal club (JC) in graduate medical education provides an opportunity for learning the skills of evidence-based medicine. JC, however, continues to face many challenges mainly due to poorly defined goals, inadeq...

  16. Comparison of Journal Citation Reports and Scopus Impact Factors for Ecology and Environmental Sciences Journals

    Science.gov (United States)

    Gray, Edward; Hodkinson, Sarah Z.

    2008-01-01

    Impact factors for journals listed under the subject categories "ecology" and "environmental sciences" in the Journal Citation Reports database were calculated using citation data from the Scopus database. The journals were then ranked by their Scopus impact factor and compared to the ranked lists of the same journals derived from Journal…

  17. CERN Library - Scientific journal cancellations

    CERN Multimedia

    2004-01-01

    Due to the constant increase of the subscription costs of scientific journals and the current budget restrictions, the Scientific Information Policy Board has mandated the Working Group for Acquisitions (WGA) together with the Library to propose a list of titles to be cancelled at the end of 2004. As a first step, the WGA has identified the scientific journals listed at the web site below as candidates for cancellation. The choice has been guided by the personal experience of the WGA members, consultation of other expert CERN staff for highly specialized titles, and by criteria such as subscription price, impact factor, and - where available - access statistics for electronic journals. The list also accounts for the fact that many titles are subscribed to in 'packages' such that a cancellation of individual titles would not lead to any cost savings. We invite users to carefully check the list on the Library homepage (http://library.cern.ch/). If you find any title that you consider critically important for y...

  18. Patterns of Citing Korean DOI Journals According to CrossRef's Cited-by Linking and a Local Journal Citation Database

    Directory of Open Access Journals (Sweden)

    Tae-Sul Seo

    2013-06-01

    Full Text Available Citing literature is a very important activity for scholars in writing articles. Many publishers and libraries build citation databases and provide citation reports on scholarly journals. Cited-by linking is a service representing what an article cites and how many times it cites a specific article within a journal database. Recently, information services based on DOIs (Digital Object Identifiers have been increasing in number. CrossRef, a non-profit organization for the DOI registration agency, maintains the DOI system and provides the cited-by linking service. Recently, the number of Korean journals adopting DOI is also rapidly increasing. The Korea Institute of Science and Technology Information (KISTI supports Korean learned societies in DOI related activities in collaboration with CrossRef. This study analyzes cited patterns of Korean DOI journal articles using CrossRef's cited-by linking data and a Korean journal citation database. This analysis has been performed in terms of publication country and the language of journals citing Korean journal articles. The results show that DOI, SCI(E (Science Citation Index (Expanded, and English journals are more likely to be cited internationally.

  19. CytoJournal joins 'open access' philosophy

    Directory of Open Access Journals (Sweden)

    Shidham Vinod B

    2004-07-01

    Full Text Available Abstract Welcome to CytoJournal! We would like to introduce you to your journal, one that is run by and for the scientific cytopathology community with incontestable benefits of Open Access, and support from Cytopathology Foundation, Inc. http://www.cytopathology-foundation.org/index.htmlCytoJournal is a peer-reviewed, PubMed indexed, online journal, publishing research in the field of cytopathology and related areas, with world wide free access. Authors submitting to CytoJournal retain the copyright to their hard earned work.

  20. Making room for pluralism by redefining journalism

    DEFF Research Database (Denmark)

    Meyer, Gitte; Lund, Anker Brink

    2006-01-01

    Motivated by the ideal of pluralism, this essay explores an apparent paradox: although many different kinds of journalism may have evolved, because journalism is only vaguely defined by connections to ‘the media' and ‘news', there is a trend towards increasing journalistic standardization....... It is proposed that this standardization represents attempts to rationalize journalism. But rationalism is a framework of thought which is alien to journalism and to political life in general, it is argued. As an alternative framework for the philosophy and practice of journalism, the classical notions of praxis...

  1. Modeling nonuniversal citation distributions: the role of scientific journals

    CERN Document Server

    Yao, Zheng; Zhang, Li-Jie; Xu, Xin-Jian

    2013-01-01

    Whether a scientific paper to be cited is related not only to the influence of its author(s) but also to the journal publishing it. Scientists, either proficient or tender, usually submit their most important work to prestigious journals which receives high citations than the ordinary. Thus, scientific journals play a crucial role in citation networks. In this paper, we address this issue and develop a model for citations networks via an intrinsic nodal weight function and an intuitive ageing mechanism. In the network, each node is endowed with a weight which represents its quality determined by the journal publishing it. All the nodes have two discrete stages: active and inactive. The evolution of the network combines the addition of new active nodes randomly connected to existing active ones and the transition of old active nodes to the inactive. The node-degree distribution of resulting networks shows a nonuniversal scaling: the distribution has exponential behaviour for small degree and a power-law tail f...

  2. Moon Journals: Inquiry into Nature, Art, Literature, and Self.

    Science.gov (United States)

    Glasgow, Jackie

    1999-01-01

    Shares the results of a yearlong project of staff development where teachers kept a personal inquiry journal and participated in group activities. Finds the teachers grew together as a cohesive staff in learning to appreciate the inquiry process, to value the interests of their colleagues, to develop meaningful curriculum, and to enjoy the beauty…

  3. Are claims made in orthodontic journal advertisements evidence-supported?

    NARCIS (Netherlands)

    Livas, Christos; Kouskoura, Thaleia; Ren, Yijin; Katsaros, Christos; Pandis, Nikolaos

    2015-01-01

    Objective: To examine the supporting evidence of advertisements published in six leading orthodontic journals. Materials and Methods: The 2012-2013 printed issues of American Journal of Orthodontics and Dentofacial Orthopedics, Australian Orthodontic Journal, Journal of Orthodontics, European Journa

  4. Women's Involvement in Educational Psychology Journals from 1976 to 2004

    Science.gov (United States)

    Evans, Joy; Hsieh, Peggy Pei-Hsuan; Robinson, Daniel H.

    2005-01-01

    Previously, Robinson, McKay, Katayama, and Fan (1998) examined women's involvement in six educational psychology journals ("American Educational Research Journal," "Contemporary Educational Psychology," "Educational Psychologist," "Educational Psychology Review," "Journal of Experimental Education," and "Journal of Educational Psychology") from…

  5. MAKING SENSE OF AUTONOMY IN INFORMATION ONLINE JOURNALISM IN CHIAPAS

    Directory of Open Access Journals (Sweden)

    Luis Fernando Bolaños Gordillo

    2011-09-01

    Full Text Available Censorship prevalent historically in the practice of journalism in Chiapas, several organizations have taken over the use of new information technologies to inform and comment on the events in Chiapas, including his own, thus creating an autonomous way of exercising this important activity.This article is the product of research done in 2010, which analyzed the influence of the EZLN in the development of a regional sense in the online journalism in Chiapas as well as the presence that gradually increases in several pages, blogs and social networks.

  6. Exploring overlay journals: the RIOJA project

    CERN Document Server

    CERN. Geneva

    2007-01-01

    Researchers in cosmology and astrophysics depend on the arXiv repository for the registration and dissemination of their work, as well as for current awareness, yet they continue to submit papers to journals for review. Could rapid quality certification be overlaid directly onto the arXiv repository? This presentation introduces the RIOJA (Repository Interface to Overlaid Journal Archives) project, on which a group of cosmology researchers from the UK is working with UCL Library Services and Cornell University. The project is creating a tool to support the overlay of journals onto repositories, and will demonstrate a cosmology journal overlaid on top of arXiv. RIOJA will also work with the cosmology community to explore the social and economic aspects of journal overlay in this discipline: what other value, besides the quality stamp, does journal publication typically add? What are the costs of the ideal overlay journal for this community, and how could those costs be recovered? Would researchers real...

  7. Perilous terra incognita--open-access journals.

    Science.gov (United States)

    Balon, Richard

    2014-04-01

    The author focuses on a new rapidly spreading practice of publication in open-access journals. The pros and cons of open-access journals are discussed. Publishing in these journals may be cost prohibitive for educators and junior faculty members. Some authors may be lured by the ease of publishing in open-access journals (and their, at times, inflated self-description, e.g., "international", "scientific"), and their possibly valuable contributions will escape the attention of Academic Psychiatry readership in the vast sea of open-access journals. The readership may be flooded with a large number of low-quality articles (maybe not even properly peer-reviewed) from open-access journals. It may take some time to sort out what is and what is not relevant and useful. Open-access publishing represents a problematic and controversial practice and may be associated with a conflict of interest for the editors and publishers of these journals.

  8. The Reading Response E-Journal: An Alternative Way to Engage Low-Achieving EFL Students

    Science.gov (United States)

    Lee, Hsiao-Chien

    2013-01-01

    The reading response journal has been valued as an effective tool for involving students in authentic reading and writing activities. As the internet has become an essential medium in today's English classroom, it is advisable to integrate both the web and the journal when approaching our EFL students. In order to motivate and engage my…

  9. Journal club: an opportunity to advance the art and science of home health practice.

    Science.gov (United States)

    Fowler, Susan B; Druist, Kim A; Dillon-Zwerdling, Lisa

    2011-01-01

    A journal club is more than a club. It is an opportunity for staff to gather, learn, share, brainstorm, challenge thinking and ways of doing business, and set future direction. These activities have the potential to advance the art and science of nursing and other disciplines. Developing and implementing a successful journal club requires planning, communication, facilitation, and evaluation.

  10. Collaboration among Social Work and Journalism Students and Faculty: An Instructional Model

    Science.gov (United States)

    Stone, Susan; Ekman, Eve; English, Dierdre; Fujimori, Sachi

    2008-01-01

    The authors describe an instructional model designed to promote interdisciplinary collaboration among students pursuing master's degrees in social work and journalism. This unique model involved active collaboration among social work and journalism graduate students and faculty to create a single-issue magazine focused on a diverse range of social…

  11. Emotional Disclosure through Journal Writing: Telehealth Intervention for Maternal Stress and Mother-Child Relationships

    Science.gov (United States)

    Whitney, Rondalyn V.; Smith, Gigi

    2015-01-01

    This study examines emotional disclosure through the activity of journaling as a means of coping with maternal stress associated with parenting a child with disruptive behaviors. Through a randomized control and pre-test post-test study design of an online journal writing intervention, change to maternal stress and quality of mother-child…

  12. Beyond WikiLeaks implications for the future of communications, journalism and society

    CERN Document Server

    Brevini, Benedetta; McCurdy, Patrick

    2013-01-01

    The 2010 release of US embassy diplomatic cables put WikiLeaks into the international spotlight. Revelations by the leaks sparked intense debate within international diplomacy, journalism and society. This book reflects on the implications of WikiLeaks across politics and media, and on the results of leak journalism and transparency activism.

  13. 77 FR 59013 - State Journal Register, Camera and Plate Department, Springfield, IL; Notice of Affirmative...

    Science.gov (United States)

    2012-09-25

    ... Register on August 9, 2012 (77 FR 47674). The workers' firm is engaged in activities related to the... Employment and Training Administration State Journal Register, Camera and Plate Department, Springfield, IL... workers of State Journal Register, Camera and Plate Department, Springfield, Illinois. The...

  14. Need of a journal club in every medical education setup

    Directory of Open Access Journals (Sweden)

    Harminder Singh

    2014-06-01

    Full Text Available The scenario of scientific inscription has changed a lot with every day a new journal takes birth and so more and more manuscripts are written or manufactured in eagerness of academic endorsement/promotion, but very few academicians are appraising journals. This is a reality that the medical fraternity has exceptionally little curiosity in journal indulgent may be due to lack of proper training in this regards and the journal club (JC is a reply to this need. Medical education workforce must develop the necessary skills to keep up with the vast amount of information available. The JC is an influential educational instrument and has played an active role in medical education for over a century. Even though, this tool has been included in the postgraduate program, there still remains a need of understanding the concept and importance of journals. This paper provides an inclusive appraisal about what a JC and how to acquire/establish it our departments. [Int J Basic Clin Pharmacol 2014; 3(3.000: 574-577

  15. INIS: Authority List for Journal Titles

    International Nuclear Information System (INIS)

    This is the nineteenth revision of the INIS: Authority List for Journal Titles (IAEA-INIS-11). It lists 10,797 journal titles which have contained articles within the scope of INIS. The purpose of this Authority List is to provide descriptive cataloguers with a standard abbreviation for journal titles and to assist users of INIS products with a tool for verifying the full title of a journal. A journal, or periodical, is generally published within a defined, fixed interval between issues, which usually has more than one issue a year, and which usually includes a mixture of articles, letters, summaries, etc. Within this definition, annuals such as Annual Review of Nuclear Science are included. Series titles as, for example the McGraw-Hill Series in Nuclear Engineering, are not included in this Authority. Entries: Each entry consists of: - the full journal title (highlighted); - the abbreviated title; - ISSN, if available; - CODEN, if available; - additional information related to the journal title. Arrangement: In Part I, the full journal titles are grouped by country or international organization name and ordered alphabetically, followed by the ISSN, the CODEN in square brackets if available, and then the abbreviated title. The abbreviated title is based on the rules of ISO 4: Documentation - International Code for the Abbreviation of Titles of Periodicals. The abbreviations of the words are taken from the ISDS List of Periodical Title Word Abbreviation. In Part II, the order of the citations is reversed: the abbreviated journal titles are arranged alphabetically, followed by country code. Then the full journal titles are followed by the country of publication, and if available, ISSN and CODEN. Additional Information: There is important information related to the journal titles which are fundamental for tracing the history of the title and the present status. They are listed below and are entered whenever applicable: - Ceased publication; - Superseded by

  16. On The Modelling Of Hybrid Aerostatic - Gas Journal Bearings

    DEFF Research Database (Denmark)

    Morosi, Stefano; Santos, Ilmar

    2011-01-01

    Gas journal bearing have been increasingly adopted in modern turbo-machinery applications, as they meet the demands of operation at higher rotational speeds, in clean environment and great efficiency. Due to the fact that gaseous lubricants, typically air, have much lower viscosity than more...... modeling for hybrid lubrication of a compressible fluid film journal bearing. Additional forces are generated by injecting pressurized air into the bearing gap through orifices located on the bearing walls. A modified form of the compressible Reynolds equation for active lubrication is derived. By solving...... this equation, stiffness and damping coefficients can be determined. A multibody dynamics model of a global system comprised of rotor and hybrid journal bearing is built in order to study the lateral dynamics of the system. Campbell diagrams and stability maps are presented, showing the main advantages...

  17. For 481 biomedical open access journals, articles are not searchable in the Directory of Open Access Journals nor in conventional biomedical databases

    DEFF Research Database (Denmark)

    Liljekvist, Mads Svane; Andresen, Kristoffer; Pommergaard, Hans-Christian;

    2015-01-01

    biomedical databases (MEDLINE, PubMed Central, EMBASE and SCOPUS) and DOAJ were gathered. Journals were included if they were (1) actively publishing, (2) full OA, (3) prospectively indexed in one or more database, and (4) of biomedical subject. Impact factor and journal language were also collected. DOAJ...... journals, 86.7% were listed in DOAJ. Combined, the conventional biomedical databases listed 75.0% of the journals; 18.7% in MEDLINE; 36.5% in PubMed Central; 51.5% in SCOPUS and 50.6% in EMBASE. Of the journals in DOAJ, 88.7% published in English and 20.6% had received impact factor for 2012 compared...

  18. Professional Perceptions and Reasons for Access to Journalism Studies. The Case of Journalism Students at Complutense University of Madrid

    Directory of Open Access Journals (Sweden)

    Miriam RODRÍGUEZ PALLARES

    2015-12-01

    Full Text Available In the academic year 2013-2014, the MediaCom UCM research group conducted a study among students in the first and fourth year of the Degree in Journalism at UCM with the pretention to know the reasons that they decided to pursue these studies, their perceptions of journalism and media influence. From a quantitative analysis model relatively vocational criteria among students are perceived; generally they believe that journalists are not very independent and that political and economic factors influence in the activity of the media sector, whose influence on policy choices and consumption is subject to debate. This article is part of an academic project, whose results are intended to work with universities to improve their teaching and training model of students according to their perception of journalism as a profession.

  19. New journal on biological frontiers

    Institute of Scientific and Technical Information of China (English)

    Weihua WU

    2010-01-01

    @@ Frontiers in Biology, an international peer-reviewed scientific journal to be published bi-monthly, is launched today. It is jointly published by Higher Education Press and Springer. The joumal provides a forum for a broad blend of peer-reviewed articles to promote rapid communication and exchanges among biologists around the world. The primary criterion for publication is new insights that are of broad interest to biologists, not just specialists, and the presentation of results must be appropriate to a wide audience of biologists.

  20. Redesigning journal club in residency

    Directory of Open Access Journals (Sweden)

    Al Achkar M

    2016-05-01

    Full Text Available Morhaf Al Achkar Department of Family Medicine, Indiana University, Indianapolis, IN, USA Abstract: The gap between production and implementation of knowledge is the main reason for the suboptimal quality of health care. To eliminate this gap and improve the quality of patient care, journal club (JC in graduate medical education provides an opportunity for learning the skills of evidence-based medicine. JC, however, continues to face many challenges mainly due to poorly defined goals, inadequate preparation, and lack of interest. This article presents an innovative model to prepare and present JC based on three pillars: dialogical learning through group discussion, mentored residents as peer teachers, and including JC as part of a structured curriculum to learn evidence-based medicine. This engaging model has the potential to transform JC from a moribund session that is daunting for residents into a lively discussion to redefine clinical practice using the most current evidence. Keywords: journal club, residents, peer teaching, evidence-based medicine, dialogical learning

  1. Impact factor trends for general medical journals: non-English-language journals are lagging behind

    DEFF Research Database (Denmark)

    Vinther, Siri; Rosenberg, Jacob

    2012-01-01

    The impact factor (IF) is a common citation metric used for evaluating and comparing scientific journals within a certain field. Previous studies have shown that IFs are increasing. However, rates may depend on journal publication language. The aim of this study was to determine IF values and tre...... and trends for general medical journals, comparing non-English-language with English-language journals.......The impact factor (IF) is a common citation metric used for evaluating and comparing scientific journals within a certain field. Previous studies have shown that IFs are increasing. However, rates may depend on journal publication language. The aim of this study was to determine IF values...

  2. A history of the Journal of Parasitology.

    Science.gov (United States)

    Esch, Gerald; Desser, Sherwin; Nickol, Brent

    2014-02-01

    The present issue is Number 1 of Volume 100, The Journal of Parasitology. All 6 numbers of this, our Centennial Volume, are dedicated to those in the past who have contributed in any manner to the Journal's success as a national and international broker for parasitology. Our essay on the history of the Journal is divided into 3 parts. The first extends from 1914 to 1932, i.e., 'the beginning', when Henry Baldwin Ward was Editor and owned the Journal. The 'middle years' continue from 1933, when Ward gave the Journal to the American Society of Parasitologists, to 1961. The 'current period' carries on from 1961 to the present, our Centennial year. Obviously, we cannot provide a great many specific details for each era, but we have made an effort to identify some of the events, issues, and people that have played a significant role in our Journal's history.

  3. Citation analysis of Journal of Documentation

    Directory of Open Access Journals (Sweden)

    Navneet Kaur

    2011-06-01

    Full Text Available Citation analysis of all the journal articles published in the Journal of Documentation from 1996-2010 is carried out. 487 articles are published in the journal during 15 years. Highest numbers (44 of articles are published in the year 2005. The journal contained 15587 citations from 1996-2010. Average number of citation per article is maximum in the year 2009. This study also covers the analyses of authorship patterns in citing article. In authorship pattern, single author citations are dominant than others and it is 201 (49%. This study also reveals that Journal of Documentation is the most preferred journal used by authors in their citation. The paper concludes that only 10 core periodicals can cover more than 2951 (16 % references.

  4. Journal of New Democratic Methods: An Introduction

    OpenAIRE

    Funge, John David

    2004-01-01

    This paper describes a new breed of academic journals that use statistical machine learning techniques to make them more democratic. In particular, not only can anyone submit an article, but anyone can also become a reviewer. Machine learning is used to decide which reviewers accurately represent the views of the journal's readers and thus deserve to have their opinions carry more weight. The paper concentrates on describing a specific experimental prototype of a democratic journal called the...

  5. Oil film pressure in hydrodynamic journal bearings

    OpenAIRE

    Valkonen, Antti

    2009-01-01

    Hydrodynamic journal bearings are critical power transmission components that are carrying increasingly high loads because of the increasing power density in various machines. Therefore, knowing the true operating conditions of hydrodynamic journal bearings is essential to machine design. Oil film pressure is one of the key operating parameters describing the operating conditions in hydrodynamic journal bearings. Measuring the oil film pressure in bearings has been a demanding task and theref...

  6. Statistical Trends in Family Medicine Journals

    OpenAIRE

    Kwon, Hae-Jin; Park, Yong-Gyu

    2012-01-01

    Background This study proposed a desirable direction for the future development of the Korean Journal of Family Medicine (KJFM) by comparing with the overseas SCI journals, Family Medicine (FM) and The Journal of Family Practice (JFP) based on the statistical viewpoints. Methods All of the original articles published in KJFM from January 1981 to June 2011, FM from January 1998 to June 2011, and JFP from January 1978 to June 2011, were reviewed and compared in terms of content, data size, rese...

  7. The Best in CytoJournal: 2005

    Directory of Open Access Journals (Sweden)

    Cohen Michael

    2006-01-01

    Full Text Available Abstract CytoJournal opened its doors in late 2004 and 2005 was the first full year of publication. In order to celebrate this event as well as recognize the contributing authors works, CytoJournal has initiated a Best Article of the Year, in this case 2005. This year's Best of CytoJournal: 2005 is an excellent review of thyroid FNAB.

  8. Chinese journals: a guide for epidemiologists

    OpenAIRE

    Fung Isaac CH

    2008-01-01

    Abstract Chinese journals in epidemiology, preventive medicine and public health contain much that is of potential international interest. However, few non-Chinese speakers are acquainted with this literature. This article therefore provides an overview of the contemporary scene in Chinese biomedical journal publication, Chinese bibliographic databases and Chinese journals in epidemiology, preventive medicine and public health. The challenge of switching to English as the medium of publicatio...

  9. Italian Journal of Animal Science - Presentation

    Directory of Open Access Journals (Sweden)

    Vincenzo Russo

    2010-01-01

    Full Text Available The publication of the first issue of the Italian Journal of Animal Science marks two important events for the Associazione Scientifica di Produzione Animale -ASPA- (Italian Scientific Association of Animal Production: the birth of a new scientific journal in English and the end of the publication in Italian of the remarkable journal Zootecnica e Nutrizione Animale, which was started in 1975, as the official organ of the Association.

  10. Italian Journal of Animal Science - Presentation

    OpenAIRE

    Vincenzo Russo

    2010-01-01

    The publication of the first issue of the Italian Journal of Animal Science marks two important events for the Associazione Scientifica di Produzione Animale -ASPA- (Italian Scientific Association of Animal Production): the birth of a new scientific journal in English and the end of the publication in Italian of the remarkable journal Zootecnica e Nutrizione Animale, which was started in 1975, as the official organ of the Association.

  11. Why a new journal on animal science

    Directory of Open Access Journals (Sweden)

    Rosanna Scipioni

    2010-01-01

    Full Text Available The publication of the first issue of the Italian Journal of Animal Science marks two important events for the Associazione Scientifica di Produzione Animale -ASPA- (Italian Scientific Association of Animal Production: the birth of a new scientific journal in English and the end of the publication in Italian of the remarkable journal Zootecnica e Nutrizione Animale, which was started in 1975, as the official organ of the Association.

  12. Why a new journal on animal science

    OpenAIRE

    Rosanna Scipioni

    2010-01-01

    The publication of the first issue of the Italian Journal of Animal Science marks two important events for the Associazione Scientifica di Produzione Animale -ASPA- (Italian Scientific Association of Animal Production): the birth of a new scientific journal in English and the end of the publication in Italian of the remarkable journal Zootecnica e Nutrizione Animale, which was started in 1975, as the official organ of the Association.

  13. THE CHALLENGES OF DEVELOPMENT JOURNALISM IN NIGERIA

    OpenAIRE

    FELIX OLAJIDE TALABI

    2013-01-01

    Development journalism is perceived as alternative journalism that primarily focuses on national development especially in the third world countries. This paper examines the reasons for dissociation from the advancement perspective of the developed world, the challenges faced by development journalism and discusses the way the nation should go to attain her desire in the committee of nations Library research was used to generate secondary data for this paper. The writing is anchored on the th...

  14. The Crop Journal Calls for Papers

    Institute of Scientific and Technical Information of China (English)

    2014-01-01

    <正>We would like to invite you to submit your latest research accomplishments to The Crop Journal(ISSN:2095-5421;Online ISSN:2214-5141,CN 10-1112/S),a new bimonthly academic journal co-sponsored by the Crop Science Society of China and the Institute of Crop Science,Chinese Academy of Agricultural Sciences.The Crop Journal is freely available online(Open Access)in ScienceDirect.The Editor-in-Chief of

  15. The Crop Journal Calls for Papers

    Institute of Scientific and Technical Information of China (English)

    2015-01-01

    <正>We would like to invite you to submit your latest research accomplishments to The Crop Journal(ISSN:2095-5421;Online ISSN:2214-5141,CN 10-1112/S),a new bimonthly academic journal co-sponsored by the Crop Science Society of China and the Institute of Crop Science,Chinese Academy of Agricultural Sciences.The Crop Journal is freely available online(Open Access)in ScienceDirect.The Editor-in-Chief

  16. The Crop Journal Calls for Papers

    Institute of Scientific and Technical Information of China (English)

    2014-01-01

    <正>We would like to invite you to submit your latest research accomplishments to The Crop Journal(ISSN:2095-5421;Online ISSN:2214-5141,CN 10-1112/S),a new bimonthly academic journal co-sponsored by the Crop Science Society of China and the Institute of Crop Science,Chinese Academy of Agricultural Sciences.The Crop Journal is freely available online(Open Access)in ScienceDirect.

  17. The Crop Journal Calls for Papers

    Institute of Scientific and Technical Information of China (English)

    2013-01-01

    <正>We would like to invite you to submit your latest research accomplishments to The Crop Journal(ISSN:2095-5421;Online ISSN:2214-5141,CN 10-1112/S),a new bimonthly academic journal co-sponsored by the Crop Science Society of China and the Institute of Crop Science,Chinese Academy of Agricultural Sciences.The Crop Journal is freely available online(Open Access)in ScienceDirect.

  18. Journal site as the tool of knowledge marketing

    Directory of Open Access Journals (Sweden)

    S.M. Illiashenko

    2014-03-01

    Full Text Available The aim of the article. World economy since 2005 has moved to descending wave of a long economic cycle and productions of technological order V (which currently dominates are gradually losing their relevance, and of the VI one are mainly at the stage of scientific research and development. In these conditions the production and application of new knowledge (scientific, technical, professional has a chance to enter the path of innovation growth in the mainstream of the innovation development concept. Promotion and popularization of scientific knowledge is provided by scientific journals, especially scientific periodical journals, which are the basis of technical and professional knowledge on the one hand, and generalize and systematize the available technical and vocational achievements on the other hand. Scientific and applied developments which are published there can be the basis for further research, they can also be implemented in practical activities of business structures, government, regional and local government. Website in the Internet is an effective and instantaneous tool for expanding the audience of the scientific journal, which allows enter the foreign countries, with minimal cost and still provide the individualization of communication with readers. It is not only the tool to promote scientific knowledge of certain subjects, but it can also be used to gather information about its target audience. The aim of this study is to analyze the efficiency of the site scientific journal as a marketing tool in the sphere of Internet knowledge and to give recommendations for improving the system of scientific knowledge advancing. The results of the analysis. The website of journal «Marketing and Management of Innovations» was chosen as the object of research, which is published by the Department of Marketing and MIA of Sumy State University (Ukraine. The tools of Google Analytics were used for analysis. Magazine website accessed in most

  19. Heuristic explanation of journal bearing instability

    Science.gov (United States)

    Crandall, S. H.

    1982-01-01

    A fluid-filled journal bearing is viewed as a powerful pump circulating fluid around the annular space between the journal and the bearing. A small whirling motion of the journal generates a wave of thickness variation progressing around the channel. The hypothesis that the fluid flow drives the whirl whenever the mean of the pumped fluid velocity is greater than the peripheral speed of the thickness variation wave is discussed and compared with other simple explanations of journal bearing instability. It is shown that for non-cavitation long bearings the hypothesis predicts instability onset correctly for unloaded bearings but gradually overpredicts the onset speed as the load is increased.

  20. Welcome to the Journal of Daylighting

    OpenAIRE

    Irfan Ullah

    2014-01-01

    I am delighted to welcome you to a newly launched Solarlits electronic journal: the Journal of Daylighting (JD). As the Editor-in-Chief of JD it is a great pleasure to introduce the inaugural issue of this new, open-access, bi-annual journal to readers, researchers, future authors, and colleagues. The decision by SolarLits to launch this new journal is very timely. Because the growth of lighting demand is increasing due to rising average illuminance levels in buildings, more attention has bee...

  1. INIS: Authority list for journal titles

    International Nuclear Information System (INIS)

    This is the twenty-ninth revision of the INIS: Authority List for Journal Titles (IAEA-INIS-11). It lists the titles of 12 990 journals which have contained articles within the scope of INIS. The purpose of this report is to provide descriptive cataloguers with a standard entry for the full title of a journal. In addition to the full journal title, the ISSN (International Standard Serial Number), administered by the ISSN International Centre, Paris, France, and/or CODEN, assigned by Chemical Abstracts Service, USA, are given in this manual. In order to help the reader to find titles easily, the list is divided into two parts. In Part I, the full journal titles are grouped by country or international organization responsible for coverage and ordered alphabetically. In Part II, the full journal titles of all countries or international organizations are arranged alphabetically. The country name or the international organization name responsible for coverage of the journal title to INIS is entered in parentheses. Journal titles marked with an asterisk are regularly scanned by INIS. Titles that have been identified by INIS Centres as 'Key Journals' are marked with the hash sign

  2. The international impact of scientific journals - how "international" are the international journals?

    DEFF Research Database (Denmark)

    Wormell, Irene

    the analysis of the geographical distribution of authors, citations and subscriptions for seven selected LIS journals......the analysis of the geographical distribution of authors, citations and subscriptions for seven selected LIS journals...

  3. On The Modeling Of Hybrid Aerostatic - Gas Journal Bearings

    DEFF Research Database (Denmark)

    Morosi, Stefano; Santos, Ilmar

    2010-01-01

    Gas journal bearing have been increasingly adopted in modern turbo-machinery applications, as they meet the demands of operation at higher rotational speeds, in clean environment and great efficiency. Due to the fact that gaseous lubricants, typically air, have much lower viscosity than more...... of a compressible fluid film journal bearing. Control forces are generated by injecting pressurized air into the bearing gap through orifices located on the bearing walls. A modified form of the compressible Reynolds equation for active lubrication is derived. By solving this equation, stiffness and damping...... conventional oil bearings, carrying capacity and dynamic characteristics of passive systems are generally poorer. In order to enhance these characteristics, one solution is to employ active control strategies. The present contribution presents a detailed mathematical modeling for active lubrication...

  4. Redesigning journal club in residency.

    Science.gov (United States)

    Al Achkar, Morhaf

    2016-01-01

    The gap between production and implementation of knowledge is the main reason for the suboptimal quality of health care. To eliminate this gap and improve the quality of patient care, journal club (JC) in graduate medical education provides an opportunity for learning the skills of evidence-based medicine. JC, however, continues to face many challenges mainly due to poorly defined goals, inadequate preparation, and lack of interest. This article presents an innovative model to prepare and present JC based on three pillars: dialogical learning through group discussion, mentored residents as peer teachers, and including JC as part of a structured curriculum to learn evidence-based medicine. This engaging model has the potential to transform JC from a moribund session that is daunting for residents into a lively discussion to redefine clinical practice using the most current evidence. PMID:27313486

  5. Investigation of SCI Journal Selection Process for the Journals of Korean Traditional Medicine

    OpenAIRE

    Hyundo Kim; Taesik Kang; Ki-Rok Kwon

    2003-01-01

    The purpose of this study is to investigate and analyze the selection process of the Science Citation Index(SCI). SCI has been the benchmarking medium of scientific journals for over 40 years by reviewing thousands of journals published each year. The discipline of Traditional Oriental Medicine has been gaining global interest in recent years, yet the number of related journals indexed by SCI has been minimal. Korean Medicine has been producing number of quality journals for decades, but lack...

  6. Hypothetical influence of non-indexed Spanish journals on the impact factor of radiological journals

    Energy Technology Data Exchange (ETDEWEB)

    Miguel-Dasit, Alberto [MR Section, La Plana de Vila-Real Hospital, Castellon (Spain); Aleixandre, Rafael [Institute of History of Science and Documentation Lopez Pinero, University of Valencia-CSIC, Valencia (Spain); Valderrama, Juan C. [Institute of History of Science and Documentation Lopez Pinero, University of Valencia-CSIC, Valencia (Spain); Marti-Bonmati, Luis [Department of Radiology, MR Section, Dr. Peset University Hospital, Avenida Gaspar Aguilar 90, E-46017 Valencia (Spain)]. E-mail: marti_lui@gva.es; Sanfeliu, Pilar [Cardenal Herrera-CEU University, Alfara, Valencia (Spain)

    2005-06-01

    Objective: The aim of this study was to analyze the hypothetical changes in the 2001 impact factor of 52 radiological journals included in the Science Citation Index-Journal Citation Reports by also counting cites proceeding from 73 Spanish journals on different medical specialties. Also, to estimate the possible impact factor of the official Spanish radiology journal, Radiologia, not included in this database. Materials and methods: A modified 2001 impact factor of 52 radiological journals and Radiologia was obtained by adding the number of cites in 1999 and 2000 from the medical Spanish journals. Data were obtained by consulting the 2001 edition of the Journal Citation Reports in the 'Web of Science' database. Results: The 16,985 bibliographical references were analysed (232 of them to radiological journals). The journal with the largest increase in its 2001 impact factor (from 1.83 to 1.90) was Radiologic Clinics of North America. European Journal of Radiology was the European journal with the highest increase (from 1.084 to 1.110) in the difference between the 2001 modified and original impact factor. The modified 2001 impact factor of the 34 American journals was statistically higher (P = 0.016) than that of the 18 European journals (1.64 versus 0.93). Differences between the 2001 modified and original impact factor were slightly higher in the American journals (no statistically significant difference). The 2001 impact factor of Radiologia was 0.056. Discussion: Differences between the 2001 original and modified impact factor were small, but larger in the American journals. The 2001 impact factor of Radiologia was modest, although similar to other publications included in the Journal Citation Reports.

  7. Is journalism failing on climate?

    Science.gov (United States)

    Rahmstorf, Stefan

    2012-12-01

    How can we build a reliable and affordable energy supply based on renewables? How rapidly do we need to cut greenhouse gas emissions to keep climate change within manageable bounds? What does it take to maintain a stable common currency of different nations? These are just a few examples of questions that are critical for our future and that require an understanding of complex systems—the energy system, the climate system, the financial system. Finding sound answers to these questions requires sophisticated scientific analysis and expert knowledge; a lay person's intuition will clearly not suffice. Yet, decisions in a democracy are (and should be!) taken by politicians and the voting public who are not usually scientific experts. Hence the well-being of our societies—and even more so the living conditions of future generations, which are defined by the decisions we take today—depends on the wider public being well informed about the state of scientific knowledge and discourse. The media are the most important means by which lay people obtain their information about science. Good science journalism is therefore a decisive factor for the long-term success of modern society. Good science journalism clearly must be critical journalism, and it requires journalists who know what is what, who can put things into a perspective, and who are able to make well-informed judgements. After all, the role of science journalism is not simply to act as a 'translator' who conveys the findings of scientists in a language understandable to lay people. Rather, good science journalism will provide the public with a realistic impression of what is well established in science and what are current 'hot topics', uncertainties and controversies. It will also discuss the methods and social context of the scientific endeavour. There is ample evidence that in the area of climate science, journalism too often is failing to deliver this realistic picture to its audience, despite many good

  8. A Modest Proposal: One Way to Save Journalism and Journalism Education

    Science.gov (United States)

    John, Jeffrey Alan

    2013-01-01

    This essay suggests that because anyone and everyone can now be a "journalist," the standards of the field of journalism have been greatly diminished. To regain respect for the profession and retain stature in the academy, journalism education should offer an assurance of the legitimacy of journalism program graduates by recognizing only…

  9. Journal of the Malta College of Family Doctors : volume 2 : issue 2

    OpenAIRE

    Malta College of Family Doctors; Mallia, Pierre; Agius, Dominic

    2013-01-01

    Contents: Editorial - Pierre Mallia; Bridget Ellul; First Hon. FMCFD and MMCFD Graduation ceremony 10th May 2013; Education, the Fellowship, international activities, the statute and the Journal - Pierre Mallia; Works in progress - Jason J. Bonnici

  10. New journal: Journal of Problem Based Learning in Higher

    Directory of Open Access Journals (Sweden)

    Thomas Ryberg

    2012-07-01

    Full Text Available Kære kolleger Hermed en kort notits om, at der netop er blevet lanceret en ny international open access journal, som har stærke rødder i dansk uddannelsestradition og forskning og dermed også skulle have bred interesse for flere danske forsknings- og uddannelsesmiljøer. Tidsskriftet hedder ’Journal of Problem Based Learning in Higher Education’ og er således specielt dedikeret til forskningsartikler, der vedrører de lange og mellemlange videregående uddannelser. Tidsskriftets fokus er Problem Based Learning, eller det, der i en dansk kontekst, kendes bedre som problemorienteret projektarbejde/projektpædagogik. Begrebet Problem Based Learning/Problembaseret Læring kan dog også forstås bredere som en mere studenter-centreret pædagogik, hvor der i forbindelse med kurser tages udgangspunkt i og arbejdes med problemer som udgangspunkt for læring; hvor der arbejdes med cases, eller hvor de studerende aktiveres gennem f.eks. projektforløb. De mere specifikke fokus- og interesseområder kan man dog læse mere om i den vedhæftede flyer, som alle er velkomne til at cirkulere til evt. interesserede kolleger. Særlig interessant for læsere og forfattere i LOM er naturligvis, at redaktionen er interesserede i artikler, der involverer brugen af IKT og medier i forbindelse med Problembaseret Læring og problemorienteret projektarbejde. Vi forestiller os, at artikler udgivet i LOM, der omhandler dette, med fordel kunne viderebearbejdes til et internationalt publikum. Man kan læse mere, om tidskriftet, fokus og guidelines på adressen: http://ojs.statsbiblioteket.dk/index.php/pbl Vi håber at mange af LOMs læsere og forfatter også vil være interesseret i dette nye tidsskrift, og hvis nogle skulle have spørgsmål eller kommentarer er de velkomne til at kontakte: Thomas Ryberg (ryberg@hum.aau.dk

  11. Participation of women as authors and editors in journals concerned with mental retardation and related topics.

    Science.gov (United States)

    Porter, Cari L; Christian, LeeAnn; Poling, Alan

    2003-02-01

    The present survey determined women's participation in eight journals concerned with mental retardation and related topics. The number of female authors was recorded for all articles published in these journals from 1991 through 2000. The number of women on the editorial board each year, for each journal, also was tabulated. For all years and all journals, women were first authors of 41% of articles published. Women wrote 34% of single-author articles. Overall, 45% of all authors were women. Women constituted 34% of the editorial board members for the eight journals combined. In sum, these data suggest that women's contribution to the mental retardation literature decreases with the prestige of the activity. PMID:12597719

  12. Australian Education Journals: Quantitative and Qualitative Indicators

    Science.gov (United States)

    Haddow, Gaby; Genoni, Paul

    2009-01-01

    This paper reports on a study that applied citation-based measurements to Australian education journals. Citations data were drawn from two sources, Web of Science and Scopus, and these data were used to calculate each journal's impact factor, "h"-index, and diffusion factor. The rankings resulting from these analyses were compared with draft…

  13. Broadcast Journalism Education and the Capstone Experience

    Science.gov (United States)

    Tanner, Andrea; Forde, Kathy Roberts; Besley, John C.; Weir, Tom

    2012-01-01

    This study assesses the current state of the television news capstone experience in accredited journalism and mass communication programs in the United States. Specifically, the authors employed a mixed-methods approach, interviewing 20 television news capstone instructors and conducting an analysis of broadcast journalism curriculum information…

  14. Student-Selected Journals: An Emerging Resource

    Science.gov (United States)

    Weber, Roberta K.; Allen, Ethan J.

    2014-01-01

    This longitudinal study investigates the journal selections of 367 graduate students as they worked to fulfill a commonly assigned, criteria-based literature search on educational topics. The criteria called for evidence-based studies, published within the current ten years of course enrollment, within peer-reviewed journals. Student references…

  15. Professional Academic Development through Professional Journal Dialogue

    Science.gov (United States)

    Ruth, Damian; Naidoo, Kogi

    2012-01-01

    This paper presents the cooperative analysis by a lecturer and an academic development practitioner of a reflective journal dialogue over the 12 weeks of teaching a postgraduate course. Through a retrospective analysis of the journal the present paper explores the following issues: the framing of an inquiry; the personal-professional nexus; and…

  16. Northeastern Mathematical Journal Aims and Scope

    Institute of Scientific and Technical Information of China (English)

    2005-01-01

    Northeastern Mathematical Journal (NMJ) is a comprehensive mathematical journal carrying original papers on pure and applied mathematics. It started publication in September, 1985, and appears quarterly. The primary purpose is to present latest achievements in mathematical research and to promote national and international academic exchange, The Editorial Committee of NMJ consists of 49 members from different parts and units of China.

  17. Northeastern Mathematical Journal Aims and Scope

    Institute of Scientific and Technical Information of China (English)

    2004-01-01

    Northeastern Mathematical Journal (NMJ) is a comprehensive mathematical journal carrying original papers on pure and applied mathematics. It started publication in September, 1985, and appears quarterly. The primary purpose is to present latest achievements in mathematical research and to promote national and international academic exchange.

  18. A Comprehensive Analysis of Marketing Journal Rankings

    Science.gov (United States)

    Steward, Michelle D.; Lewis, Bruce R.

    2010-01-01

    The purpose of this study is to offer a comprehensive assessment of journal standings in Marketing from two perspectives. The discipline perspective of rankings is obtained from a collection of published journal ranking studies during the past 15 years. The studies in the published ranking stream are assessed for reliability by examining internal…

  19. Patterns of Use of Electronic Journals.

    Science.gov (United States)

    Eason, Ken; Richardson, Sue; Yu, Liangzhi

    2000-01-01

    Classifies a spectrum of user behavior with electronic journals based on transaction log analysis of SuperJournal and K-Means cluster analysis. Describes results of user interviews and questionnaires from 13 United Kingdom higher education institutions that showed content and ease of use were the most significant factors affecting patterns of use.…

  20. Journalism – neo-modern and deliberative

    DEFF Research Database (Denmark)

    Svith, Flemming

    journalism and society and democracy still exists. Paraphrasing scholarly work, the idea of this paper is simple: I propose a new journalistic approach, called Analytical Journalism, which adds to representations of reality in news discourse by nuancing dominating frames on a specific issue. Hence, the story...

  1. Bibliometrics of electronic journals in information science

    Directory of Open Access Journals (Sweden)

    Donald T. Hawkins

    2001-01-01

    Full Text Available The bibliometric characteristics of electronic journals (e-journals covering the field of information science have been studied. Twenty-eight e-journals were identified and ranked by number of articles on the subject they published. A Bradford plot revealed that the core is not well developed yet, but it will likely contain six journals. The publication of information science articles in e-journals began modestly in 1995 with 26 articles, but it has risen to approximately 250 articles per year. The most prolific authors are identified. The vast majority of them are located in the United States or United Kingdom. Only 26 articles have authors from more than one country, showing that electronic technology has not yet strongly influenced international collaboration. About 2/3 of the articles originate in academic institutions. Common topics of e-journal articles in information science include electronic information, electronic publishing, virtual (digital libraries, information search and retrieval, and use of the Internet. Seven online databases cover these e-journals; Information Science Abstracts is the only one to cover all 28 journals, and it has the highest number of abstracts from them - over 1,100.

  2. Accuracy of References in Five Entomology Journals.

    Science.gov (United States)

    Kristof, Cynthia

    ln this paper, the bibliographical references in five core entomology journals are examined for citation accuracy in order to determine if the error rates are similar. Every reference printed in each journal's first issue of 1992 was examined, and these were compared to the original (cited) publications, if possible, in order to determine the…

  3. Journalling and the Teaching of Spirituality.

    Science.gov (United States)

    Bush, Tony

    1999-01-01

    A teacher developing a method to teach spiritual care to nursing students over age 25 used a journal to record and reflect on experiences. The importance of a safe and open learning environment, use of adult-learning principles, and immediate recording of journal entries was underscored. (SK)

  4. Citing Journal Articles in Social Sciences Blogs

    Directory of Open Access Journals (Sweden)

    Hamid Reza Jamali

    2015-05-01

    Full Text Available This article aims to analyze motivations behind social sciences blog posts citing journal articles in order to find out whether blog citations of scholarly journal articles are good indicators for the societal impact of research. A random sample of 300 social sciences blog posts (out of 1,233 blog posts from ResearchBlogging published between 01/01/2012 to 18/06/2014 were subjected to content analysis. An existing categorization scheme was used and modified inductively. The 300 blog posts had 472 references including 424 journal articles from 269 different journals. Sixty-one (22.68% of all journals cited were from the category of social sciences and most of the journals with high frequency were highly cited general science journals such as PNAS and Science. Seventy-five percent of all journals were referenced only once. The average age of articles cited was 5.8 years. The most frequent (38, 12.67% motivation was to ‘neutrally presenting details of a study’. Overall, social science blogs were rather subject-oriented than article oriented. This means a considerable number of blog posts were not driven simply by writing about an article, instead bloggers tend to write about their subject of interest and use references to support their argument. The study shows the potential of blog citations as an altmetric measure and as a proxy for assessing the research impact.

  5. Electrochemical Journals, AIP's Scitation, Cost-Effectiveness

    OpenAIRE

    Roth, Dana L.

    2004-01-01

    A review of the relative subscription costs, page & article counts of Electrochemical Society journals compared with commercial counterparts. A description of the AIP's Scitation database. The relative cost-effectiveness (normalized cost/article/Impact Factor) of society and commercial journals related to electrochemistry.

  6. Academic Journal Embargoes and Full Text Databases.

    Science.gov (United States)

    Brooks, Sam

    2003-01-01

    Documents the reasons for embargoes of academic journals in full text databases (i.e., publisher-imposed delays on the availability of full text content) and provides insight regarding common misconceptions. Tables present data on selected journals covering a cross-section of subjects and publishers and comparing two full text business databases.…

  7. Making the Introductory Journalism Class Tick.

    Science.gov (United States)

    Dorway, Tim

    2003-01-01

    Proposes that beginning journalism classes teach multiple skills, including law, decision-making, interpersonal communication, interviewing, and critical thinking. Outlines how to convince administrators of the need for beginning journalism classes, and how to develop an effective class. Lists philosophy and course goals for one such class. (PM)

  8. Using Dialogue Journals to Focus on Form

    Science.gov (United States)

    Linnell, Kimberly Miller

    2010-01-01

    Dialogue journals have been used in a wide range of educational settings for quite some time. These written conversations between teachers and students are especially well suited for the ESL classroom. This article describes how many of the conditions known to foster second language acquisition are inherent in the dialogue journal. Traditionally,…

  9. Surviving the War: A College Counselor's Journal

    Science.gov (United States)

    Clinton, Philip L.

    2012-01-01

    This article presents excerpts of the author's journal that recounts his experiences and the events about surviving the war in Egypt from 1990-1991. The article begins with the August 13th entry in the journal of the year 1990.

  10. Thematic review of family therapy journals 2011

    OpenAIRE

    Carr, Alan.

    2012-01-01

    In this article the contents of the principal English-language family therapy journals published in 2011 are reviewed under these headings: child-focused problems, adult-focused problems, couples therapy, medical family therapy, military family therapy, theory, research, training, the new Journal of Couple and Family Psychology and Human Systems twenty-first anniversary. peer-reviewed

  11. Job Satisfaction of High School Journalism Educators.

    Science.gov (United States)

    Dvorak, Jack; Phillips, Kay D.

    Four research questions are posed to explore the job satisfaction of high school journalism educators. A national random sample of 669 respondents shows that journalism educators are generally satisfied with their jobs--more so than teachers in other disciplines. Multiple regression analysis using Herzberg's motivation-hygiene theory as a…

  12. A Registry of Archived Electronic Journals

    Science.gov (United States)

    Sparks, Sue; Look, Hugh; Bide, Mark; Muir, Adrienne

    2010-01-01

    Concerns about e-journal archiving have increased in recent years. There is no central list of archived titles and there are inconsistencies in the information available about them. This makes it difficult for journal collection managers to take decisions on discarding print back runs and moving to electronic only subscriptions. In 2007, the UK's…

  13. Electronic Journals, the Internet, and Scholarly Communication.

    Science.gov (United States)

    Kling, Rob; Callahan, Ewa

    2003-01-01

    Examines the role of the Internet in supporting scholarly communication via electronic journals. Topics include scholarly electronic communication; a typology of electronic journals; models of electronic documents and scholarly communication forums; publication speed; costs; pricing; access and searching; citations; interactivity; archiving and…

  14. Kiyo Journals and Scholarly Communication in Japan

    Science.gov (United States)

    Kamada, Hitoshi

    2007-01-01

    Kiyo are journals published by Japanese academic institutions. As a scholarly communication medium, they have inherent problems such as limited accessibility and lack of quality control. Despite these problems, they have evolved to comprise the majority of academic journals published in the humanities and social sciences in Japan because they fit…

  15. Congratulation on World Journal of Gastroenterology

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    @@ Dear Professor Lian-Sheng Ma, Professor Michael Hobsley and I have greatly enjoyed reading the account of all you have done towards the development of "The World Journal of Gastroenterology", as described in the article by Zhen-Xi Li in the November 21st. Issue of the Journal.

  16. Electronic Journal Delivery in Academic Libraries

    Science.gov (United States)

    Crothers, Stephen; Prabhu, Margaret; Sullivan, Shirley

    2007-01-01

    The authors recount experiences of the variety of problems and issues involved in providing access to electronic journals in a large academic library. The paper excludes concerns emanating from decisions to subscribe to aggregations such as those produced by vendors like EBSCO, but concentrates on scholarly journals ordered individually, or as…

  17. Educational Technology Research Journals: "Instructional Science,"

    Science.gov (United States)

    Henrie, Curtis R.; Williams, Greg S.; West, Richard E.

    2013-01-01

    The authors analyzed all research articles published between 2002 and 2011 in the international journal "Instructional Science," with a goal to provide an understanding of the type of research being published in this journal, major contributing authors, and the most-cited publications of this time period. They examined research…

  18. The Academic Journal: Has it a Future?

    Directory of Open Access Journals (Sweden)

    Gaby Weiner

    2001-03-01

    Full Text Available This article examines the current state of the academic journal. It does so for a number of reasons: the increasing expense of paper journals; the advent of electronic publishing; the use of publication in journals as an indicator of research quality (in addition to disseminating knowledge within a discipline and consequent criticisms of systems of peer review and evaluation of scholarship; emergent issues of equity and access; and evidence of malpractice. These issues taken together constitute a critique of, and challenge to, the process whereby research papers become journal articles, which has in the past been viewed as unproblematic and straightforward. This paper brings together a wide range of literature in order to inform discussion about the future of the academic journal. It briefly examines the origins of the academic journal and then provides a comprehensive overview of current debates concerning how academic journals work today. In so doing, it raises questions about decisions that will need to be taken regarding the continuity or otherwise of the conventional academic journal, and how publishing practices may change in the future.

  19. DPJ Editorial: Launching the new journal

    Directory of Open Access Journals (Sweden)

    Eugene Matusov

    2013-01-01

    Full Text Available We welcome and invite new readers, authors, reviewers and editors to the new journal.  A short history of the journal foundation is given along with the reasons for launching this publication. A long, but not finished, list is provided of important and interesting themes and areas of interest for dialogic educational practice, research and theory.

  20. Foreword to Journal of Geographical Sciences

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    @@In order to strengthen academic exchange of geography between China and other countries,and to offer a publication for exchanging academic ideas of geog-raphers in the world,The Journal of AChinese Geog-raphyis changed to Journal of Geographical Sciences in 2001.

  1. Journalism: Acquiring Something to Write About.

    Science.gov (United States)

    Moore, Roy L.

    1989-01-01

    A broad liberal arts curriculum coupled with basic and advanced journalism writing, editing, and theory (including law and ethics) courses is the best insurance for excellence in journalism education. A University of Kentucky plan includes establishing an exchange program with other disciplines, and requiring paired, cross-disciplinary courses.…

  2. Responsibility: The Key to Scholastic Journalism.

    Science.gov (United States)

    Bowen, John

    1988-01-01

    To behave responsibly toward school journalism, personnel officers and administrators must select a qualified, fully cognizant adviser/instructor with training in press law and ethics, journalism advising and instruction, news reporting, copy editing, and design and layout principles. A professionally oriented curriculum is also a must. (MLH)

  3. Physical Review: a family of journals

    Science.gov (United States)

    Sprouse, Gene

    2013-03-01

    The expansion of research in physics in the last 100 years has been reflected in the expansion of the Physical Review(PR). Reviews of Modern Physics was the first ``new'' journal, starting in 1929. Physical Review Letters commenced in 1958, and was the first ``letters'' type of journal for important new results in all fields. By 1970 the Physical Review itself had grown so large that it was necessary to separate it by field into manageable volumes: PRA, PRB, PRC and PRD, and subsequently PRE, which was split off from PRA. More recently, two Special Topics journals for accelerator physics and physics education were pioneers of the open access business model, and the newest member of the family, Physical Review X, continues this trend. PRX is broad scope and very selective, setting it well above many of the new open access journals with a review standard of ``not incorrect.'' Some possible future directions for the Physical Review journals will be discussed.

  4. Measuring contextual citation impact of scientific journals

    CERN Document Server

    Moed, Henk F

    2009-01-01

    This paper explores a new indicator of journal citation impact, denoted as source normalized impact per paper (SNIP). It measures a journal's contextual citation impact, taking into account characteristics of its properly defined subject field, especially the frequency at which authors cite other papers in their reference lists, the rapidity of maturing of citation impact, and the extent to which a database used for the assessment covers the field's literature. It further develops Eugene Garfield's notions of a field's 'citation potential' defined as the average length of references lists in a field and determining the probability of being cited, and the need in fair performance assessments to correct for differences between subject fields. A journal's subject field is defined as the set of papers citing that journal. SNIP is defined as the ratio of the journal's citation count per paper and the citation potential in its subject field. It aims to allow direct comparison of sources in different subject fields....

  5. The Many Crises of Western Journalism

    DEFF Research Database (Denmark)

    Nielsen, Rasmus Kleis

    The digital-cum-economic crisis facing Western journalism differs in subtle but significant ways from country to country, and fierce struggles play out between different parties over how to interpret the situation and how to confront it. This chapter presents a comparative analysis of how...... journalists, media executives, and media policymakers in six different Western democracies (Finland, France, Germany, Italy, the UK, and the US) employ three distinctive frameworks to interpret the state of professional journalism in their country. The first is an economic frame that defines the crisis...... for journalists, media executives, and media policymakers. The economic question is “Will journalism survive?” The professional question is “What is journalism?” The symbolic question is “What is the status of journalism in society?” On the basis of almost one hundred interviews, as well as secondary sources from...

  6. MARKET CONCENTRATION IN TURKISH JOURNALISM SECTOR

    Directory of Open Access Journals (Sweden)

    ADEM KALÇA

    2013-05-01

    Full Text Available Concentration is a situation in which market structure of a sector is controlled by a few firms. At the present time, many analyzing methods such as Herfindahl-Hirschman and N-Firm Concentration Indexes are used to determine market structure.According to market concentration indexes, higher concentration level means more monopolistic market structure, lower concentration level means more full competitive market structure. In this study concentration levels of media groups in Turkish journalism sector within the scope of traditional journalism and internet journalism was analyzed via N-Firm Concentration and H-H Indexes. As a result of the study, it’s seen that first four biggest media groups have monopolistic competition in internet journalism sector,and oligopol structure in traditional journalism sector. According to H-H index analyze, there is monopolistic competition in the sector.

  7. Journalism and Media Crossing Field Boundaries

    DEFF Research Database (Denmark)

    Svith, Flemming

    public relation journalism in the last decade in Denmark. In a Bourdieuian sense journalism has become generalized capital, recognized and used as a weapon in the symbolic struggles between powerful elites in the news discourse. The paper contributes to the understanding of the impact of changes in media......Journalism and media have been fitted together for decades fulfilling each other needs. However, due to some main drivers as new communication technology and the societal medialization process media and journalism have changed dramatically and in the case of Denmark this symbiosis is broken....... This article explores such changes in Denmark by using key concepts of the French sociologist Pierre Bourdieu in a historical study of media and journalism in the last four decades. Based on data of journalist functions in society and the emergence and distribution of new types of media, combined...

  8. Examining Marketing Journals' Publication Process and Reviewer Practices

    Science.gov (United States)

    Seiler, Vicky L.; Reisenwitz, Timothy H.; Schibrowsky, John A.

    2011-01-01

    This study examines reviewer practices at 11 marketing journals. The results for the top three journals are compared to eight comparable journals that are typically considered to be non-top-tier journals. The results suggest that the reviewers and the review processes at the top journals differ significantly from those of the non-top-tier…

  9. Evaluating Academic Journals without Impact Factors for Collection Management Decisions.

    Science.gov (United States)

    Dilevko, Juris; Atkinson, Esther

    2002-01-01

    Discussion of evaluating academic journals for collection management decisions focuses on a methodological framework for evaluating journals not ranked by impact factors in Journal Citation Reports. Compares nonranked journals with ranked journals and then applies this framework to a case study in the field of medical science. (LRW)

  10. Publishing scientific journals in the digital age: opportunities for small scholarly journals.

    Science.gov (United States)

    Marušić, Ana

    2014-01-01

    Scientific publishing is rapidly developing from print-only to digital journals and extensive use of social media. This essay presents our experience in developing a small and scholarly journal from the so-called scientific semi-periphery and using the advantages of digital publishing to increase the visibility of the journal in international indexing and citation databases, and ensure greater visibility in the global scientific community. An editor of a scientific journal does not need to master all details of different digital publishing tools, but needs to follow the developments so that they can be best implemented in the journal.

  11. How far has The Korean Journal of Internal Medicine advanced in terms of journal metrics?

    OpenAIRE

    Huh, Sun

    2013-01-01

    The Korean Journal of Internal Medicine has already been valued as an international journal, according to a citation analysis in 2011. Now, 2 years later, I would like to confirm how much the Journal has advanced from the point of view of journal metrics by looking at the impact factor, cites per document (2 years), SCImago Journal Rank (SJR), and the Hirsch index. These were obtained from a variety of databases, such as the Korean Medical Citation Index, KoreaMed Synapse, Web of Science, JCR...

  12. Publishing scientific journals in the digital age: opportunities for small scholarly journals.

    Science.gov (United States)

    Marušić, Ana

    2014-01-01

    Scientific publishing is rapidly developing from print-only to digital journals and extensive use of social media. This essay presents our experience in developing a small and scholarly journal from the so-called scientific semi-periphery and using the advantages of digital publishing to increase the visibility of the journal in international indexing and citation databases, and ensure greater visibility in the global scientific community. An editor of a scientific journal does not need to master all details of different digital publishing tools, but needs to follow the developments so that they can be best implemented in the journal. PMID:25711217

  13. Concerned Journals, Editors And ICMJE

    Directory of Open Access Journals (Sweden)

    Ajai R. Singh

    2007-01-01

    Full Text Available This section will detail some important initiatives taken by journal editors in writing about industry influence on academia in particular and medicine in general. It will also look into the Revised Guidelines of the ICMJE vis-à-vis issues related to industry-sponsored research. Journals And Editors In the last chapter, we saw how conflict of interest related to individuals and institutions are discussed and resolved by AAMC. Conflict of interest because of industry's increasing clout has also engaged the attention of editors of important journals and some significant editorials in this connection are worth a close study by all concerned researchers and institutions, for they reflect reasoned responses to disturbing developments. The titles themselves reflect their concern:Is academic medicine for sale? (Angell, N Engl J Med , 2000Angell asks a piquant question of academic medical institutions:'Academic medical institutions are themselves growing increasingly beholden to industry. How can they justify rigorous conflict-of-interest policies for individual researchers when their own ties are so extensive?' Answering as to why Academia-industry connect flourishes, she says: 'Some academic institutions have entered into partnerships with drug companies to set up research centers and teaching programs in which students and faculty members essentially carry out industry research. Both sides see great benefit in this arrangement. For financially struggling medical centers, it means cash. For the companies that make the drugs and devices, it means access to research talent, as well as affiliation with a prestigious "brand." Asking herself the question: 'Why shouldn't clinical researchers have close ties to industry?' she answers it decisively tilts academia's inclinations to serve industry interests in various ways, rather than that of biomedical advance:'One obvious concern is that these ties will bias research, both the kind of work that is done and

  14. EVALUATION OF THE IMPACT OF JOURNAL CLUB AS A TEACHING-LEARNING TOOL AMONG MEDICAL POSTGRADUATE STUDENTS

    OpenAIRE

    Bhagyalakshm; Leela; Sankara Narayana; Kasi Babu

    2016-01-01

    BACKGROUND Journal club is an example of small group method of teaching-learning technique, being an important ingredient in medical education. Journal club has been advocated as a bridge between research and evidence based medical care in practice. It has been recognized as a means of keeping update with the literature; promoting the research activities; promoting evidence based medical care and teaching critical appraisal skills. METHODOLOGY This study assess the role of journal cl...

  15. INIS: Authority list for journal titles

    International Nuclear Information System (INIS)

    This is the 32nd revision of the INIS: Authority List for Journal Titles (IAEA-INIS-11). This list is published annually and includes the titles of all journals which have contained articles submitted to INIS at the time of publication. The current list contains 13,231 journal titles, 2,125 regularly scanned journals and 555 key journals. It was last updated in February 2006. The purpose of this report is to provide descriptive cataloguers with a standard entry for the full title of a journal. In addition to the full journal title, the ISSN (International Standard Serial Number), administered by the ISSN International Centre, Paris, France, and/or CODEN, assigned by Chemical Abstracts Service, USA, are given in this manual. In order to help the user find titles easily, the list is arranged in six parts, followed by summary statistics: In Part I, all key journals are grouped under the name of the country or international organization responsible for their input in INIS, then sorted alphabetically under their title. In Part II, all key journals are sorted alphabetically under their title. The name of the country or international organization responsible for their input in INIS is entered in parentheses within the body of the entry. In Part III, all journals that are regularly scanned by INIS Centres are grouped under the name of the country or international organization responsible for their input in INIS, then sorted alphabetically under their title. In Part IV, all journals that are regularly scanned by INIS Centres are sorted alphabetically under their title. The name of the country or international organization responsible for their input in INIS is entered in parentheses within the body of the entry. In Part V, all journals are grouped under the name of the country or international organization responsible for their input in INIS, then sorted alphabetically under their title. In Part VI, all journals are sorted alphabetically under their title. The name of the

  16. INIS: Authority list for journal titles

    International Nuclear Information System (INIS)

    This is the 31st revision of the INIS: Authority List for Journal Titles (IAEA-INIS-11). This list is published annually and includes the titles of all journals which have contained articles submitted to INIS at the time of publication. The current list contains 13,104 journal titles, 2,078 regularly scanned journals and 561 key journals. It was last updated in February 2005. The purpose of this report is to provide descriptive cataloguers with a standard entry for the full title of a journal. In addition to the full journal title, the ISSN (International Standard Serial Number), administered by the ISSN International Centre, Paris, France, and/or CODEN, assigned by Chemical Abstracts Service, USA, are given in this manual. In order to help the user find titles easily, the list is arranged in six parts, followed by summary statistics: In Part I, all key journals are grouped under the name of the country or international organization responsible for their input in INIS, then sorted alphabetically under their title. In Part II, all key journals are sorted alphabetically under their title. The name of the country or international organization responsible for their input in INIS is entered in parentheses within the body of the entry. In Part III, all journals that are regularly scanned by INIS Centers are grouped under the name of the country or international organization responsible for their input in INIS, then sorted alphabetically under their title. In Part IV, all journals that are regularly scanned by INIS Centers are sorted alphabetically under their title. The name of the country or international organization responsible for their input in INIS is entered in parentheses within the body of the entry. In Part V, all journals are grouped under the name of the country or international organization responsible for their input in INIS, then sorted alphabetically under their title. In Part VI, all journals are sorted alphabetically under their title. The name of the

  17. Brief Introduction ofChina Illuminating Engineering Journal

    Institute of Scientific and Technical Information of China (English)

    2005-01-01

    China Illuminating Engineering Journal,which wasfirst publishedinthe year1987,is a nationwide academic magazine sponsored by ChinaIlluminating Engineering Society(CIES).The goal ofChina IlluminatingEngineering Journalis to demonstrate the most advanced R&Dactivities ofilluminating science,the domestic and international state-of-the-art in thefield of illuminating engineering and the academic activities of Committee ofIlluminating Engineering(CIE)as well as other international illuminatingorganizations;relea...

  18. Cyber Criminology: Evolving a novel discipline with a new journal

    OpenAIRE

    Jaishankar, K

    2007-01-01

    EDITORIAL Cyber Criminology: Evolving a novel discipline with a new journal K. Jaishankar Cyberspace presents an exciting new frontier for criminologists. Virtual reality and computer mediated communications challenge the traditional discourse of criminology, introducing new forms of deviance, crime, and social control (McKenzie 1996). Since the 1990s, academics have observed how the cyberspace has emerged as a new locus of criminal activity (Thomas and Loader 2000; Littlewoo...

  19. EDITORIAL: Why we need a new journal in neural engineering

    Science.gov (United States)

    Durand, Dominique M.

    2004-03-01

    laboratory but also in the publication of scientific papers. We do, therefore, need a new journal that provides a platform for this emerging interdisciplinary field of neural engineering where neuroscientists, neurobiologists and engineers can publish their work in one periodical that spans the disciplines. Journal of Neural Engineering will provide this platform. The new journal will publish full-length articles of the highest quality and importance in the field of neural engineering at the molecular, cellular and systems levels. The scope of Journal of Neural Engineering encompasses experimental, computational and theoretical aspects of neural interfacing, neuroelectronics, neuromechanical systems, neuroinformatics, neuroimaging, neural prostheses, artificial and biological neural circuits, neural control, neural tissue regeneration, neural signal processing, neural modeling and neuro-computation. The scope of the journal has both depth and breadth in areas relevant to the interface between neuroscience and engineering. There will be two Editors-in-Chief, with expertise covering both engineering and neuroscience. Experts in the areas encompassed by the journal's scope have been identified for the Editorial Board and the composition of the board will be continually updated to address the developments in this new and exciting field. The first issue of this new journal covers a variety of topics that combine neuroscience and engineering: mental state recognition from EEG signals, analysis of body motion in Parkinson's patients, non-linear dynamics of the respiratory system, automatic identification of saccade-related visual evoked potentials, multiple electrode stimulators, algorithms to estimate the causal relationship between brain sources, diffusion tensor imaging in the brain and phase synchronization of neural activity in vitro. This broad array of manuscripts focusing on neural imaging, neurophysiology, neural signal processing, neuroelectronics and neuro-dynamics can

  20. June 2013 pulmonary journal club

    Directory of Open Access Journals (Sweden)

    Mathew M

    2013-06-01

    Full Text Available No abstract available. Article truncated at 150 words. National Lung Screening Trial Research Team, Church TR, Black WC, Aberle DR, Berg CD, Clingan KL, Duan F, Fagerstrom RM, Gareen IF, Gierada DS, Jones GC, Mahon I, Marcus PM, Sicks JD, Jain A, Baum S. Results of initial low-dose computed tomographic screening for lung cancer. N Engl J Med. 2013;368(21:1980-91. This paper serves as a follow up on the results of the first round of testing using low dose computed tomography in screening for lung cancer. A full review on the initial results can be referenced from the August 2011 Pulmonary Journal Club (1. The study was performed at 33 centers from 2002 – 2004. A total of 53454 patients were enrolled. Inclusion criteria were age 55-74 and a 30 pack-year smoking history. All patients were randomized to receive either low dose screening CT scan (LDCT or a chest x-ray. The results of the first year of screening showed that …

  1. Bibliometric Study of Infociencia Journal.

    Directory of Open Access Journals (Sweden)

    Yaima Martínez Viciedo

    2012-12-01

    Full Text Available Open Access of information has had great boom nowadays, meanwhile, some authors don’t want to disseminate their knowledge, making difficult the process mentioned before. Some Databases have being created to answer to this problem. Repositories and scientific magazines are other possibilities that the authors have to diffuse their knowledge. In this work it is made a bibliometric study of the electronic journal INFOCIENCIA during five years in which productivity of articles, the origin of bibliography, quantity of articles by themes and if the bibliography was update or not, were determined, for doing it an analysis of bibliometric character was made. It consisted on summarizing, reviewing, identifying and systematizing the obtained information by means of investigations. The obtained results were: The productivity of article has decreased during these five years, being 2008 the year of less production. The number of biographies varies in the evaluated period. The themes with more quantity of articles were: health, agriculture and education. It was proved that persons consulted more bibliography since 5 to 10 years, followed by the last 5 years.

  2. Experiments in Creative Climate Journalism

    Science.gov (United States)

    Kintisch, E. S.

    2011-12-01

    Creative experiments in climate journalism are my aim during a one year fellowship at a university. The goal is to engage the audience's senses, mind, and hopefully, imagination in work about Earth's climate. The work is done in collaboration with students, artists, scientists, musicians and actors, all marshalled to explain how the warming planet works through engaging and innovative means. This session will feature video examples of using design or music to visualize climate data. A video using improvisational actors drinking Red Bull to bring the concept of climate sensitivity to life will be shown. A glossy card designed to spoof an airline safety instruction card will be displayed; its design explains geoengineering techniques and their risks. In doing this work I have benefitted from a fellowship at Massachusetts Institute for Technology, which has provided the precious gift of time and creative atmosphere. I am on leave from Science magazine. I will report on what has and hadn't worked in fostering new means of communicating science in an academic setting. The session will also explore the shifting role of the journalist in this new space. The challenges take me beyond simply using words as a medium between science and the public. I find myself as a convener or producer in engendering partnerships between scientists and great communicators like actors, sculptors or filmmakers.

  3. February 2013 pulmonary journal club

    Directory of Open Access Journals (Sweden)

    Mathew M

    2013-02-01

    Full Text Available No abstract available. Article truncated at 150 words. Effect of pressure support vs unassisted breathing through a tracheostomy collar on weaning duration in patients requiring prolonged mechanical ventilation: a randomized trial. Jubran A, Grant BJ, Duffner LA, Collins EG, Lanuza DM, Hoffman LA, Tobin MJ. JAMA. 2013;309(7:671-7. The rise in prolonged mechanical ventilation has fostered a growth in the need for long term acute care hospitals (LTACH. The February Journal Club reviewed the study looking at ventilator weaning through pressure support trials vs. spontaneous breathing through tracheostomy collar in a LTACH. The study was a randomized trial performed from 2000 - 2010. It was performed at a single long term acute care facility. Patients that required mechanical ventilation for > 21 days and failed a 5 day screening procedure of spontaneous breathing were included in the study. Included patients were randomized to either a pressure support or tracheostomy collar arm. 500 patients were screened, and a total of …

  4. INIS: Authority list for journal titles

    International Nuclear Information System (INIS)

    This is the 35th revision of the INIS: Authority List for Journal Titles (IAEA-INIS-11). This list is published annually and includes the titles of all journals which have contained articles submitted to INIS at the time of publication. The current list contains 13 750 journal titles, 1 965 regularly scanned journals and 593 key journals. It was last updated in March 2009. A journal - or periodical - is a continuing publication issued in a succession of discrete parts, usually bearing numbering and/or chronological designations and intended to be continued indefinitely. It is generally published within a defined, fixed interval between issues and normally appears more than once per year. It includes a mixture of articles, letters, summaries, etc. Within this definition, annuals such as the Annual Review of Nuclear Science are included, but series titles such as the McGraw-Hill Series in Nuclear Engineering are not. The purpose of this document is to provide descriptive cataloguers with standard elements to include in bibliographic level 'S' of the INIS record. These elements include field (tag) 229 (Full Journal Title), 320 (ISSN) and 321 (CODEN). The full journal title is mandatory, and either the ISSN or the CODEN must be included (both may appear). Instructions on how to use this and other elements of the INIS record format are found in INIS: Guide to Bibliographic Description (IAEA-INIS-1). In order to help the user find titles easily, the list is arranged in six parts, followed by summary statistics: - In Part I, all key journals are grouped under the name of the country or international organization responsible for their input in INIS, then sorted alphabetically under their title. - In Part II, all key journals are sorted alphabetically under their title. The name of the country or international organization responsible for their input in INIS is entered in parentheses within the body of the entry. - In Part III, all journals that are regularly scanned by the

  5. High School Journalism Confronts Critical Deadline. A Report by the Journalism Education Association Commission on the Role of Journalism in Secondary Education.

    Science.gov (United States)

    Journalism Education Association.

    In cooperation with the American College Testing (ACT) Program, the Journalism in Education Association conducted a 2-year study to explore the status of high school journalism and, in particular, to determine factual data concerning the values of journalism in secondary education by comparing students with high school journalism/publication…

  6. General regulations about submitting manuscripts to Journal of Palaeogeography

    Institute of Scientific and Technical Information of China (English)

    2012-01-01

    <正>1. Journal of Palaeogeography is an academic earth science journal. The journal mainly publishes research results and original academic articles focusing on palaeogeography and relevant disciplines by both Chinese and foreign scholarsphysiogeographic palaeogeography

  7. Biomedical journals: keeping up and reading critically.

    Science.gov (United States)

    Chase, Karen L; DiGiacomo, Ronald F; Van Hoosier, Gerald L

    2006-09-01

    By extrapolation from studies of physicians, knowledge and practice of laboratory animal medicine and science are expected to become progressively more outdated the longer practitioners are out of school. Keeping up with current literature and practice is a challenge that necessitates the use of many different sources of continuing education. Both veterinarians and physicians consistently list journals as the most beneficial source of new information. Accordingly, they must select from the veterinary and biomedical literature articles that report original studies and systematic reviews and recognize and respond to valid new knowledge to improve diagnostic and therapeutic approaches and maintain consistent clinical skills. Other objectives include selecting journals for general information and for information relevant or specific to one's field of research. Lastly, candidates for board certification need to read articles from journals that potentially provide the basis for questions on the examination. 'High-impact' journals should be identified, and articles should be reviewed critically. In a survey of recent candidates for laboratory animal medicine board examination, these journals included Contemporary Topics (now JAALAS), Comparative Medicine, ILAR Journal, and Laboratory Animals. Strategies for coping with the challenge of staying current with the literature include wise use of technology, journal clubs, and consultation with colleagues. A laboratory animal practitioner can become a better scientist and clinician by evaluating the research performed by others. Thorough, critical review of biomedical literature is paramount to these goals. PMID:16995641

  8. Biomedical journals: keeping up and reading critically.

    Science.gov (United States)

    Chase, Karen L; DiGiacomo, Ronald F; Van Hoosier, Gerald L

    2006-09-01

    By extrapolation from studies of physicians, knowledge and practice of laboratory animal medicine and science are expected to become progressively more outdated the longer practitioners are out of school. Keeping up with current literature and practice is a challenge that necessitates the use of many different sources of continuing education. Both veterinarians and physicians consistently list journals as the most beneficial source of new information. Accordingly, they must select from the veterinary and biomedical literature articles that report original studies and systematic reviews and recognize and respond to valid new knowledge to improve diagnostic and therapeutic approaches and maintain consistent clinical skills. Other objectives include selecting journals for general information and for information relevant or specific to one's field of research. Lastly, candidates for board certification need to read articles from journals that potentially provide the basis for questions on the examination. 'High-impact' journals should be identified, and articles should be reviewed critically. In a survey of recent candidates for laboratory animal medicine board examination, these journals included Contemporary Topics (now JAALAS), Comparative Medicine, ILAR Journal, and Laboratory Animals. Strategies for coping with the challenge of staying current with the literature include wise use of technology, journal clubs, and consultation with colleagues. A laboratory animal practitioner can become a better scientist and clinician by evaluating the research performed by others. Thorough, critical review of biomedical literature is paramount to these goals.

  9. Impact Factors and Prediction of Popular Topics in a Journal.

    Science.gov (United States)

    Nielsen, M B; Seitz, K

    2016-08-01

    The impact factor (IF) for 2015 was recently released and this could be the time to once again reflect on its use as a metric of a journal. Problems and concerns regarding the IF have been addressed extensively elsewhere 1 2. The principle of the IF for a given year is that it represents the average number of citations of articles published in the journal in the two previous years.While authors frequently cite the IF as a determining factor for submission, the IF does not predict how many times individual articles will be cited. In a study from a peer-reviewed cardiovascular journal, nearly half of all published articles were poorly cited, i. e., less than five citations in five years 3. A similar percentage seems to apply to our journal. In nearly all journals we estimate that the majority of citations relate to a minority of the articles. Some articles are never cited. 13 % of the articles published in our journal from 2010 to 2013 have never been cited. Even authors of poorly cited articles benefit from the IF since many institutions use the combined impact factors of their published papers to measure research activity and this may be reflected in their research budgets.The competition for the printed pages in the six annual issues of Ultraschall in der Medizin/European Journal of Ultrasound (UiM/EJU) has resulted in high rejection rates (between 80 % and 90 %). One negative review with recommendation of major revision may therefore result in rejection. Peer-review fraud where the submitting author listed recommended reviewers with fake email addresses supplying fabricated peer reviews has recently been described in the New England Journal of Medicine 4. Some of the editors of our journal believe they have experienced this as well. Fabricating reviews in order to get a high IF for an article is to be considered fraud and is inexcusable.One aspect of using impact factors as a measure of the quality of a journal is that the IF only goes back two years

  10. Learning to teach data journalism: Innovation, influence and constraints

    OpenAIRE

    Hewett, J.

    2016-01-01

    Journalism education has tended to respond slowly to developments in digital journalism, such as data journalism, despite or because of close links with the industry. This paper examines the obstacles to innovation in journalism education with particular reference to data journalism, drawing on the literature, a review of stakeholders and course documents, and the author’s reflections on developing a data journalism module as part of a new MA programme. It highlights the complexities linked t...

  11. Annual Journal citation indices: a comparative study

    CERN Document Server

    Khaleque, Abdul; Sen, Parongama

    2016-01-01

    We study the statistics of citations made to the indexed Science journals in the Journal Citation Reports during the period 2004-2013 using different measures. We consider different measures which quantify the impact of the journals. To our surprise, we find that the apparently uncorrelated measures, even when defined in an arbitrary manner, show strong correlations. This is checked over all the years considered. Impact factor being one of these measures, the present work raises the question whether it is actually a nearly perfect index as claimed often. In addition we study the distributions of the different indices which also behave similarly.

  12. Reflections on 25 Years of Journal Editorship

    Science.gov (United States)

    Matthews, Michael R.

    2015-07-01

    These reflections range over some distinctive features of the journal Science & Education, they acknowledge in a limited way the many individuals who over the past 25 years have contributed to the success and reputation of the journal, they chart the beginnings of the journal, and they dwell on a few central concerns—clear writing and the contribution of HPS to teacher education. The reflections also revisit the much-debated and written-upon philosophical and pedagogical arguments occasioned by the rise and possible demise of constructivism in science education.

  13. JOURNALISM STUDIES IN ARGENTINA: BACKGROUND AND QUESTIONS

    Directory of Open Access Journals (Sweden)

    Adriana Amado

    2014-06-01

    Full Text Available This article summarizes the background of empirical journalism studies in Argentina.  In recent publications, researchers have consistently underscored the lack of data on the profession and the scarce development of theoretical frameworks related to journalism studies.  The local investigations have prioritized approaches and methods that do not give the whole picture of the population of journalists. Most of the research tends to equate media analysis and media messages with journalism study and keeps on failing to provide data that allows for learning about the working conditions and the professional profile of the Argentinean journalists.

  14. Ranking policy and political economic journals

    OpenAIRE

    Halkos, George; Tzeremes, Nickolaos

    2012-01-01

    The purpose of this paper is to rank economic journals in the broader field of policy and political science. By using one composite input and one composite output the paper ranks 52 journals in a linear programming setting using data for the time period of 1996-2010. In addition for the first time three different quality ranking reports have been incorporated into a Data Envelopment Analysis (DEA) modelling problem in order to classify these journals into four categories (‘A’ to ‘D’). The ran...

  15. What medical journal editing means to me

    Directory of Open Access Journals (Sweden)

    Harvey Marcovitch

    2008-01-01

    Full Text Available Papers in medical journals are often difficult to understand and tedious to read. An editor's first loyalty should be to readers, by prioritising readability over merely producing a repository of data for the scientific community generally.The web now provides infinite repository space so there is even less excuse for journals to be unreadable. I give examples of how I attempted to improve one journal, despite external pressures and regardless of how it might affect the Impact Factor. As a postscript I outline increasing involvement in promoting honesty and integrity in publishing through the auspices of the Committee on Publication Ethics (COPE.

  16. Starting an open access journal in Iceland

    OpenAIRE

    Watson, Ian

    2009-01-01

    To access full text version of this article. Please click on the hyperlink "View/Open" at the bottom of this page The Bifröst Journal of Social Science / Tímarit um félagsvísindi is one of Iceland’s first open access journals and the first to use Open Journal Systems software. This article summarizes lessons learned from the first three years of the journal’s operation, including issues connected to funding, staffing, peer review, printing, bibliographic formats, and the future of open acc...

  17. Journal club: Integrating research awareness into postgraduate nurse training

    Directory of Open Access Journals (Sweden)

    Clare Davis

    2014-10-01

    Full Text Available Background: Evidence-based nursing requires nurses to maintain an awareness of recently published research findings to integrate into their clinical practice. In the South African setting keeping up with recent literature has additional challenges, including the diversity of nurses’ home language, geographically foreign origins of published work, and limited economic resources. Students enrolled in a postgraduate programme came from various paediatric settings and displayed limited awareness of nursing literature as an evidence base for practice.Objectives: The study aimed to design and introduce a journal club as an educational strategy into the postgraduate programmes in children’s nursing at the University of Cape Town (UCT, and then to refine the way it is used to best serve programme outcomes and facilitate student learning whilst still being an enjoyable activity.Method: An action research methodology using successive cycles of ‘assess-plan-act-observe’ was used to design, implement and refine the structure of a journal club within the postgraduate diploma programme over four academic years. Six educators actively tracked and reflected on journal club sessions, and then analysed findings during and after each annual cycle to plan improvement and increasing programme alignment.Results: Considerable refinement of the intervention included changing how it was structured, the preparation required by both students and educators, the article selection process and the intervention’s alignment with other learning activities in the programme.Conclusion: Journal club facilitated an increase in student awareness and reading of nursing literature, offering the opportunity to consider application of published research to current nursing practice. Another benefit was enabling students to become familiar with the specialised and technical language of research, children’s nursing and the critical care of children and neonates, by speaking

  18. The Kennedy Report: Commission Evaluates High School Journalism

    Science.gov (United States)

    Heintz, Ann

    1974-01-01

    Presents excerpts from the report of the Kennedy Commission of Inquiry into High School Journalism, concentrating on censorship, minority participation, journalism education, established media, and censorship issues.

  19. Twitter, Journalism and Affective Labour

    Directory of Open Access Journals (Sweden)

    Eugenia Siapera

    2015-03-01

    Full Text Available The rise of the network aspects of journalism in the context of social mediasuch as Twitter, and the increased importance accorded to community building and maintenance as well as to reciprocity, point to the need to take into account the affective part of journalistic labour. This refers to these aspects of journalistic work that are linked to the creation of networks and communities, to interactions with readers and the forming of bonds between journalists and their readers. An analysis of the affective labour of journalists on Twitter, we argue, is necessary in order to understand the potential and ambiguities of this part of their labour. Based on a set of in-depth interviews with Twitter journalists, this article found three main repertoires of affective labour: the organic relations repertoire, which points to the increasing importance of authenticity as a means of establishing credibility on Twitter; the temporal repertoire; and the repertoire of responsibility. The importance of the affective labour of journalism is found in its biopolitical productivity. The development of an organic relationship with followers, the emergence of stronger bonds between core groups that then become communities, the extension of care and help to the network, are all evidence of the importance of this biopolitical productivity and point to the construction of a new and potentially more radical sociopolitical role for journalism. However, this potential is ambiguous insofar as these elements contain unresolved tensions and ambiguities. These include the trade in selves and the associated commodification; the re-formulation of time, especially its diachronic dimension, as accumulation of social capital; the role of reciprocity and responsibility in reproducing inequalities; and care as care for only those deemed deserving. These ambiguities severely undermine and limit the potentials of affective labour, pointing to the need to develop a purposeful political

  20. Misconduct, Marginality and Editorial Practices in Management, Business and Economics Journals

    Science.gov (United States)

    2016-01-01

    Objectives The paper presents data on the two problems of misconduct and marginality in management, business and economics (MBE) journals and their practices to combat these problems. Design Data was collected in three phases. First, all publicly retracted papers in MBE journals were identified through keywords searches in 7 major databases (n = 1329 journals). Second, a focused survey was distributed to editors involved in such retractions (n = 64; response rate = 28%). Finally, a survey was administered to all active journals in the seven databases to collect data on editors’ perceptions and practices related to the two problems (n = 937, response rate = 31.8%). Frequency analyses, cross tabulations, and qualitative analyses of open answers were used to examine the data. Results 184 retracted papers in MBE journals were identified in 2005–2015 (no retraction was found before 2005). From 2005–2007 to 2012–2015, the number of retractions increased by a factor ten with an all-time high in 2015. The survey to journals with reported retractions illustrates how already a few cases of suspected misconduct put a strain on the editorial workload. The survey to all active journals revealed that 42% of the respondents had started to use software to screen all submitted papers, and that a majority recognized the problem of marginality, as indicated by salami-style submissions. According to some editors, reviewers easily spot such submissions whereas others argued that authors may submit thinly sliced papers in parallel to several journals, which means that this practice is only discovered post-publication. The survey question on ways to support creative contributions stimulated a rich response of ideas regarding editorial vision, engaged boards and developmental approaches. The study uses data from three specialized fields, but its findings may be highly relevant to many journals in the social sciences. PMID:27454761

  1. The Crop Journal Calls for Papers

    Institute of Scientific and Technical Information of China (English)

    2014-01-01

    <正>We would like to invite you to submit your latest research accomplishments to The Crop Journal(ISSN:2095-5421;Online ISSN:2214-5141,CN 10-1112/S),a new bimonthly academic journal co-sponsored by the Crop Science Society of China and the Institute of Crop Science,Chinese Academy of Agricultural Sciences.The Crop Journal is freely available online(Open Access) in Science Direct.The Editor-in-Chief of The Crop Journal is Professor Jianmin Wan,PhD,Cheung Kong Scholar,Director of the Institute of Crop Science and Executive Vice President of the Crop Science Society of China,supported by

  2. ELSEVIER SCIENTIFIC JOURNALS AVAILABLE ON YOUR DESKTOP

    CERN Document Server

    1999-01-01

    Elsevier Science Publishers have for decades distributed renowned journals in science and technology, which are now accessible on the Web through their Science Direct service. CERN has been granted a site licence trial period until the end of 1999.Included among the titles are: Astroparticle physics, Computer physics communications, Nuclear instruments and methods in physics research A and B, Nuclear physics A and B, Physics letters A and B, Physics reports, Surface science and Thin solid films.Links to the individual titles appear in our electronic journals list at:http://wwwas.cern.ch/library/electronic_journals/ejAH.htmlThe Library invites all readers to search and download articles of the journals currently subscribed to. You can also access the full Science Direct site at: http://www.sciencedirect.com/(Choose 'group-wide login' or, for a 'personal login' registration, please contact us)All questions and comments are welcome and can be addressed to: library.desk@cern.ch

  3. The journal of irreproducible results II

    CERN Document Server

    Scherr, George H

    1997-01-01

    Compilation of offbeat science papers from the Journal of Irreproducible Results, including: Emotion in the Rat Face; Foamy Beer; Cooking with Potential Energy; The Large-Cake Cutting Problem; Siamese Twinning in Gummy Bears; much more.

  4. The Crop Journal Calls for Papers

    Institute of Scientific and Technical Information of China (English)

    2015-01-01

    <正>We would like to invite you to submit your latest research accomplishments to The Crop Journal(ISSN:2095-5421;Online ISSN:2214-5141,CN 10-1112/S),a new bimonthly academic journal co-sponsored by the Crop Science Society of China and the Institute of Crop Science,Chinese Academy of Agricultural Sciences.The Crop Journal is freely available online(Open Access)in Science Direct.The Editor-in-Chief of The Crop Journal is Professor Jianmin Wan,Ph D,Cheung Kong Scholar,Director of the Institute of Crop Science and Executive Vice President of the Crop Science Society of China,supported by

  5. Utilization of office computer for journal subscription

    International Nuclear Information System (INIS)

    Integrated library automation system has been operating in Japan Atomic Energy Research Institute library, which consists of three subsystems for serials control, book acquisition and circulation control. Functions of the serials control subsystem have been improved to reduce the work load of journal subscription work. Subscription price(both in foreign currency and Japanese yen), conversion factor, foreign currency exchange rate are newly introduced as data elements to a master file for automatic calculation and totalization in the system, e.g. conversion of subscription price from foreign currency into Japanese yen. Some kinds of journal lists are also printed out, such as journal subscription list, journal distribution list for each laboratory, etc. (author)

  6. New accomplishments of Ambiente & Agua scientific journal

    Directory of Open Access Journals (Sweden)

    Getulio Teixeira Batista

    2009-04-01

    Full Text Available Ambiente & Água – An Interdisciplinary Journal of Applied Science (Ambi-Agua was classified as B2 in the Interdisciplinary Area, the major thematic area of this journal, by CAPES classification system known as "Qualis". Also, the journal was registered in the Digital Object Identifier (DOI® System. Three other facts were accomplished: 1 all published articles since April, 2008 have the submitted and accepted dates stamped; 2 long-term preservation will be now secured in association with DOAJ - Lund University Libraries and the e-Depot of the National Library of the Netherlands (KB; and 3 we entered into an electronic licensing relationship with EBSCO Publishing to have full text of our journal in EBSCO Publishing's databases in the near future.

  7. The Crop Journal Calls for Papers

    Institute of Scientific and Technical Information of China (English)

    2014-01-01

    <正>We would like to invite you to submit your latest research accomplishments to The Crop Journal(ISSN:2095-5421;Online ISSN:2214-5141,CN 10-1112/S),a new bimonthly academic journal co-sponsored by the Crop Science Society of China and the Institute of Crop Science,Chinese Academy of Agricultural Sciences.The Crop Journal is freely available online(Open Access)in ScienceDirect.The Editor-in-Chief of The Crop Journal is Professor Jianmin Wan,PhD,Cheung Kong Scholar,Director of the Institute of Crop Science and Executive Vice President of the Crop Science Society of China,supported by the Editorial Board of 85 international experts from various fields of crop sciences.

  8. INIS: Authority list for journal titles

    International Nuclear Information System (INIS)

    This is the 33rd revision of the INIS: Authority List for Journal Titles (IAEA-INIS-11). This list is published annually and includes the titles of all journals which have contained articles submitted to INIS at the time of publication. The current list contains 13 396 journal titles, 2 170 regularly scanned journals and 578 key journals. It was last updated in February 2007. A journal - or periodical - is a continuing publication issued in a succession of discrete parts, usually bearing numbering and/or chronological designations and intended to be continued indefinitely. It is generally published within a defined, fixed interval between issues and normally appears more than once per year. It includes a mixture of articles, letters, summaries, etc. Within this definition, annuals such as the Annual Review of Nuclear Science are included, but series titles such as the McGraw-Hill Series in Nuclear Engineering are not. The purpose of this document is to provide descriptive cataloguers with standard elements to include in bibliographic level 'S' of the INIS record. These elements include field (tag) 229 (Full Journal Title), 320 (ISSN) and 321 (CODEN). The full journal title is mandatory, and either the ISSN or the CODEN must be included (both may appear). Instructions on how to use this and other elements of the INIS record format are found in INIS: Guide to Bibliographic Description (IAEA-INIS-1). In order to help the user find titles easily, the list is arranged in six parts, followed by summary statistics: - In Part I, all key journals are grouped under the name of the country or international organization responsible for their input in INIS, then sorted alphabetically under their title. - In Part II, all key journals are sorted alphabetically under their title. The name of the country or international organization responsible for their input in INIS is entered in parentheses within the body of the entry. - In Part III, all journals that are regularly scanned by

  9. Journaling: An Effective Approach to Professional Development For Reflective Teachers

    Institute of Scientific and Technical Information of China (English)

    Wang Peng

    2008-01-01

    As a new curriculum reform program was put forward in China,higher standards for teachers were given that teachers must have a potential of reflective development.Continuing and effective professional development is a common concern of most teachers and professional educators.Effective professional development usually means that not only does it have immediate impact on the work of the professional educator,but it has a long lasting impact.Unfortunately,such effective professional development activities are rare and,in turn,costly to the organization.The purpose of this paper is to demonstrate a form of effective professional development which is not only economical but effective.That is the reflective journal.This article analyzes the application of Journal writing from these aspects of the definition,content and the procedures.

  10. Bibliometric analysis of the 'Electronic Library' journal (2000-2010

    Directory of Open Access Journals (Sweden)

    Akhtar Hussain

    2011-06-01

    Full Text Available This study aims to present a bibliometric analysis of the Electronic Library journal, the aim being to offer a summary of research activity in library and information science and characterize its most important aspects. The paper analyzes a bibliometric study of 578 articles were published during the period January 1, 2000 to December 31, 2010 in the Electronic Library journal. The paper covers the bibliometric analyses of year-wise distribution of articles, category-wise classification of papers, subject-wise distribution of articles, authorship patterns, and institutions-wise distribution of contributions. Special issues of the Electronic Library brought out during 2000-2010, and prolific authors during 2000 to 2010 have been analyzed.

  11. Editorial: Biotechnology Journal brings more than biotechnology.

    Science.gov (United States)

    Jungbauer, Alois; Lee, Sang Yup

    2015-09-01

    Biotechnology Journal always brings the state-of-the-art biotechnologies to our readers. Different from other topical issues, this issue of Biotechnology Journal is complied with a series of exiting reviews and research articles from spontaneous submissions, again, addressing society's actual problems and needs. The progress is a real testimony how biotechnology contributes to achievements in healthcare, better utilization of resources, and a bio-based economy.

  12. Journal of Undergraduate Research, Volume VI, 2006

    Energy Technology Data Exchange (ETDEWEB)

    Faletra, P.; Schuetz, A.; Cherkerzian, D.; Clark, T.

    2006-01-01

    Students who conducted research at DOE National Laboratories during 2005 were invited to include their research abstracts, and for a select few, their completed research papers in this Journal. This Journal is direct evidence of students collaborating with their mentors. Fields in which these students worked include: Biology; Chemistry; Computer Science; Engineering; Environmental Science; General Sciences; Materials Sciences; Medical and Health Sciences; Nuclear Sciences; Physics; and Science Policy.

  13. Bibliographic reviews in Cuban medical journals.

    OpenAIRE

    Lucitere Rodríguez González

    2008-01-01

    Background: Bibliographic reviews acquire great importance in the specific context of medical publications; however, some editorial facts can affect their scientific value. Objective: To characterize the bibliographic reviews published by some Cuban medical journals. Methods: The most recent reviews (10) were analyzed by means of an exploratory, retrospective and descriptive study. Selected from 5 electronic medical journals, summing up 50 articles. The following variables were studied: artic...

  14. The 21st century chemistry journal

    OpenAIRE

    Steven M. Bachrach

    1999-01-01

    Internet publication will radically alter how chemists will publish their research in the next century. In this article, we describe two fundamental changes: enhanced chemical publication which allows chemists to publish materials that cannot be published on paper and end-user customization which allows readers to read articles prepared to meet their specifications. These concepts have been implemented within the Internet Journal of Chemistry, a new journal designed to employ the latest techn...

  15. Developing Quantitative Models for Auditing Journal Entries

    OpenAIRE

    Argyrou, Argyris

    2013-01-01

    The thesis examines how the auditing of journal entries can detect and prevent financial statement fraud. Financial statement fraud occurs when an intentional act causes financial statements to be materially misstated. Although it is not a new phenomenon, financial statement fraud has attracted much publicity in the wake of numerous cases of financial malfeasance (e.g. ENRON, WorldCom). Existing literature has provided limited empirical evidence on the link between auditing journal entrie...

  16. ICONARP INTERNATIONAL JOURNAL OF ARCHITECTURE AND PLANNING

    OpenAIRE

    Architecture and Planning, ICONARP International Journal of

    2014-01-01

    ICONARP as an e-journal considers original articles, research briefs, book reviews and viewpoints in peer-reviewed. ICONARP is an exciting new venture occurred with experiences, theoretical approaches, critical and empirical studies in the field of architecture and planning. The journal aims to be a platform for the studies of design, education and iv application and has a goal to be a bridge in between traditional/modern, east/west, local/global in the disciplines of Architecture / Planning....

  17. A journal ranking for the ambitious economist

    OpenAIRE

    Kristie M. Engemann; Wall, Howard J.

    2009-01-01

    The authors devise an "ambition-adjusted" journal ranking based on citations from a short list of top general-interest journals in economics. Underlying this ranking is the notion that an ambitious economist wishes to be acknowledged not only in the highest reaches of the profession, but also outside his or her subfield. In addition to the conceptual advantages that they find in their ambition adjustment, they see two main practical advantages: greater transparency and a consistent treatment ...

  18. References in the Australasian Medical Journal

    Directory of Open Access Journals (Sweden)

    Prakash Adhikari

    2010-12-01

    Full Text Available BackgroundReferences serve as an important tool in providing credibility to the published literature and to assist retrieval of the cited and related information. This study was done to observe the accuracy of references in articles published in Australasian Medical Journal.Method Fifty references were randomly selected from two different issues of Australasian Medical Journal (AMJ: Volume 3, Number 11, 2010 and Volume 3, Number 10, 2010. The instructions for authors of this journal were examined. References from each article were compared with the original for accuracy, using the following six elements: 1 authors; including spelling, initials, order and number; 2 title, including spelling and punctuation; 3 journal name, including use of correct abbreviation as listed in Index Medicus; 4 year; 5 volume; and 6 page numbers, including first and last page numbers. Citations were considered incorrect if there was an error in any of these six elements. References not cited from indexed journals were excluded. Statistical analysis was done by using frequency and percentage.ResultsResults show that 14.0% references in AMJ were inaccurate. Most common errors were author’s name and journal name. Author’s names were found to be incorrect in 10.0% references while journal name (either incorrect abbreviations or incorrect instructions or punctuation errors were found to be incorrect in 4.0%. Least common error was found in writing the title of the article (2.0%. There were no errors found in other elements.ConclusionErrors in citing the references are also found in the AMJ. The quoted error in this study (14.0% is comparable to other international literature. The majority of errors are avoidable. So, the authors, editors and the reviewers have to check for any errors seriously before publication in the journal.

  19. Flipping journals to open: Rethinking publishing infrastructure

    OpenAIRE

    Fecher, Benedikt; Wagner, Gert G.

    2015-01-01

    The resignation of the editorial board of an Elsevier-owned linguistics journal and its open access reorganization could get the ball rolling for other journals to follow suit. This case is a reminder that open access means more than just providing access to an article; it means rethinking the whole process of publishing. Open access also raises important questions about who owns the critical information infrastructure for online publishing.

  20. Pathways to Internationalize Brazilian Journals of Psychology

    OpenAIRE

    Estêvão C. Gamba; Abel Laerte Packer; Rogerio Meneghini

    2015-01-01

    AbstractThe science of psychology has been developing in the country of Brazil over the last 50 years. Nonetheless, most of the science in this field is published only in Brazilian journals. Overall, Brazil has yet to share its science with the international community. The potential to internationalize the science generated by Brazilian psychologists exists, though. One way would be to scale up the publication of Brazilian psychologists in international journals. Another way would be to inter...

  1. International Journal of Herbal Medicine (IJHM): A New Open-Access International Journal

    OpenAIRE

    Joshi, Rakesh K.

    2013-01-01

    It is with pleasure that we introduce the first issue of online journal “International Journal of Herbal Medicine (IHJM)” a bimonthly publication of AkiNik Publications. The Journal is peer-reviewed, broad-spectrum and committed to the promotion of research and dissemination of knowledge in Phytochemistry, Pharmacognosy, Essential oil chemistry, Natural product chemistry, Botany, Biochemistry, Biotechnology, Marine research and related multidiscipline. IJHM also provides an advanced internati...

  2. Open Journal Systems 2.0: the Evolution of Open Source Journal Management

    OpenAIRE

    Willinsky, J.; M. Quint

    2005-01-01

    Purpose. To provide an insider’s review of the journal management and publishing software, Open Journal Systems (OJS), from the Public Knowledge Project, which the author directs at the University of British ColumbiaDesign. The paper outlines the history, development, and features of OJS, including some of the experimental aspects, as well as early research results and work underway on which it is based.Findings. Open Journal Systems is an open source solution to managing and publishing schol...

  3. Evaluating Journal Quality: A Review of Journal Citation Indicators and Ranking in Business and Management

    OpenAIRE

    Mingers, John; Yang, Liying

    2016-01-01

    Abstract: Evaluating the quality of academic journal is becoming increasing important within the context of research performance evaluation. Traditionally, journals have been ranked by peer review lists such as that of the Association of Business Schools (UK) or though their journal impact factor (JIF). However, several new indicators have been developed, such as the h-index, SJR, SNIP and the Eigenfactor which take into account different factors and therefore have their own particular biases...

  4. Student-Teacher Dialogue Journals as a Tool for Developing Interactional Ability. Tesi di Laurea in Lingua Inglese.

    Science.gov (United States)

    Morini, Emanuela

    A study investigated the features of discourse in the written student-teacher interaction in dialogue journals. It was assumed that such an activity would encourage the negotiation of meaning and roles, and that the data would provide evidence of that negotiation. Data were drawn from 32 journals written by 16-to-18-year-old students in an Italian…

  5. New (and old Trends in Journalism Research

    Directory of Open Access Journals (Sweden)

    Nelson Traquina

    2006-06-01

    Full Text Available In this paper, I look back to the vast area of communication sciences, that fi rst arrived in the university sphere by means of journalism subjects. In reality, one of the fi rst academic magazines in the area of communication sciences was a magazine concerning journalism. During the 1940´s and 1950´s, journalism research was at the center of the renowned studies by Lazarsfeld. In the years that follow, Journalism study´s dependence on sociological inquiries and content analysis was left behind in the explosion of studies that took place in the 1960´s and 70`s. In the more recent years, the explosion of studies of Journalism was marked by the recourse to a multiplicity of new methodologies (such as, for example, the ethno-methodological approach, discursive analysis, focus groups, by the emergence and growing infl uence of television, by the interest relating to journalism´s ideological role, as well as by the appearance of new paradigms for understanding the news.

  6. Documenting the Earliest Chinese Journals

    Directory of Open Access Journals (Sweden)

    Jian-zhong (Joe Zhou

    2001-10-01

    Full Text Available

    頁次:19-24

    According to various authoritative sources, the English word "journal" was first used in the 16lh century, but the existence of the journal in its original meaning as a daily record can be traced back to Acta Diuma (Daily Events in ancient Roman cities as early as 59 B.C. This article documents the first appearance of Chinese daily records that were much early than 59 B.C.

    The evidence of the earlier Chinese daily records came from some important archaeological discoveries in the 1970's, but they were also documented by Sima Qian (145 B.C. - 85 B.C., the grand historian of the Han Dynasty imperial court. Sima's lifetime contribution was the publication of Shi Ji (史記 (The Grand Scribe's Records, the Records hereafter. The Records is a book of history of a grand scope. It encompasses all Chinese history from 30lh century B.C. through the end of the second century B.C. in 130 chapters and over 525,000 Chinese

  7. Insights from Brazilian medical journals

    Directory of Open Access Journals (Sweden)

    Bruno Caramelli

    2009-01-01

    Full Text Available This brand-new series of articles aims at delivering to national and international readers some of the cutting-edge contributions from the Brazilian medical literature. Recently papers published in the main Brazilian medical journals are carefully selected and analyzed by skilled medical editors. In addition we asked editors to choose keywords to be highlighted in order to claim for reader's attention. Articles are organized by area of interest to facilitate reading. To get the most of the limited available editorial space we did not include the names of the authors of the related articles in the text itself but a complete reference guide is provided at the end of the article. The result carries the most important messages from the original paper accompanied by a personal interpretation. Directed to the busy medical doctor we hope that this initiative may help in the successful translation of knowledge from scientific evidence to clinical practice.Esta nova série de artigos tem por objetivo levar aos leitores nacionais e internacionais algumas das mais importantes contribuições provenientes da literatura médica brasileira recente. Os artigos originais mais relevantes são selecionados por experientes editores a quem solicitamos que escolham palavras- chaves para que sejam destacadas para chamar a atenção do leitor. Para facilitar a leitura, os artigos são organizados por área de interesse. Para aproveitar ao máximo o limitado espaço editorial não são incluídos os nomes dos autores dos artigos. Entretanto, a referência completa é oferecida ao final do artigo. O resultado final traz o que há de melhor do artigo, seguido de uma sintética interpretação pessoal. Endereçado ao médico ocupado, esperamos que esta inciativa possa contribuir para o sucesso da translação do conhecimento da evidência científica para a prática clínica.

  8. READING JOURNAL AS A WAY TO IMPROVE STUDENTS COMPREHENSION TOWARD A TEXTBOOK READING MATERIAL

    Directory of Open Access Journals (Sweden)

    Menik Winiharti

    2015-04-01

    Full Text Available Reading journal is one way to record students independent learning based on text they read. This study was conducted to find out the students level of reading comprehension through some notes written in the reading journal, the extent to which the activity of writing reading journals improved students reading comprehension, whether the students got benefit from reading journal. There were 104 respondents coming from four different departments in Bina Nusantara University were asked to read a text related to the subject they learned in a certain session. Then they were assigned to write a journal that records the things they had read. When this task was finished, the lecturer ran a quiz containing related questions to check whether they really understood the content of the text. Afterwards, students were to fill in a questionnaire regarding their opinion on the impact of the reading journal toward their reading comprehension. The findings indicate that more than half of the participants appear to understand the material well, and the task plays a certain role in improving students understanding. The most crucial thing is that most students think they get benefit by writing the reading journal.

  9. A review of cardiopulmonary research in Brazilian medical journals: clinical, surgical and epidemiological data.

    Science.gov (United States)

    Serrano, Carlos; Rocha e Silva, Mauricio

    2010-04-01

    Research in the field of cardiopulmonary disease in Brazil has been very active in recent decades. The combination of PUBMED, SCieLO, open access and online searching has provided a significant increase in the visibility of Brazilian journals. This newly acquired international visibility has in turn resulted in the appearance of more original research reports in the Brazilian scientific press. This review is intended to highlight part of this work for the benefit of the readers of "Clinics." We searched through PUBMED for noteworthy articles published in Brazilian medical journals included in the Journal of Citation Reports of the Institute of Scientific Information to better expose them to our readership. The following journals were examined: "Arquivos Brasileiros de Cardiologia," "Arquivos Brasileiros de Endocrinologia e Metabologia," "Brazilian Journal of Medical and Biological Reviews," "Jornal Brasileiro de Pneumologia," "Jornal de Pediatria," "Revista Brasileira de Cirurgia Cardiovascular," "Revista da Associação Médica Brasileira," Revista da Escola de Enfermagem U.S.P." and "São Paulo Medical Journal." These journals publish original investigations in the field of cardiopulmonary disease. The search produced 71 references, which are briefly examined.

  10. RSS (http://www.iaees.org/publications/journals/piaees/rss.xml

    Directory of Open Access Journals (Sweden)

    Proceedings of the International Academy of Ecology and Environmental Sciences (ISSN 2220-8860

    Full Text Available Proceedings of the International Academy of Ecology and Environmental Sciences ISSN 2220-8860 URL: http://www.iaees.org/publications/journals/piaees/online-version.asp RSS: http://www.iaees.org/publications/journals/piaees/rss.xml E-mail: piaees@iaees.org Editor-in-Chief: WenJun Zhang Aims and Scope PROCEEDINGS OF THE INTERNATIONAL ACADEMY OF ECOLOGY AND ENVIRONMENTAL SCIENCES (ISSN 2220-8860; CODEN PIAEBW is an open access, peer-reviewed international journal that considers scientific articles in all different areas of ecology and environmental sciences. It is the flagship journal of the International Academy of Ecology and Environmental Sciences. It dedicates to the latest advances in ecology and environmental sciences. The goal of this journal is to keep a record of the state-of-the-art research and promote the research work in these fast moving areas. The topics to be covered by this journal include, but are not limited to theory, methodology, technology, innovation, activity, and project in the following areas: •Animal ecology, plant/microbe ecology, wetland ecology, farmland ecology, forest/grassland ecology, marine ecology, pollution ecology, etc. •Biological conservation & preservation, ecosystem restoration, environmental policy, environmental toxicology, environmental pollution and control, natural resource, bioenergy research, environmental technology, waste management, environmental economics, environmental management & planning, environmental education, environmental engineering, global climate change, oceanography, etc. Authors can submit their works to the email box of this journal, piaees@iaees.org. All manuscripts submitted to this journal must be previously unpublished and may not be considered for publication elsewhere at any time during review period of this journal. Authors are asked to read Author Guidelines before submitting manuscripts. In addition to free submissions from authors around the world, special issues are

  11. Subject Journal Review: Personnel Management and Industrial Psychology.

    Science.gov (United States)

    Herman, Georgianna

    1984-01-01

    This annotated bibliography lists 35 primary journals devoted to personnel management and industrial psychology in such categories as human resource planning, employee training, compensation, and employment law. History of the field, journal selection, journal specializations (for practitioners and academicians), journal indexing/abstracting,…

  12. Deal or No Deal? Evaluating Big Deals and Their Journals

    Science.gov (United States)

    Blecic, Deborah D.; Wiberley, Stephen E., Jr.; Fiscella, Joan B.; Bahnmaier-Blaszczak, Sara; Lowery, Rebecca

    2013-01-01

    This paper presents methods to develop metrics that compare Big Deal journal packages and the journals within those packages. Deal-level metrics guide selection of a Big Deal for termination. Journal-level metrics guide selection of individual subscriptions from journals previously provided by a terminated deal. The paper argues that, while the…

  13. Characteristics of Open Access Journals in Six Subject Areas

    Science.gov (United States)

    Walters, William H.; Linvill, Anne C.

    2011-01-01

    We examine the characteristics of 663 Open Access (OA) journals in biology, computer science, economics, history, medicine, and psychology, then compare the OA journals with impact factors to comparable subscription journals. There is great variation in the size of OA journals; the largest publishes more than 2,700 articles per year, but half…

  14. Open access to social science journals in Latin America

    OpenAIRE

    Babini, Dominique

    2010-01-01

    During the 2000s, Latin America has contributed to the development of alternative journal portalsintended to improve the visibility of and accessto regionally published socialscience journals. The relatively poor visibility ofregional journals and their authorsis often due to budgetary constraintsforthe distribution of printed journals, and theirlimited presence in international indexes. These are an incentive forthe development of open access(OA)

  15. Recent changes in peer-reviewed dermatology journals

    OpenAIRE

    Ahmad Al Aboud; Khalid Al Aboud

    2012-01-01

    Peer-reviewed dermatology journals are essential media for dermatologists and are undergoing many changes to satisfy readers and authors. The number of dermatology journals and new journals that are devoted to dermatology subspecialties that are being published is increasing. This report highlights recent changes in peer-reviewed dermatology journals.

  16. 49 CFR 230.101 - Steam locomotive driving journal boxes.

    Science.gov (United States)

    2010-10-01

    ... 49 Transportation 4 2010-10-01 2010-10-01 false Steam locomotive driving journal boxes. 230.101... Locomotives and Tenders Running Gear § 230.101 Steam locomotive driving journal boxes. (a) Driving journal boxes. Driving journal boxes shall be maintained in a safe and suitable condition for service. Not...

  17. 49 CFR 230.102 - Tender plain bearing journal boxes.

    Science.gov (United States)

    2010-10-01

    ... 49 Transportation 4 2010-10-01 2010-10-01 false Tender plain bearing journal boxes. 230.102... Locomotives and Tenders Running Gear § 230.102 Tender plain bearing journal boxes. Plain bearing journal boxes... expected to damage the bearing; or have a detrimental effect on the lubrication of the journal and...

  18. Contribution of Journals to Academic Disciplines

    Directory of Open Access Journals (Sweden)

    Lee, Hye-Young

    2015-03-01

    Full Text Available This research uses a new approach to analyze the extent of influence journal papers have on the progress of varied research fields by estimation of subject-based influence on research other than impact factor that relies on citation index. It is initiated with the hypothesis that earlier established citation relations between journal and citing paper, which reveals the research field that contains the highest citation index and hence has received the greatest contribution from a particular journal, would have inconsistent contribution to the research field over the year of journal publication. The target research is primarily 128 journal papers and 4,123 citing papers from Information Systems Research published in the years 2001, 2004, 2007, and 2010. The characteristics of citation history and hallmarks of research field of citing papers were studied and analysis on significant distinction between citing fields based on the year of publication was performed. The analysis results show the order of citation rate to be highest from Computer Science (2,221 cases, Business & Economics (2,191 cases, and Information Science & Library Science (1,901 cases. The citation history of the journal, nonetheless, indicates increase in citation during 2-3 years after the earliest publication till it achieves constant citation. The statistical analysis shows significant variation in citing fields in accordance with the publication year; especially in 2010, journal contribution has increased in the fields of Business & Economics, Operations Research & Management Science, and Health Care Sciences & Services but, however, is reduced in Education & Educational Research and Social Sciences - Other Topics.

  19. EVALUATION OF THE IMPACT OF JOURNAL CLUB AS A TEACHING-LEARNING TOOL AMONG MEDICAL POSTGRADUATE STUDENTS

    Directory of Open Access Journals (Sweden)

    Bhagyalakshm

    2016-01-01

    Full Text Available BACKGROUND Journal club is an example of small group method of teaching-learning technique, being an important ingredient in medical education. Journal club has been advocated as a bridge between research and evidence based medical care in practice. It has been recognized as a means of keeping update with the literature; promoting the research activities; promoting evidence based medical care and teaching critical appraisal skills. METHODOLOGY This study assess the role of journal club as a teaching-learning tool by recording the perception of post graduates on journal club through a questionnaire based survey. RESULTS The scores for most of the items of fifteen point questionnaire were above three indicating that learning through journal club method is satisfactory. DISCUSSION The use of journal club should help the post graduate students see the connections between theory, research and practice aspects. The value of journal club is that it can promote better understanding of research process and improved ability to critically appraise research. CONCLUSION Many of the post graduate medical students perceived that journal club enhances the skills, promote evidence based medical care and update the knowledge on recent advances and felt that journal club must be scheduled regularly as a part of teaching-learning method in post graduate curriculum.

  20. Ranking Predatory Journals: Solve the Problem Instead of Removing It!

    Science.gov (United States)

    Dadkhah, Mehdi; Bianciardi, Giorgio

    2016-01-01

    Predatory journals are a well-known issue for scholarly publishing and they are repositories for bogus research. In recent years, the number of predatory journals has risen and it is necessary to present a solution for this challenge. In this paper, we will discuss about a possible ranking of predatory journals. Our ranking approach is based on Beall’s criteria for detection of predatory journals and it can help editors to improve their journals or convert their questionable journals to non-predatory ones. Moreover, our approach could help young editors to protect their journals against predatory practice. Finally, we present a case study to clarify our approach. PMID:27123411

  1. AGU journals increase in importance according to 2010 Impact Factors

    Science.gov (United States)

    Cook, Bill

    2011-07-01

    AGU journals continue to rank highly in many categories in the 2010 Journal Citation Report (JCR), which was released by Thomson Reuters on 28 June. JCR reports on several measures of journal usage, including a journal's Eigenfactor score, its Article Influence score, its Impact Factor, and its rank within a cohort of similar journals. According to the 2010 statistics, AGU again has outperformed its larger competitors. Four different AGU titles are ranked in the top three journals in six different cohorts. The Impact Factor of several AGU journals increased significantly over the previous year.

  2. The fourteen editors of the Journal of the South African Veterinary Association: 1927-2000 : information

    Directory of Open Access Journals (Sweden)

    R.D. Bigalke

    2000-07-01

    Full Text Available The initial motivation for having an article on the editors of the journal published in the year 2000 was to commemorate the 70 years of the existence of the Journal of the South African Veterinary Association. However, in conducting the research required to write the article it was established that the journal dates from 1927. Consequently the journal was about 73 rather than 70 years old at the end of 1999. During this period it has been faithfully served by 14 editors. This article contains a relatively brief description of the life histories, in relation to their terms of office as editors, of these editors, of whom 4 are still alive and actively pursuing their respective careers

  3. A Simple Model of Interaction between Journals, Authors and Editorial Board Members

    Institute of Scientific and Technical Information of China (English)

    ZOU Sheng-Rong; XU Ying-Ying; XU Xiu-Lian; WANG Jian; HE Da-Ren

    2011-01-01

    Recently, quantitative study on complex systems has become an attractive research area for physicists. Human scientific activity, including scientific paper publication, is an important complex system and therefore deserves an investigation. We present a simple model to describe the interaction between journals, authors and editorial board members. In the model the probabilities, with which a journal accepts papers from an author or invites him as an editorial board member, obey normal distributions. However, the most probable value of the latter distribution shifts such that the journal can have higher level authors being its editorial board members. The analytic derivation by the model is in rather good agreement with the empirical observation from the selected fifteen worldwide journals with different impact factors.

  4. Educational Technology Research Journals: "Journal of Distance Education," 2003-2012

    Science.gov (United States)

    Young, Eric H.; Griffiths, Ty; Luke, Brandon; West, Richard E.

    2014-01-01

    In this study the authors analyzed articles published in the "Journal of Distance Education" from 2003-2012. They analyzed the frequency of author-provided keywords and common abstract phrases, type and frequency of authorship, the type of research method employed, and the number of citations the journal and specific articles received.…

  5. Educational Technology Research Journals: "Journal of Computer Assisted Learning," 2002-2011

    Science.gov (United States)

    Welch, Kyle R.; Zabriskie, Grant D.; Ashton, Scott M.; Borup, Jered; West, Richard E.

    2014-01-01

    In this study, the authors analyzed all research articles published between 2002 and 2011 in the "Journal of Computer Assisted Learning," in order to understand the research topics methods, major contributing authors, and most-cited publications. Over the 10-year period, they found the journal has explored educational uses of computer…

  6. Educational Technology Research Journals: "Journal of Research on Technology in Education," 2001-2010

    Science.gov (United States)

    Billings, Christopher; Nielsen, P. Lynne; Snyder, Aaron; Sorensen, Alec; West, Richard E.

    2012-01-01

    In this study, the authors examined the "Journal of Research on Technology in Education (JRTE)" to discover trends from 2001-2010 in the topics covered in the articles, article types (including research methods used), authorship, and citation frequency. Articles from the journal dealt mostly with PK-12 settings and focused on technology…

  7. Journal Impact Factors and Self-Citations: Implications for Psychology Journals

    Science.gov (United States)

    Anseel, Frederik; Duyck, Wouter; De Baene, Wouter; Brysbaert, Marc

    2004-01-01

    Comments on the study by J. G. Adair and N. Vohra (see record 2003-02034-002) of changes in the number of references and citations in psychology journals as a consequence of the current knowledge explosion. They made a striking observation of the sometimes excessive number of self-citations in psychology journals. However, after this illustration,…

  8. What's Ethical and What's Not in Electronic Journalism: Perceptions of News Directors. Radio-Television Journalism.

    Science.gov (United States)

    Wulfemeyer, K. Tim

    A study examined the perceptions about what is and is not ethical behavior in electronic journalism. Subjects, 220 television news directors and 66 radio news directors, responded to a 117-item survey of ethics in electronic journalism. Results indicated that the news directors identified: (1) 10 "acceptable" behaviors, including working a second…

  9. Classroom Journal Club: Collaborative Study of Contemporary Primary Literature in the Biomechanics Classroom.

    Science.gov (United States)

    Kuxhaus, Laurel; Corbiere, Nicole C

    2016-07-01

    Current engineering pedagogy primarily focuses on developing technical proficiency and problem solving skills; the peer-review process for sharing new research results is often overlooked. The use of a collaborative classroom journal club can engage students with the excitement of scientific discovery and the process of dissemination of research results, which are also important lifelong learning skills. In this work, a classroom journal club was implemented and a survey of student perceptions spanning three student cohorts was collected. In this collaborative learning activity, students regularly chose and discussed a recent biomechanics journal article, and were assessed based on specific, individual preparation tasks. Most student-chosen journal articles were relevant to topics discussed in the regular class lecture. Surveys assessed student perceptions of the activity. The survey responses show that, across all cohorts, students both enjoyed the classroom journal club and recognized it as an important learning experience. Many reported discussing their journal articles with others outside of the classroom, indicating good engagement. The results demonstrate that student engagement with primary literature can foster both technical knowledge and lifelong learning skills. PMID:26902674

  10. Guest editorial:Travels with the Journal

    Directory of Open Access Journals (Sweden)

    P.S. Kruger

    2012-01-01

    Full Text Available

    With due respect to: Travels with my Aunt (1969: A novel by Graham Greene and Travels with a Donkey in the Cévennes (1879: An adventure story by Robert Louis Stevenson


    The Beginning


    Now this is not the end. It is not even the beginning of the end. But it is, perhaps, the end of the beginning. Sir Winston Leonard Spencer Churchill (1874 – 1965
    Prior to the publishing of the first edition of the South African Journal of Industrial Engineering in June 1987, publishing opportunities in South Africa for Industrial Engineering material were somewhat limited. The main publications catering for some aspects of Industrial Engineering were the FWP-Journal (established 1961 and to some extent ORiON (established 1985. Even internationally rather few journals existed dedicated solely to Industrial Engineering with notable exceptions being the IIE-Transactions (established 1969 and Computers and Industrial Engineering (established 1975 both from the United States of America. At present the Directory of Open Access Journals lists a total of 18 journals with Industrial Engineering as their main subject area.

  11. Why Are Scholarly Journals Costly even with Electronic Publishing?

    OpenAIRE

    Galyani-Moghaddam, Golnessa

    2009-01-01

    Journal literature has long played a prominent role in the scholarly communication chain. In recent decades, however, the scholarly communication system has been facing a crisis due to the ever-escalating costs of journals. This paper examines the reasons for the high costs of scholarly journals. A brief review of literature on journal publishing costs was carried out. The paper focuses on the economics of scholarly English language journals published mainly in the United States and Europe, b...

  12. Reporting of Ethical Issues in Indian Physiotherapy Journals

    OpenAIRE

    Sabapathy, S; Janakiraman, K; Srikesavan, CS; Ayyanar

    2009-01-01

    Background: Reporting of ethical issues in published articles not only improves the credibility of the journal and its published articles but also increases the confidence of the readers and general public. Purpose: The current study aimed to determine the current prevalence of reporting ethical issues in Indian Physiotherapy journals. Materials and methods: Two physiotherapy journals, the Journal of Indian Association of Physiotherapists (JIAP) and Indian Journal of Physiotherapy and O...

  13. The Development of the Journal Environment of Leonardo

    CERN Document Server

    Salah, Alkim Almila Akdag

    2010-01-01

    We present animations based on the aggregated journal-journal citations of Leonardo during the period 1974-2008. Leonardo is mainly cited by journals outside the arts domain for cultural reasons, for example, in neuropsychology and physics. Articles in Leonardo itself cite a large number of journals, but with a focus on the arts. Animations at this level of aggregation enable us to show the history of the journal from a network perspective.

  14. Misconduct Policies in High-Impact Biomedical Journals

    OpenAIRE

    Bosch, Xavier; Hernández, Cristina; Pericas, Juan M.; Doti, Pamela; Marušić, Ana

    2012-01-01

    Background It is not clear which research misconduct policies are adopted by biomedical journals. This study assessed the prevalence and content policies of the most influential biomedical journals on misconduct and procedures for handling and responding to allegations of misconduct. Methods We conducted a cross-sectional study of misconduct policies of 399 high-impact biomedical journals in 27 biomedical categories of the Journal Citation Reports in December 2011. Journal websites were revie...

  15. Electronic journal management systems experiences from the field

    CERN Document Server

    Ives, Gary W

    2013-01-01

    Discover how to manage your library's electronic journals?with tips from those who've already met the challenge!The explosive growth of electronic journals presents unique challenges for libraries. Electronic Journal Management Systems: Experiences from the Field comprehensively examines these complex topics, including explanations of the automated systems libraries have developed or adopted, licensing issues, and the provision of access to electronic journals. Respected library professionals discuss their own experiences in the implementation and use of electronic journal management systems,

  16. Comparison of Traditional Versus Evidence-Based Journal Club Formats

    OpenAIRE

    Kathleen Packard, PharmD, MS, BCPS; Megan Herink, PharmD, BCPS; Thomas L. Lenz, PharmD, MA

    2011-01-01

    AbstractPurpose: The objective of the study was to compare a traditionally structured journal club with an evidence based structured journal club during an advanced clinical pharmacy rotation and to determine the best utilization that aligns with recent changes to the pharmacy school accreditation standards.Methods: The study included 21 students who completed journal club utilizing the traditional journal club format and 24 students who utilized an evidence based journal club format. Backgro...

  17. Research on Children's Play: Analysis of Developmental and Early Education Journals from 2005 to 2007

    Science.gov (United States)

    Cheng, Mei-Fang; Johnson, James E.

    2010-01-01

    Our review examined four early childhood journals ("Early Child Development and Care," "Early Childhood Education Journal," "Journal of Research in Childhood Education," and "Early Childhood Research Quarterly") and four developmental science journals ("Child Development," "Developmental Psychology," "Journal of Applied Developmental…

  18. Adequacy of pharmacological information provided in pharmaceutical drug advertisements in African medical journals.

    Directory of Open Access Journals (Sweden)

    Oshikoya KA

    2009-06-01

    Full Text Available Pharmaceutical advertisement of drugs is a means of advocating drug use and their selling but not a substitute for drug formulary to guide physicians in safe prescribing. Objectives: To evaluate drug advertisements in Nigerian and other African medical journals for their adequacy of pharmacological information. Methods: Twenty four issues from each of West African Journal of Medicine (WAJM, East African Medical Journal (EAMJ, South African Medical Journal (SAMJ, Nigerian Medical Practitioner (NMP, Nigerian Quarterly Journal of Hospital Medicine (NQJHM and Nigerian Postgraduate Medical Journal (NPMJ were reviewed. While EAMJ, SAMJ and NMP are published monthly, the WAJM, NQJHM and NPMJ are published quarterly. The monthly journals were reviewed between January 2005 and December 2006, and the quarterly journals between January 2001 and December 2006. The drug information with regards to brand/non-proprietary name, pharmacological data, clinical information, pharmaceutical information and legal aspects was evaluated as per World Health Organisation (WHO criteria. Counts in all categories were collated for each advertiser.Results: Forty one pharmaceutical companies made 192 advertisements. 112 (58.3% of these advertisements were made in the African medical journals. Pfizer (20.3% and Swipha (12.5% topped the list of the advertising companies. Four (2.1% adverts mentioned generic names only, 157 (81.8% mentioned clinical indications. Adults and children dosage (39.6%, use in special situations such as pregnancy and renal or liver problems (36.5%, adverse effects (30.2%, average duration of treatment (26.0%, and potential for interaction with other drugs (18.7% were less discussed. Pharmaceutical information such as available dosage forms and product and package information {summary of the generic and proprietary names, the formulation strength, active ingredient, route of administration, batch number, manufactured and expiry dates, and the

  19. SELECTED TITLES OF RECENT JOURNALS

    Institute of Scientific and Technical Information of China (English)

    1992-01-01

    920204 Study on the relationship betweenhematopoietic growth factor activities in theplasma of bone marrow transplantation reci-pients and hematopoietic reconstruct-ion.REN Hanyun (任汉云),et al.Instit Hematol,Beijing Med Univ.Chin J Hematol 1991;12 (10):

  20. Analysis of papers in radiological journals in recent years: a comparison of journal of Korean radiologic society and radiology

    International Nuclear Information System (INIS)

    The purpose of this study was to determine current trends and the mode of future development in the field of medical radiology and to promote research among the nation's radiologists by analyzing the contents of the Journal of the Korean Radiologic Society(JKRS) and Radiology. The number of articles published in JKRS each year between 1990 and 1994 was counted. The research articles in JKRS(n=740) and in Radiology(n=1748) between 1992 and 1994 were categorized according to the objective, type, topic, materials, and radiologic techniques of their contents on the basis of predetermined criteria. Domestic Masters theses(n=126) and doctoral dissertations(n=75) accepted between 1990 and 1994, and domestic materials published in international journals (n=416) between 1986 and 1994 were also categorized using the same criteria. The greatest increase in the number of articles published in JKRS was seen during 1994. The majority of these aimed to retrospectively analyse the findings of diseases while the majority of articles published in Radiology dealt prospectively with the development and/or evaluation of diagnostic methods. More variety of topics and issues was seen in Radiology than in JKRS. The number of articles of domestic materials published in international journals increased from 1986 to 1994, while the number of articles of foreign materials published in Korea was relatively stationary : A significant number of theses and dissertations dealt, mostly prospectively, with studies of pathophysiologic and/or pharmacologic mechanisms using animal models. In order to understand both current trends and the direction and mode of future developments in the field of radiology, and to be able to actively deal with challenges at the forefront of radiologic development, it is essential to review research articles published in radiology-related journals

  1. Mapping the Journal of Homosexuality: A Preface.

    Science.gov (United States)

    Wahlert, Lance

    2016-01-01

    This article serves as a Preface to the supplementary section of this special issue on "Mapping Queer Bioethics," in which we take a solipsistic turn to "map" the Journal of Homosexuality itself. Born contemporaneously with the depathologization of "homosexuality" in the early 1970s, how does the Journal of Homosexuality's commitment to LGBT health issues the past four decades reveal longstanding tensions between medical pathology, cultural appropriation, and political progress? Introducing the articles that follow (each of which examines a seminal medical-themed subject from the journal's history), this article asks how LGBT-sensitive academic texts play complicit roles in both the reinforcement and the liberation of queer subjects in biomedical discourse.

  2. The Reading of Cultural and Lifestyle Journalism

    DEFF Research Database (Denmark)

    From, Unni

    2010-01-01

    ‘reading positions’. These ‘reading positions’ are characterized not only as objectively and ideologically determined categories (Hall 1973), but also as subjectively constituted (Schrøder 2000) ways for audiences to negotiate personal and professional interests related to their engagement in the (cultural......Based on analyses of 25 qualitative individual interviews with readers from different demographic backgrounds, this article investigates how readers experience and use journalism on culture in both online and print press. I argue that the use of journalism on culture is constituted within different...... etc.). Thus, the article explores whether and how the use of journalism on culture is interrelated with more universal processes of meaning production, and therefore it draws on a socio-cognitive perspective, especially in regard to schemes of expectation and experience (e.g. Bruun 2004; Waldahl 1998...

  3. Deep Impact: Unintended consequences of journal rank

    CERN Document Server

    Brembs, Björn

    2013-01-01

    Much has been said about the increasing bureaucracy in science, stifling innovation, hampering the creativity of researchers and incentivizing misconduct, even outright fraud. Many anecdotes have been recounted, observations described and conclusions drawn about the negative impact of impact assessment on scientists and science. However, few of these accounts have drawn their conclusions from data, and those that have typically relied on a few studies. In this review, we present the most recent and pertinent data on the consequences that our current scholarly communication system has had on various measures of scientific quality (such as utility/citations, methodological soundness, expert ratings and retractions). These data confirm previous suspicions: using journal rank as an assessment tool is bad scientific practice. Moreover, the data lead us to argue that any journal rank (not only the currently-favored Impact Factor) would have this negative impact. Therefore, we suggest that abandoning journals altoge...

  4. What is the position of Clinical and Experimental Reproductive Medicine in its scholarly journal network based on journal metrics?

    OpenAIRE

    Huh, Sun

    2014-01-01

    Objective Clinical and Experimental Reproductive Medicine (CERM) converted its language to English only beginning with the first issue of 2011. From that point in time, one of the goals of the journal has been to become a truly international journal. This paper aims to identify the position of CERM in its scholarly journal network based on the journal's metrics. Methods The journal's metrics, including citations, countries of author affiliation, and countries of citing authors, Hirsch index, ...

  5. The Journal of Anatomy: origin and evolution.

    Science.gov (United States)

    Morriss-Kay, Gillian

    2016-07-01

    The Journal of Anatomy was launched 150 years ago as the Journal of Anatomy and Physiology, in an age when anatomy and physiology were not regarded as separate disciplines. European science in general was advancing rapidly at the time (it was 7 years after publication of Darwin's Origin of Species), and the recent demise of the Natural History Review meant that there was no English language publication covering these subjects. The founding editors were George Murray Humphry of Cambridge and William Turner of Edinburgh, together with Alfred Newton of Cambridge and Edward Perceval Wright of Dublin (the last two served only for a year). The pivotal event leading to the Journal's foundation was the 1866 meeting of the British Association, at which Humphry delivered the 'Address in Physiology' (printed in the first issue). Turner, who was also present at the 1866 British Association meeting, remained as a member of the editorial team for 50 years and was a major contributor of Journal articles. The title was changed to Journal of Anatomy in October 1916, when it was taken under the wing, in terms of both management and ownership, by the Anatomical Society. This article reviews the early years of the Journal's publication in more detail than later years because of the historical interest of this less familiar material. The subject matter, which has remained surprisingly consistent over the years, is illustrated by examples from some notable contributions. The evolution of illustration techniques is surveyed from 1866 to the present day; the final section provides brief summaries of all of the chief editors. PMID:27278888

  6. The Journal of Anatomy: origin and evolution.

    Science.gov (United States)

    Morriss-Kay, Gillian

    2016-07-01

    The Journal of Anatomy was launched 150 years ago as the Journal of Anatomy and Physiology, in an age when anatomy and physiology were not regarded as separate disciplines. European science in general was advancing rapidly at the time (it was 7 years after publication of Darwin's Origin of Species), and the recent demise of the Natural History Review meant that there was no English language publication covering these subjects. The founding editors were George Murray Humphry of Cambridge and William Turner of Edinburgh, together with Alfred Newton of Cambridge and Edward Perceval Wright of Dublin (the last two served only for a year). The pivotal event leading to the Journal's foundation was the 1866 meeting of the British Association, at which Humphry delivered the 'Address in Physiology' (printed in the first issue). Turner, who was also present at the 1866 British Association meeting, remained as a member of the editorial team for 50 years and was a major contributor of Journal articles. The title was changed to Journal of Anatomy in October 1916, when it was taken under the wing, in terms of both management and ownership, by the Anatomical Society. This article reviews the early years of the Journal's publication in more detail than later years because of the historical interest of this less familiar material. The subject matter, which has remained surprisingly consistent over the years, is illustrated by examples from some notable contributions. The evolution of illustration techniques is surveyed from 1866 to the present day; the final section provides brief summaries of all of the chief editors.

  7. Reader construction in interactive online journalism

    DEFF Research Database (Denmark)

    Hartley, Jannie Møller

    how online journalists are constructing their readers, seeking to explain how these views affect practices of journalism. Gans idea of the “constructed public” is re-visited, by analyzing the newsroom negotiations between one hand enabling the user participation and on the other hand their very...... be seen as journalistic positioning strategies and interactivity and mediated connectivity as both vital and challenging for the very field of journalism. This indicates that not only do the different kinds of interactivity seem to imply different kind of readers – they also seem to imply different ideals...

  8. The Danish Journal of Management and Business

    DEFF Research Database (Denmark)

    Bukh, Per Nikolaj; Klausen, Kurt Klaudi; Minbaeva, Dana;

    2015-01-01

    The editorial board of the Danish Journal of Management and Business has gone through a few recent changes. In 2014 the board was supplemented with professor Dana Minbaeva from Department of Strategic Management and Globalization at Copenhagen Business School and professor Niels Peter Mols from...... Department of Economics and Business at Aarhus University. Further, from this issue the Journals Editorin-Chief, professor Flemming Poulfelt from Department of Management, Politics and Philosophy at Copenhagen Business School, will be stepping down from the editorial board and Per Nikolaj Bukh from Aalborg...

  9. The dynamics of triads in aggregated journal-journal citation relations: specialty developments at the above-journal level

    NARCIS (Netherlands)

    W. de Nooy; L. Leydesdorff

    2015-01-01

    Dyads of journals—related by citations—can agglomerate into specialties through the mechanism of triadic closure. Using the Journal Citation Reports 2011, 2012, and 2013, we analyze triad formation as indicators of integration (specialty growth) and disintegration (restructuring). The strongest inte

  10. Timelag between submission and publication of an article to scientific journal. Special feature: Scientific journal, today

    International Nuclear Information System (INIS)

    As to the period till the papers that researchers contributed to journals are published and the period till the papers published in journals are contained in data bases, investigation was carried out on three main journals in atomic energy field. Moreover, also as to the issue of preprints which have been circulated in the field of physics, investigation was carried out. As the results of investigation, the period till being published in journlas was from 6 months to 16 months, and the period till being contained in data bases was from 4 months to 9 months. Since preprints are issued by several months earlier than journals, those have large merit for the quick publication of the results of researches. There are about 10,000 scientific journals that publish the papers in atomic energy field in the world. Journals are the place where researchers publish the results of researches and the important information source for knowing the recent trend of research. The procedure of publishing contributed papers in journals is explained. The method of investigating the time lag and the results are reported. The examination of papers by editorial committee takes time. (K.I.)

  11. Welcome to Bioengineering: A New Open-Access Journal

    Directory of Open Access Journals (Sweden)

    Anthony Guiseppi-Elie

    2013-12-01

    Full Text Available It is my great pleasure to welcome you to a new open access journal, Bioengineering, which represents a scope that fits squarely with the core expertise and growing ambitions and interests of bioengineers globally. Of particular interest are the transdisciplinary and translational research represented by the activities within centers and institutes where the biological sciences and engineering disciplines cohabit seamlessly for a focus on solutions to global challenges in human, veterinary and ecological health, bioenergy, bioprocess and sustainability. Bioengineering emphasizes the publication of novel and high quality peer reviewed articles via an open access platform. The scope includes: [...

  12. An evaluation of forestry journals using bibliometric indices

    Directory of Open Access Journals (Sweden)

    Chrisovalantis Malesios

    2012-11-01

    Full Text Available The increasing number of scientific journals, especially over thelast 20 years, created the need for methodologies based on simple metrics, to accurately capture the “quality” of those journals and their impact on the scientific community. Especially in the case of journals from the field of forestry, relatively little work has been conducted on providing valid journal classifications. In this paper we attempt to assess the impact of journals from this field in terms of bibliometric data. In addition to the already proposed metrics (complementary to the journal h-index, we also apply a new measureto rank journals, that provides a more balanced evaluation of the journal performance, by adjusting for various biases affecting the h-index. We examined the relationships between various bibliometric indicators proposed for assessing the journal impact and wo found high correlations between most indices, with only few exceptions. According to citation analysis, Canadian Journal of Forest Research, Journal of Vegetation Science, Forest Science, Tree Physiology, International Journal of Wildland Fire, Holzforschung, Trees-Structure and Function, Silva Fennica, Agricultural and Forest Meteorology and Wood and Fiber Science are the top forestry journals.These publish articles related to all the domains of forestry science. More specialized journals are also included, dealing with specific issues of scientific interest and also of major importance to the scientific community.

  13. An evaluation of forestry journals using bibliometric indices

    Directory of Open Access Journals (Sweden)

    Chrisovalantis Malesios

    2012-12-01

    Full Text Available The increasing number of scientific journals, especially over the last 20 years, created the need for methodologies based on simple metrics, to accurately capture the “quality” of those journals and their impact on the scientific community. Especially in the case of journals from the field of forestry, relatively little work has been conducted on providing valid journal classifications. In this paper we attempt to assess the impact of journals from this field in terms of bibliometric data. In addition to the already proposed metrics (complementary to the journal h-index, we also apply a new measure to rank journals, that provides a more balanced evaluation of the journal performance, by adjusting for various biases affecting the h-index. We examined the relationships between various bibliometric indicators proposed for assessing the journal impact and wo found high correlations between most indices, with only few exceptions. According to citation analysis, Canadian Journal of Forest Research, Journal of Vegetation Science, Forest Science, Tree Physiology, International Journal of Wildland Fire, Holzforschung, Trees-Structure and Function, Silva Fennica, Agricultural and Forest Meteorology and Wood and Fiber Science are the top forestry journals. These publish articles related to all the domains of forestry science. More specialized journals are also included, dealing with specific issues of scientific interest and also of major importance to the scientific community. 

  14. Learning How to Respond to Current Events: Partner Journals between U. S. Preservice Teachers and Children

    Science.gov (United States)

    Camicia, Steven P.; Dobson, Dorothy

    2010-01-01

    The representation of a variety of stakeholders' voices during the deliberation of public issues is vital for the proper functioning of a liberal democracy. This qualitative study examined an activity involving deliberation among children and preservice teachers in the United States. In the activity that we call partner journals, children were…

  15. The Evolution of the American Journal of Psychology, 1904-1918: A Network Investigation.

    Science.gov (United States)

    Green, Christopher D; Feinerer, Ingo

    2016-01-01

    In an earlier article, we used digital historical methods to examine the first 14 volumes (1887-1903) of The American Journal of Psychology (AJP) by creating networks of the vocabularies used in every substantive article the journal published in those years. These networks showed us the major research groups that had been gathered together by the journal's founder-editor, G. Stanley Hall, and how the intellectual composition of the journal (and the discipline) changed over that 17-year period. In the present article we extended that study forward, creating networks for the next 15 volumes (1904-1918), broken into time blocks of 5 years each. Our findings, in brief, were that vision research (especially color) continued to play as consistent and prominent role in the journal as it had since the start; that memory, association, and some higher mental processes were active areas of research throughout; that Hall continued to have an on-again, off-again relationship with theoretical and philosophical psychology; that intelligence-measuring methods, psychoanalysis, and psychophysics were periodically popular enough that they each generated a cluster in 1 of the 3 time blocks; and that Titchener's participation in the editing of AJP led to its becoming the major outlet for his Structuralist research program (an absence that we noted in our earlier studies of the journal Psychological Review). PMID:27424420

  16. The Evolution of the American Journal of Psychology, 1904-1918: A Network Investigation.

    Science.gov (United States)

    Green, Christopher D; Feinerer, Ingo

    2016-01-01

    In an earlier article, we used digital historical methods to examine the first 14 volumes (1887-1903) of The American Journal of Psychology (AJP) by creating networks of the vocabularies used in every substantive article the journal published in those years. These networks showed us the major research groups that had been gathered together by the journal's founder-editor, G. Stanley Hall, and how the intellectual composition of the journal (and the discipline) changed over that 17-year period. In the present article we extended that study forward, creating networks for the next 15 volumes (1904-1918), broken into time blocks of 5 years each. Our findings, in brief, were that vision research (especially color) continued to play as consistent and prominent role in the journal as it had since the start; that memory, association, and some higher mental processes were active areas of research throughout; that Hall continued to have an on-again, off-again relationship with theoretical and philosophical psychology; that intelligence-measuring methods, psychoanalysis, and psychophysics were periodically popular enough that they each generated a cluster in 1 of the 3 time blocks; and that Titchener's participation in the editing of AJP led to its becoming the major outlet for his Structuralist research program (an absence that we noted in our earlier studies of the journal Psychological Review).

  17. Impact Factors and Prediction of Popular Topics in a Journal.

    Science.gov (United States)

    Nielsen, M B; Seitz, K

    2016-08-01

    The impact factor (IF) for 2015 was recently released and this could be the time to once again reflect on its use as a metric of a journal. Problems and concerns regarding the IF have been addressed extensively elsewhere 1 2. The principle of the IF for a given year is that it represents the average number of citations of articles published in the journal in the two previous years.While authors frequently cite the IF as a determining factor for submission, the IF does not predict how many times individual articles will be cited. In a study from a peer-reviewed cardiovascular journal, nearly half of all published articles were poorly cited, i. e., less than five citations in five years 3. A similar percentage seems to apply to our journal. In nearly all journals we estimate that the majority of citations relate to a minority of the articles. Some articles are never cited. 13 % of the articles published in our journal from 2010 to 2013 have never been cited. Even authors of poorly cited articles benefit from the IF since many institutions use the combined impact factors of their published papers to measure research activity and this may be reflected in their research budgets.The competition for the printed pages in the six annual issues of Ultraschall in der Medizin/European Journal of Ultrasound (UiM/EJU) has resulted in high rejection rates (between 80 % and 90 %). One negative review with recommendation of major revision may therefore result in rejection. Peer-review fraud where the submitting author listed recommended reviewers with fake email addresses supplying fabricated peer reviews has recently been described in the New England Journal of Medicine 4. Some of the editors of our journal believe they have experienced this as well. Fabricating reviews in order to get a high IF for an article is to be considered fraud and is inexcusable.One aspect of using impact factors as a measure of the quality of a journal is that the IF only goes back two years

  18. Survey Research in the Forest Science Journals - Insights from Journal Editors

    Directory of Open Access Journals (Sweden)

    Mirjana Stevanov

    2015-06-01

    Full Text Available Background and Purpose: Survey research is one of the most commonly applied approaches in the social sciences. In the forest research it has been used for more than five decades. In spite of that or the fact that the amount of survey-based articles in the forest science journals has increased during the last decade, their share in all articles published in 20 forest science journals (9,372 articles, 2005-2014 is quite modest (3.2%. In our paper we look at the opinions and attitudes of forest science journal editors towards survey research, as their perspective might enlarge our understanding of the use of this approach in the field of forestry. Materials and Methods: We selected 20 forest science journals - 15 from the SCI list and five non-SCI journals and contacted editors of these journals with the self-administered e-mail questionnaire. Data were collected in October 2014 and analyzed by descriptive statistics. The overall response rate was 75%. The assumptions for the study were based on the evidence addressing opinions and attitudes of journal editors from other research fields (finance since no similar study was found in the field of forestry. Results: The majority of editors reported the same review process for survey-based articles as for all others. In two journals, articles with the survey-based content are screened more rigorously and in two journals their publishing is generally discouraged. 40% of journal editors hold the view that no difference should be made between survey research and other types of original research, and another 40% think that survey research should in the first place play a complementary role. As the main strength of survey research editors see the possibility to obtain data unavailable from other sources. They perceive adverse selection and the difficulty to generalize results as the main weaknesses. Conclusions: Editors of forest science journals have similar opinion on survey research as those from the

  19. Status of iberomerican journals of psychology at the 2010 Journal Citation Reports

    OpenAIRE

    Raúl Quevedo-Blasco; Wilson lópez-lópez

    2011-01-01

    The aim of this study is to show the current landscape of the visibility and popularity of scientific journals in psychology published in Latin American countries, according to a recent Journal Citation Reports (JCR) 2010. This is a descriptive study using analysis of documents. We analyzed a total of 18 journals, of which 61.11 % (11) are Spanish, 33.33 % (6) are Latin American and 5.55 % (1) Portuguese, 50 % are indexed in the category of “Psychology, Multidisciplinary “ and the Latin Ameri...

  20. So, why do we still have journals?

    Science.gov (United States)

    Hut, R.

    2014-12-01

    The academic article is a relic from a bygone age. Form and style have not changed much since the days of Einstein and Wegener, nor have the institutions that publish our academic knowledge. When I google-scholar an article, I do not care if it was published in nature, PNAS, or the annals of the cambodian society of herbologists. I care about the scientific knowledge contained in the article, that I would like to use in my own work. So: why do we have journals again? The journal-based system of scientific publication is cracking under its own weight. The publish or perish culture leads to an ever increasing number of articles, each containing less actual science, because spreading over multiple papers helps your career. Journal editors complain that the average number of scientists that they approach for reviewing has gone up because there is no incentive in being a reviewer, only in being reviewed. And finally: much research money is wasted because reviewers point out fundamental flaws in experiment setups after the fact. In this talk, I will present a new way of publishing scientific knowledge. A departure of the classic systems, my way aims to keep the thoroughness of the peer reviewed system, increase the effective use of funding and make more scientific knowledge publically available. Also, it abolishes the need for journals.