478 research outputs found

    Vom Willen bei Schopenhauer und Nietzsche

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    Finite-temperature phase diagram of two-component bosons in a cubic optical lattice: Three-dimensional t-J model of hard-core bosons

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    We study the three-dimensional bosonic t-J model, i.e., the t-J model of "bosonic electrons", at finite temperatures. This model describes the s=12s={1 \over 2} Heisenberg spin model with the anisotropic exchange coupling J=αJzJ_{\bot}=-\alpha J_z and doped {\it bosonic} holes, which is an effective system of the Bose-Hubbard model with strong repulsions. The bosonic "electron" operator BrσB_{r\sigma} at the site rr with a two-component (pseudo-)spin σ(=1,2)\sigma (=1,2) is treated as a hard-core boson operator, and represented by a composite of two slave particles; a "spinon" described by a Schwinger boson (CP1^1 boson) zrσz_{r\sigma} and a "holon" described by a hard-core-boson field ϕr\phi_r as Brσ=ϕrzrσB_{r\sigma}=\phi^\dag_r z_{r\sigma}. By means of Monte Carlo simulations, we study its finite-temperature phase structure including the α\alpha dependence, the possible phenomena like appearance of checkerboard long-range order, super-counterflow, superfluid, and phase separation, etc. The obtained results may be taken as predictions about experiments of two-component cold bosonic atoms in the cubic optical lattice.Comment: 8 pages, 14 figures, Size of figures has been adjuste

    Comparative Chemotherapeutic Efficacy in Non-small Cell Lung Cancer Patients with Postoperative Recurrence and Stage IV Disease

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    BackgroundWhether chemotherapy would be equally effective in non-small cell lung cancer patients with stage IV disease (group A) and postoperative recurrence (group B) remains unclear.Patients and MethodsIn a total of 642 non-small cell lung cancer patients with distant metastases treated by chemotherapy, the baseline patient characteristics, responses to chemotherapy and survival were compared between group A (n = 480) and group B (n = 162).ResultsAdenocarcinoma was the predominant histologic type, accounting for 78% of the patients in group A and 90% of the patients in group B (p < 0.001). Bone and brain metastases were more common in group A (p = 0.034 and p = 0.014, respectively), although pulmonary metastases were more common in group B (p < 0.001). The chemotherapy regimens used for the treatment did not differ between groups A and B. The response rates in group A and group B were 32 and 33%, respectively (p = 0.65). In contrast, the median progression-free survival (5.5 versus 4.2 months, p = 0.0065) and overall survival (21.3 versus 13.3 months, p < 0.001) were better in group B than in group A.ConclusionSurvival was superior in patients with postoperative recurrence than in those with stage IV disease, although the two groups showed comparable responses to chemotherapy

    A Sphere Where \u27Gelassenheit\u27 Comesinto Question

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    The term \u27Gelassenheit\u27 (releasement, presence of mind) was discussed by Eckhart, Schopenhauer, and Heidegger as a term with an important thought and as something non-willful. In this paper, it is intended that the will and the \u27Gelessenheit\u27 are regarded as a single problem, and the sphere of problems is clarified from the viewpoint of freedom. Freedom, in the modem philosophy, especially by Kant, is defined as spontaneousness, and embodied as self-legislation and autonomy of the practical reason. In this case, the freedom at the same time has an aspect of self-binding. But from the viewpoint of the freedom 9-iscussed by Eckhart, that is the freedom not hindered by anything, it is not a real freedom, and can be suggested as a problem with the modern freedom. Heidegger regrasps this problem as non-groundness that the freedom for the ground has. So the sphere of the will is surrounded by this nothingness, and as far as it is within the will, \u27Gelassenheit\u27 will be opened up as a sphere of problems looking out through nothingness

    A Sphere Where \u27Gelassenheit\u27 Comes into Question (Ⅱ)

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    In my previous paper, the sphere where \u27Gelassenheit\u27 comes into question was discussed from the viewpoint of freedom. In this paper, it is discussed from the viewpoint of nothingness, especially as discussed by Schopenhauer, and negation of will. Furthermore, the subject of the discussion is the mode of thought on nothingness, rather than the nothingness itself. It is intended to lead to how the \u27Gelassenheit\u27 should be. First, it is made clear that Schopenhauer critically studied Kant\u27s classification of \u27nihil privativum\u27 and \u27nihil negativum\u27 and, by doing so, subsumed them as relative nothingness, and also that he thought about relative nothingness as negation of cognition, not as nothingness of the object (emptiness). At the same time, it is suggested that his negation of will is positioned in the activity where the will itself has the self-recognition through the world as the idea. These two points further lead to the following conclusion in this paper. That is, Schopenhauer\u27s mode of thought on nothingness is not the same as that of Kant in which nothingness is regarded as empty, or as that of the German Idealism which leads to the Absolute. Rather, Schopenhauer thought about the \u27Gelassenheit\u27 of the sage while remaining in the position of the relativeness of cognition through discussing the objectification and negation of will in itself

    Robotic Control by Teleoperation and Delay Time Issues Using the Internet

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    Internet usage has become an essential part of our daily lives, it has become universal. The aim of this research is to consider existing Internet-based networks with regard to their support for the remote operation of robotic technology, in particular, looking at transmission speed and delay time as it relates to teleoperation. Currently dedicated connections are typically used when a high Quality of Service (QoS) is required for mission critical services or safety-critical systems (SCS), however such connections are very expensive to set up and maintain. Therefore, this study focuses on modifying existing internet networks in a manner to provide a better QoS with little additional cost. Using a number of microcontrollers, computers, and routers, two different protocols were used to control a robotic device remotely. Use of the Point-to-Point Tunnelling Protocol (PPTP) used for implementing a Virtual Private Network (VPN) was found to provide higher average transmission speeds compared to the using a Uniform Resource Locator (URL) which is a regular internet connection
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