scholarly journals Development of Power Assist Crane Operated by Tensional Information of Dual Wire

2013 ◽  
Vol 25 (6) ◽  
pp. 931-938 ◽  
Author(s):  
Naoyuki Takesue ◽  
◽  
Tomoyuki Mine ◽  
Rikiya Makino ◽  
Kousyun Fujiwara ◽  
...  

Cranes and hoists at automotive assembly plant handle heavy objects such as batteries to decrease the physical burden on personnel. On/off button operations in such devices during fine positioning increase personnel mental stress. On the other hand, in power assist using force sensors which directly measure operating force, maneuverability is improved but we should be concerned about sensor weight, signal wiring, wire breakage and so on. Therefore, in this study, a power assist system driven by two wires is developed to improvemaneuverability andmaintenance. The method we propose estimates operating force and work load from tensional information on wires and controls the position of work by admittance control. The effectiveness of the proposed method is shown from confirmation and power assist experiments.

2019 ◽  
Vol 26 (4) ◽  
pp. 415-430
Author(s):  
Francesco Bagnardi ◽  
Valentina Petrović

In this article we examine the episode of labour discontent that occurred at the Fiat-Chrysler assembly plant in Kragujevac, Serbia, in the summer of 2017. The article traces the process through which the two main trade unions organised and channelled labour unrest at the plant level. Drawing on Offe and Wiesenthal’s conceptualisation of workers’ collective action dilemma, the case highlights the trade-off between on the one hand the need for institutional legitimation and on the other hand responsiveness to workers’ demands. We attempt to show that unions still have space in which to represent workers’ interests effectively when disputes emerge, regardless of unfavourable structural constraints and legacies. The article shows that not even traditionally non-conflictual and legacy unions can be fully sheltered from democratic pressures from workers and competitor organisations. Therefore, the ability to mediate between democratic and bureaucratic logics of action and legitimation remains crucial for any union and determines unions’ ability to represent effectively the interests of labour. Dans cet article, les auteurs examinent l’épisode de mécontentement des travailleurs qui s’est produit à l’usine d’assemblage Fiat-Chrysler à Kragujevac, en Serbie, à l’été 2017. L’article retrace le processus par lequel les deux principaux syndicats ont organisé et canalisé les conflits de travail au niveau de l’usine. En se fondant sur la conceptualisation développée par Offe et Wiesenthal du choix de l’action collective des travailleurs, ce cas met en évidence le compromis entre, d’une part, le besoin de légitimation institutionnelle et, d’autre part, la capacité à répondre aux demandes des travailleurs. Les auteurs tentent de montrer que les syndicats disposent encore de l’espace nécessaire pour représenter efficacement les intérêts des travailleurs lorsque des conflits surgissent, indépendamment des contraintes structurelles et de l’héritage défavorables qui leur ont été laissés. Cet article montre que même les syndicats traditionnellement non conflictuels et ceux issus du passé ne peuvent pas être totalement à l’abri des pressions démocratiques des travailleurs et des organisations concurrentes. Par conséquent, la capacité de médiation entre les logiques démocratiques et bureaucratiques de l’action et de la légitimation demeure primordiale pour tout syndicat et détermine la capacité des syndicats à représenter efficacement les intérêts des travailleurs. Im vorliegenden Artikel untersuchen wir die Auseinandersetzungen zwischen der Belegschaft und der Unternehmensleitung im Fiat-Chrysler-Montagewerk in Kragujevac, Serbien im Sommer 2017. Der Artikel zeichnet nach, wie die beiden großen betrieblich vertretenen Gewerkschaften die Unzufriedenheit der Arbeitnehmer auf der Werksebene kanalisiert und organisiert haben. Unter Bezugnahme auf Offes und Wiesenthals Konzeptualisierung des Dilemmas des kollektiven Handelns von Arbeitnehmern ist dieser Fall symptomatisch für den Zielkonflikt zwischen der Notwendigkeit institutioneller Legitimation einerseits und dem Reaktionsvermögen auf Forderungen von Arbeitnehmern andererseits. Wir versuchen nachzuweisen, dass Gewerkschaften nach wie vor Handlungsspielräume haben, um in Konfliktfällen Arbeitnehmerinteressen ungeachtet struktureller Einschränkungen und Altlasten effektiv zu vertreten. Der Artikel zeigt, dass nicht einmal traditionell konsensorientierte Gewerkschaften und Rechtsnachfolger der früheren sozialistischen Gewerkschaften umfassend vor demokratisch legitimiertem Druck von Arbeitnehmern und Mitbewerberorganisationen geschützt werden können. Die Fähigkeit, zwischen demokratischer und bürokratischer Handlungslogik und Legitimation vermitteln zu können, ist deshalb für alle Gewerkschaften von entscheidender Bedeutung und bestimmt ihre Fähigkeit, die Interessen von Arbeitnehmern wirksam zu vertreten.


1999 ◽  
Vol 173 ◽  
pp. 249-254
Author(s):  
A.M. Silva ◽  
R.D. Miró

AbstractWe have developed a model for theH2OandOHevolution in a comet outburst, assuming that together with the gas, a distribution of icy grains is ejected. With an initial mass of icy grains of 108kg released, theH2OandOHproductions are increased up to a factor two, and the growth curves change drastically in the first two days. The model is applied to eruptions detected in theOHradio monitorings and fits well with the slow variations in the flux. On the other hand, several events of short duration appear, consisting of a sudden rise ofOHflux, followed by a sudden decay on the second day. These apparent short bursts are frequently found as precursors of a more durable eruption. We suggest that both of them are part of a unique eruption, and that the sudden decay is due to collisions that de-excite theOHmaser, when it reaches the Cometopause region located at 1.35 × 105kmfrom the nucleus.


Author(s):  
A. V. Crewe

We have become accustomed to differentiating between the scanning microscope and the conventional transmission microscope according to the resolving power which the two instruments offer. The conventional microscope is capable of a point resolution of a few angstroms and line resolutions of periodic objects of about 1Å. On the other hand, the scanning microscope, in its normal form, is not ordinarily capable of a point resolution better than 100Å. Upon examining reasons for the 100Å limitation, it becomes clear that this is based more on tradition than reason, and in particular, it is a condition imposed upon the microscope by adherence to thermal sources of electrons.


Author(s):  
K.H. Westmacott

Life beyond 1MeV – like life after 40 – is not too different unless one takes advantage of past experience and is receptive to new opportunities. At first glance, the returns on performing electron microscopy at voltages greater than 1MeV diminish rather rapidly as the curves which describe the well-known advantages of HVEM often tend towards saturation. However, in a country with a significant HVEM capability, a good case can be made for investing in instruments with a range of maximum accelerating voltages. In this regard, the 1.5MeV KRATOS HVEM being installed in Berkeley will complement the other 650KeV, 1MeV, and 1.2MeV instruments currently operating in the U.S. One other consideration suggests that 1.5MeV is an optimum voltage machine – Its additional advantages may be purchased for not much more than a 1MeV instrument. On the other hand, the 3MeV HVEM's which seem to be operated at 2MeV maximum, are much more expensive.


2005 ◽  
Vol 19 (3) ◽  
pp. 129-132 ◽  
Author(s):  
Reimer Kornmann

Summary: My comment is basically restricted to the situation in which less-able students find themselves and refers only to literature in German. From this point of view I am basically able to confirm Marsh's results. It must, however, be said that with less-able pupils the opposite effect can be found: Levels of self-esteem in these pupils are raised, at least temporarily, by separate instruction, academic performance however drops; combined instruction, on the other hand, leads to improved academic performance, while levels of self-esteem drop. Apparently, the positive self-image of less-able pupils who receive separate instruction does not bring about the potential enhancement of academic performance one might expect from high-ability pupils receiving separate instruction. To resolve the dilemma, it is proposed that individual progress in learning be accentuated, and that comparisons with others be dispensed with. This fosters a self-image that can in equal measure be realistic and optimistic.


Author(s):  
Stefan Krause ◽  
Markus Appel

Abstract. Two experiments examined the influence of stories on recipients’ self-perceptions. Extending prior theory and research, our focus was on assimilation effects (i.e., changes in self-perception in line with a protagonist’s traits) as well as on contrast effects (i.e., changes in self-perception in contrast to a protagonist’s traits). In Experiment 1 ( N = 113), implicit and explicit conscientiousness were assessed after participants read a story about either a diligent or a negligent student. Moderation analyses showed that highly transported participants and participants with lower counterarguing scores assimilate the depicted traits of a story protagonist, as indicated by explicit, self-reported conscientiousness ratings. Participants, who were more critical toward a story (i.e., higher counterarguing) and with a lower degree of transportation, showed contrast effects. In Experiment 2 ( N = 103), we manipulated transportation and counterarguing, but we could not identify an effect on participants’ self-ascribed level of conscientiousness. A mini meta-analysis across both experiments revealed significant positive overall associations between transportation and counterarguing on the one hand and story-consistent self-reported conscientiousness on the other hand.


2019 ◽  
Vol 50 (2) ◽  
pp. 80-93
Author(s):  
Jort de Vreeze ◽  
Christina Matschke

Abstract. Not all group memberships are self-chosen. The current research examines whether assignments to non-preferred groups influence our relationship with the group and our preference for information about the ingroup. It was expected and found that, when people are assigned to non-preferred groups, they perceive the group as different to the self, experience negative emotions about the assignment and in turn disidentify with the group. On the other hand, when people are assigned to preferred groups, they perceive the group as similar to the self, experience positive emotions about the assignment and in turn identify with the group. Finally, disidentification increases a preference for negative information about the ingroup.


1961 ◽  
Vol 6 (6) ◽  
pp. 222-223
Author(s):  
Edwin G. Boring
Keyword(s):  

2005 ◽  
Vol 44 (03) ◽  
pp. 107-117
Author(s):  
R. G. Meyer ◽  
W. Herr ◽  
A. Helisch ◽  
P. Bartenstein ◽  
I. Buchmann

SummaryThe prognosis of patients with acute myeloid leukaemia (AML) has improved considerably by introduction of aggressive consolidation chemotherapy and haematopoietic stem cell transplantation (SCT). Nevertheless, only 20-30% of patients with AML achieve long-term diseasefree survival after SCT. The most common cause of treatment failure is relapse. Additionally, mortality rates are significantly increased by therapy-related causes such as toxicity of chemotherapy and complications of SCT. Including radioimmunotherapies in the treatment of AML and myelodyplastic syndrome (MDS) allows for the achievement of a pronounced antileukaemic effect for the reduction of relapse rates on the one hand. On the other hand, no increase of acute toxicity and later complications should be induced. These effects are important for the primary reduction of tumour cells as well as for the myeloablative conditioning before SCT.This paper provides a systematic and critical review of the currently used radionuclides and immunoconjugates for the treatment of AML and MDS and summarizes the literature on primary tumour cell reductive radioimmunotherapies on the one hand and conditioning radioimmunotherapies before SCT on the other hand.


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