20 research outputs found

    Lump-Sum Bonus Satisfaction: Testing the Construct Validity of a New Pay Satisfaction Dimension

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    There are both practical and theoretical reasons to measure lump-sum bonus satisfaction. The practical need for such a measure stems from its increased use as a component in modern compensation practices. Based on the means of administering and allocating lump-sum bonuses, a theoretical case can be built suggesting that lump-sum bonus satisfaction constitutes a separate component of pay satisfaction fitting into the Pay Satisfaction Questionaire\u27s (PSQ) theoretical framework. We develop 4 questions that complement the PSQ, and use a series of techniques to test the convergent and discriminant validity of the measure. Empirical evidence shows that bonus-related items are more related to the lump-sum bonus satisfaction measure than other PSQ dimensions. We also demonstrate that the dimension of lump-sum bonus satisfaction has a substantive relationship with attitudinal variables beyond that provided by pay level variables and the PSQ. The development of this measure should foster greater accuracy when assessing pay satisfaction levels and the effects of lump-sum bonus pay policies

    Zwi臋kszenie granicy stabilno艣ci w trakcie skrawania poprzez zastosowanie aktywnego uchwytu obr贸bkowego

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    In this paper the results of simulation of vibration suppression during machining are presented. Two versions of the active clamp system were examined. In the case when the work-piece vibration dominates one direction, the active clamp system with 1 degree of freedom (l-DOF) can be used. Also, a 2-DOF system is proposed to show the effectiveness of the active clamp system for a complex vibration scenario.W artykule przedstawiono koncepcj臋 modyfikacji w艂a艣ciwo艣ci dynamicznych przedmiotu obrabianego poprzez zastosowanie aktywnego uchwytu mocuj膮cego. Zalet膮 prezentowanego rozwi膮zania, w por贸wnaniu do innych metod, jest mo偶liwo艣膰 pracy z przedmiotami o du偶ej r贸偶norodno艣ci. Ponadto, nie ma potrzeby wprowadzania dodatkowych modyfikacji w obrabianym przedmiocie. W pracy przedstawione zosta艂y wyniki symulacji numerycznych ukazuj膮ce redukcj臋 amplitudy drga艅 w trakcie obr贸bki dla dw贸ch wariant贸w konstrukcyjnych aktywnego uchwytu

    Experimental testing of MEMS pressure sensor using laser vibrometer

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    W artykule przedstawiono problematyk臋 do艣wiadczalnych bada艅 dynamicznych mikrouk艂ad贸w elektromechanicznych (MEMS) na przyk艂adzie czujnika ci艣nienia. Zaprezentowano stanowisko badawcze wykorzystuj膮ce wibrometr laserowy. W zwi膮zku z trudno艣ciami wymuszania dynamicznego MEMS zaproponowano metod臋 wzbudzania uk艂adu za pomoc膮 przetwornika piezoelektrycznego a nast臋pnie por贸wnano i om贸wiono wyniki bada艅 uzyskanych przy zastosowaniu r贸偶nych sygna艂贸w wymuszaj膮cych.The growth of technological capabilities in the field of manufacturing and machining of microelectromechanical systems (MEMS) results in the trend toward devices miniaturization. In many applications it is necessary to carry out experiments of MEMS (e.g. dynamic parameters identification), which in conjunction with miniature dimensions, turns out difficult [1]. Problematic is both a dynamic excitation of such structures vibrations recording. The paper presents the process and results of dynamic testing of MEMS structure using laser vibrometer. Section 2 presents test object, the pressure sensor, which was chosen due to the presence of a flexible diaphragm having a distinct form of vibration. In Section 3 the test stand, consisting of laser vibrometer, microscope, a PC with dedicated Polytec software and Signal Generator is described [3]. Due to impossibility of application of standard dynamic excitation (e.g. impact test or shaker) the piezoelectric transducer was proposed as an alternative [6]. The software enables generating both deterministic signals (e.g. Sine wave, Sweep, Square) as well as non-deterministic (Pseudo Random, Random Burst) by a signal generator coupled to the power supply. Section 4 includes the course of research and in Section 5 the comparison of test results for all applied excitation signals is presented. The summary and conclusions can be found in Section 6
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