Kebiasaan Makanan dan Hubungan Panjang Berat Ikan Julung - Julung (Dermogenys SP.) di Sungai Alur Hitam Kecamatan Bendahara Kabupaten Aceh Tamiang

The objectives of the present study were to evaluate the food habit and lenght weight relationships of Dermogenys sp. The study was conducted from April to June 2015. The fish were sampled in Alur Hitam River, Bendahara Subdistrict, Aceh Tamiang using hand nets. The sampled fishes were preserved in 10% formalin for further analysis. A total of 136 fish samples were catched during the study. The stomach analysis showed that Formica sp. was predominant food item for Dermogenys sp. (52.53%), followed by Dolichoderus sp. (38.38 %), indicate that Formica and Dolichoderus are the primary foods for Dermogenys sp. Therefore, Dermogenys is classified as an insectivorous food habit. The length of alimentary tract ranged between 1.54 cm to 1.67 cm. The length - weight relationships and condition factor showed that the average b value was 2.753 displayed an allometric negatif growth pattern, while the condition factor value was 103.10 indicate that the water condition in term of prey and predator availability are in balance condition.Penelitian tentang kebiasaan makan dan hubungan panjang berat ikan Dermogenys sp. telah dilakukan pada bulan April-Juni 2015. Penelitian ini bertujuan untuk mengetahui kebiasaan makan dan hubungan panjang berat dan faktor kondisi ikan Dermogenys sp.. Metode yang digunakan pada penelitian ini adalah metode survey, sampel ikan di tangkap di Sungai Alur Hitam Kecamatan Bendahara, Kabupaten Aceh Tamiang dengan menggunaan serok dan langsung diwetkan dengan larutan formalin 10%. Selama penelitian tertangkap 136 ekor ikan Dermogenys sp.. Hasil analisis kebiasaan isi lambung diperoleh semut merah Formica sp. ditemukan pada 71 ekor sampel ikan (52,53%) dan diikuti oleh semut hitam Dolichoderus sp. pada 52 ekor sampel (38,38%) dan kedua jenis makanan tersebut tergolong kedalam makanan utama dan makanan yang tidak teridentifikasi terdapat pada 19 ekor sampel ikan (14,29%). Panjang rerata usus ikan Dermogenys ±1,54-1,67 cm, sehingga dengan demikian ikan Dermogenys sp. dapat digolongkan sebagai ikan insektifora (pemakan insekta). Hasil analisis hubungan panjang-berat diperoleh nilai koefisien b= 2,753 menunjukkan pola pertumbuhan alometrik negative dan nilai faktor kondisi 103,10 menunjukkan kondisi perairan masih tergolong baik atau stabil

Comment on "Evidence for the Droplet/Scaling Picture of Spin Glasses"

In a recent letter Moore et al. claim to exhibit evidence for a non-mean-field behavior of the $3d$ Ising spin glass. We show that their claim is insubstantial, and by analyzing in detail the behavior of the Migdal-Kadanoff approximation (MKA) as compared to the behavior of the Edwards-Anderson (EA) spin glass we find further evidence of a mean-field like behavior of the $3d$ spin glass.Comment: 1 page comment including one postscript figur

HySIA: Tool for Simulating and Monitoring Hybrid Automata Based on Interval Analysis

We present HySIA: a reliable runtime verification tool for nonlinear hybrid automata (HA) and signal temporal logic (STL) properties. HySIA simulates an HA with interval analysis techniques so that a trajectory is enclosed sharply within a set of intervals. Then, HySIA computes whether the simulated trajectory satisfies a given STL property; the computation is performed again with interval analysis to achieve reliability. Simulation and verification using HySIA are demonstrated through several example HA and STL formulas.Comment: Appeared in RV'17; the final publication is available at Springe

The mean field infinite range p=3 spin glass: equilibrium landscape and correlation time scales

We investigate numerically the dynamical behavior of the mean field 3-spin spin glass model: we study equilibrium dynamics, and compute equilibrium time scales as a function of the system size V. We find that for increasing volumes the time scales $\tau$ increase like $\ln \tau \propto V$. We also present an accurate study of the equilibrium static properties of the system.Comment: 6 pages, 9 figure

Laser and microwave spectroscopy of even-parity Rydberg states of neutral ytterbium and Multichannel Quantum Defect Theory analysis

New measurements of high-lying even parity $6sns\, {}^1 \! S_0$ and $6snd\,{}^{3,1}\!D_2$ levels of neutral $^{174}$Yb are presented in this paper. Spectroscopy is performed by a two-step laser excitation from the ground state $4f^{14}6s^2 \, {}^1 \! S_0$, and the Rydberg levels are detected by using the field ionization method. Additional two-photon microwave spectroscopy is used to improve the relative energy accuracy where possible. The spectroscopic measurements are complemented by a multichannel quantum defect theory (MQDT) analysis for the J=0 and the two-coupled J=2 even parity series. We compare our results with the previous analysis of Aymar {\it{et al}} \cite{Aymar_1980} and analyze the observed differences. From the new MQDT models, a revised value for the first ionization limit $I_{6s}=50443.07041(25)$ cm$^{-1}$ is proposed.Comment: 15 pages, 3 figure

Overlap Among States at Different Temperatures in the SK Model

We discuss the issue of temperature chaos in the Sherrington--Kirkpatrick spin glass mean field model. We numerically compute probability distributions of the overlap among (equilibrium) configurations at two different values of the temperature, both in the spin glass phase. The situation on our medium size systems is clearly non-chaotic, but a weak form of chaos could be emerging on very large lattices.Comment: 4 pages in aps format including 8 ps figures. Small change

Nonspecific transfer as a function of change in training method in a paired-associate learning task.

Dept. of Psychology. Paper copy at Leddy Library: Theses & Major Papers - Basement, West Bldg. / Call Number: Thesis1976 .Z94. Source: Masters Abstracts International, Volume: 40-07, page: . Thesis (M.A.)--University of Windsor (Canada), 1976