Dephasing-enabled triplet Andreev conductance

We study the conductance of normal-superconducting quantum dots with strong spin-orbit scattering, coupled to a source reservoir using a single-mode spin-filtering quantum point contact. The choice of the system is guided by the aim to study triplet Andreev reflection without relying on half metallic materials with specific interface properties. Focusing on the zero temperature, zero-bias regime, we show how dephasing due to the presence of a voltage probe enables the conductance, which vanishes in the quantum limit, to take nonzero values. Concentrating on chaotic quantum dots, we obtain the full distribution of the conductance as a function of the dephasing rate. As dephasing gradually lifts the conductance from zero, the dependence of the conductance fluctuations on the dephasing rate is nonmonotonic. This is in contrast to chaotic quantum dots in usual transport situations, where dephasing monotonically suppresses the conductance fluctuations.Comment: 6 pages, 3 figure

THE MORPHOLOGY OF PATHOGENIC FUNGI AS THE CAUSE OF ROTTEN CACAO (THEOBROMA CACAO L.) FRUITS IN TUMBA VILLAGE

The purpose of this qualitative descriptive study was to find out the types of pathogenic fungi that caused rotten cacao fruits based on morphological characteristics in Tumba village. Fungi isolation was performed by employing the moist chamber method with the PDA medium. Moreover, the identification of pathogenic fungal isolates followed the morphological characteristics mentioned earlier. The results showed that four fungal isolates contributed to the rotting of cacao fruits in the site area. Fungal isolate Tumba 1 (T1) had morphological characteristics of a white colony with smooth surface, and oval sporangium with a bulge on its tip; fungal isolate Tumba 2 (T2) consisted of morphological characteristics of a white colony with a pink circle in the middle, and having a sickle-shaped and oval macroconidia; fungal isolate Tumba 3 (T3) comprised morphological characteristics of a dark black colony with irregular shape, uneven edge, and having a long conidiophore with a big conidial head; fungal isolate Tumba 4 (T4) had morphological characteristics of a black colony with a white circle in the middle, uneven edge, and having a tube-shaped conidium. As based on the morphological characteristics, it was assumed that the four fungal isolates causing the rotten cacao fruit were similar to the types of fungi, i.e., Phytopthora palmivora, Fusarium sp, Aspergilus niger, and Gloeosprorium sp

Kadar Kalium Serum Pada Latihan Fisik Intensitas Sedang Mahasiswa Fakultas Kedokteran Universitas Sam Ratulangi

: Excessive body heat while doing physical exercise will be excreted by sweating. Potassium is one of the electrolyte compounds incorporated and washed away together with sweat. In turn, the excessive lost of potassium in sweat can decrease the concentration of extracellular potassium level. Physical exercise can also lead to an increase in serum potassium concentration. The present study was aimed to determine the differences of potassium level before and after physical exercise at moderate intensity at students year 2010 Faculty of Medicine Sam Ratulangi University. Thirty students (27 men and 3 women) were involved in the present pre-experimental study designed with pretest-posttest. Samples were colected using purposive sampling method and analyzed further using wilcoxon test. Data was collected by determine the serum potassium levels before and after moderate intensity physical exercise. Exercise is done in the form of fast walking on a treadmill to maintain heart rate target 64-76 % of maximum heart rate (200 - age) for 30 minutes. The result showed that the average of serum potassium levels before moderate intensity exercise was 4,253±0,3683 mEq/L, and the average of serum potassium levels after moderate intensity exercise was 4,363±0,3908 mEq/L. Wilcoxon test significance values ​​in this study were p=0.110 (p>0,05). It can be concluded that there was no difference of potassium level before and after physical exercise at moderate intensity at students year 2010 Faculty of Medicine Sam Ratulangi University

Fractal Image Coding as Projections Onto Convex Sets

Abstract. We show how fractal image coding can be viewed and gen-eralized in terms of the method of projections onto convex sets (POCS). In this approach, the fractal code denes a set of spatial domain sim-ilarity constraints. We also show how such a reformulation in terms of POCS allows additional contraints to be imposed during fractal image decoding. Two applications are presented: image construction with an incomplete fractal code and image denoising.

Relative asymptotics for orthogonal matrix polynomials with respect to a perturbed matrix measure on the unit circle

19 pages, no figures.-- MSC2000 codes: 42C05, 47A56.MR#: MR1970413 (2004b:42058)Zbl#: Zbl 1047.42021Given a positive definite matrix measure Ω supported on the unit circle T, then main purpose of this paper is to study the asymptotic behavior of L_n(\tilde{\Omega}) L_n(\Omega) -1} and \Phi_n(z, \tilde{\Omega}) \Phi_n(z, \tilde{\Omega}) -1} where $\tilde{\Omega}(z) = \Omega(z) + M \delta ( z - w)$, $1$, M is a positive definite matrix and δ is the Dirac matrix measure. Here, Ln(·) means the leading coefficient of the orthonormal matrix polynomials Φn(z; •).Finally, we deduce the asymptotic behavior of $\Phi_n(omega, \tilde{\Omega}) \Phi_n(omega, \Omega)$ in the case when M=I.The work of the second author was supported by Dirección General de Enseñanza Superior (DGES) of Spain under grant PB96-0120-C03-01 and INTAS Project INTAS93-0219 Ext.Publicad

A basic optimization problem in linear systems

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/48017/1/224_2005_Article_BF01691464.pd