4,747 research outputs found

    Note on paraconsistency and reasoning about fractions

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    We apply a paraconsistent logic to reason about fractions.Comment: 6 page

    Straight-line instruction sequence completeness for total calculation on cancellation meadows

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    A combination of program algebra with the theory of meadows is designed leading to a theory of computation in algebraic structures which use in addition to a zero test and copying instructions the instruction set {x0,x1,xx,xx1,xx+y,xxy}\{x \Leftarrow 0, x \Leftarrow 1, x\Leftarrow -x, x\Leftarrow x^{-1}, x\Leftarrow x+y, x\Leftarrow x\cdot y\}. It is proven that total functions on cancellation meadows can be computed by straight-line programs using at most 5 auxiliary variables. A similar result is obtained for signed meadows.Comment: 24 page

    Equations for formally real meadows

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    We consider the signatures Σm=(0,1,,+,, 1)\Sigma_m=(0,1,-,+, \cdot, \ ^{-1}) of meadows and (Σm,s)(\Sigma_m, {\mathbf s}) of signed meadows. We give two complete axiomatizations of the equational theories of the real numbers with respect to these signatures. In the first case, we extend the axiomatization of zero-totalized fields by a single axiom scheme expressing formal realness; the second axiomatization presupposes an ordering. We apply these completeness results in order to obtain complete axiomatizations of the complex numbers.Comment: 24 pages, 14 tables, revised, new Theorem 3.

    Automated data acquisition and reduction system for torsional braid analyzer

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    Automated Data Acquisition and Reduction System (ADAR) evaluates damping coefficient and relative rigidity by storing four successive peaks of waveform and time period between two successive peaks. Damping coefficient and relative rigidity are then calculated and plotted against temperature or time in real time

    TRUST DAN SELF-DISCLOSURE PADA REMAJA PENGGUNA INSTAGRAM

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    Media sosial Instagram mendorong para remaja untuk mengeksplor kehidupan pribadi penggunanya. Self-disclosure yang tinggi pada remaja pengguna Instagram, membutuhkan trust yang besar pada Instagram tersebut untuk menjaga keamanan dan kenyamanan dalam bersosial media. Penelitian ini bertujuan untuk mengetahui hubungan antara trust dan self-disclosure pada remaja pengguna Instagram. Metode yang digunakan dalam penelitian ini adalah metode kuantitatif dengan teknik purposive sampling. Sampel pada penelitian ini adalah remaja yang telah menggunakan Instagram selama minimal 1 tahun dan berusia 14-22 tahun dengan jumlah sampel 97 orang. Alat ukur dalam penelitian ini menggunakan skala trust dan skala self-disclosure. Nilai koefisien korelasi sebesar 0.193 dan nilai signifikansi sebesar 0.029 (p < .05). Hal ini menunjukan bahwa adanya hubungan positif antara trust dan self-disclosure pada remaja pengguna Instagram yang berati semakin tinggi trust maka semakin tinggi pula self-disclosure

    Mitochondrial and chloroplast stress responses are modulated in distinct touch and chemical inhibition phases

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    Previous studies have identified a range of transcription factors that modulate retrograde regulation of mitochondrial and chloroplast functions in Arabidopsis (Arabidopsis thaliana). However, the relative importance of these regulators and whether they act downstream of separate or overlapping signaling cascades is still unclear. Here, we demonstrate that multiple stress-related signaling pathways, with distinct kinetic signatures, converge on overlapping gene sets involved in energy organelle function. The transcription factor ANAC017 is almost solely responsible for transcript induction of marker genes around 3 to 6 h after chemical inhibition of organelle function and is a key regulator of mitochondrial and specific types of chloroplast retrograde signaling. However, an independent and highly transient gene expression phase, initiated within 10 to 30 min after treatment, also targets energy organelle functions, and is related to touch and wounding responses. Metabolite analysis demonstrates that this early response is concurrent with rapid changes in tricarboxylic acid cycle intermediates and large changes in transcript abundance of genes encoding mitochondrial dicarboxylate carrier proteins. It was further demonstrated that transcription factors AtWRKY15 and AtWRKY40 have repressive regulatory roles in this touch-responsive gene expression. Together, our results show that several regulatory systems can independently affect energy organelle function in response to stress, providing different means to exert operational control
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