Stability of a two-sublattice spin-glass model

We study the stability of the replica-symmetric solution of a two-sublattice infinite-range spin-glass model, which can describe the transition from antiferromagnetic to spin glass state. The eigenvalues associated with replica-symmetric perturbations are in general complex. The natural generalization of the usual stability condition is to require the real part of these eigenvalues to be positive. The necessary and sufficient conditions for all the roots of the secular equation to have positive real parts is given by the Hurwitz criterion. The generalized stability condition allows a consistent analysis of the phase diagram within the replica-symmetric approximation.Comment: 21 pages, 5 figure

Random-energy model in random fields

The random-energy model is studied in the presence of random fields. The problem is solved exactly both in the microcanonical ensemble, without recourse to the replica method, and in the canonical ensemble using the replica formalism. The phase diagrams for bimodal and Gaussian random fields are investigated in detail. In contrast to the Gaussian case, the bimodal random field may lead to a tricritical point and a first-order transition. An interesting feature of the phase diagram is the possibility of a first-order transition from paramagnetic to mixed phase.Comment: 18 pages, 5 figures (included

ASUHAN KEBIDANAN PRIMIPARA DENGAN POST SC ATAS INDIKASI PREEKLAMPSIA BERAT DI RUANG FLAMBOYAN RSUD PROF.DR.W. Z. JOHANNES KUPANG,TANGGAL 22 – 25 APRIL 2017.

Latar belakang: Resiko persalinan pada ibu dengan Pre-Eklampsia berat (PEB) sangatlah tinggi karena dapat mengancam keselamatan ibu dan janin, bahkan dapat menjadi eklampsia, maka perlu di lakukan upaya yang optimal untuk menurunkan kejadian tersebut pengobatan konservatif dan pengobatan aktif. Salah satu tindakan untuk mengatasi pre-Eklampsia berat adalah mengakhiri kehamilan dengan tindakan Sectio Caesarea jika dalam 24 jam tidak dapat di selesaikan dengan persalinan pervaginam (Syaifudin, 2002). Tujuan: Dapat menerapkan Asuhan Kebidanan pada Primipara post SC atas Indikasi PEB dengan menggunakan pendekatan manajemen varney, sehingga dapat memperluas, memperbanyak pengetahuan dan keterampilan mengenai asuhan kebidanan pada pasien dengan kegawatdaruratan obstetric di Ruang FlamboyanRSUD Prof. Dr. W.Z Johannes Kupang. Metode : Jenis penelitian ini bersifat deskriptif dengan menggunakan metode studi kasus manajemen kebidanan yang terdiri dari 7 langkah, yaitu : pengumpulan data dasar, interprestasi data dasar, Diagnosa potensial, Tindakan segera, menyusun rencana, melaksanakan secara menyeluruh asuhan kebidanan serta mengevaluasi keberhasilanya. Hasil: pemeriksaan di temukan tekanan darah 140/90 mmHg, protein uria (+), oedema pada kaki, hal ini menunjukan pasien telah mengalami preeklampsia berat. Penanganan terhadap ibu dengan preeklampsia berat adalah pasang infuse RL 500 ml dan drip MGSO4 40% 4 gram (IV) diberikan pelan-pelan selama ± 20 tetes/menit kemudian drip oxy 20 IU 20 tetes/ menitselama 6 jam.Setelah dievaluasi keadaan ibu baik,tidak terjadi hal-hal yang menjadi komplikasi dari tindakan tersebut. Kesimpulan:Dari penelitian yang dilakukan tidakditemukan kesenjangan antara teori dan praktek

PAIRWISE VELOCITIES OF GALAXIES IN THE CFA AND SSRS2 REDSHIFT SURVEYS

(compressed version) We combine the CfA Redshift Survey (CfA2) and the Southern Sky Redshift Survey (SSRS2) to estimate the pairwise velocity dispersion of galaxies \sig12 on a scale of \sim 1 \hmpc. Both surveys are complete to an apparent magnitude limit $B(0)=15.5$. Our sample includes 12,812 galaxies distributed in a volume 1.8 \times 10^6 \hmpc3. We conclude: 1) The pairwise velocity dispersion of galaxies in the combined CfA2+SSRS2 redshift survey is \sig12=540 \kms \pm 180 \kms. Both the estimate and the variance of \sig12 significantly exceed the canonical values \sig12=340 \pm40 measured by Davis \& Peebles (1983) using CfA1. 2) We derive the uncertainty in \sig12 from the variation among subsamples with volumes on the order of $7 \times 10^5$ \hmpc3. This variation is nearly an order of magnitude larger than the formal error, 36 \kms, derived using least-squares fits to the CfA2+SSRS2 correlation function. This variation among samples is consistent with the conclusions of Mo \etal (1993) for a number of smaller surveys and with the analysis of CfA1 by Zurek \etal (1994). 3) When we remove Abell clusters with $R\ge1$ from our sample, the pairwise velocity dispersion of the remaining galaxies drops to 295 \pm 99 \kms. Thus the dominant source of variance in \sig12 is the shot noise contributed by dense virialized systems. 4) The distribution of pairwise velocities is consistent with an isotropic exponential with velocity dispersion independent of scale.Comment: 61 pages uuencoded, compressed postscript in 5 pieces. Also available in one piece at http://www.dao.nrc.ca/DAO/SCIENCE/science.htm

Efficiency of low versus high airline pressure in stunning cattle with a pneumatically powered penetrating captive bolt gun

The efficiency of stunning cattle was assessed in 443 animals (304 pure Zebu and 139 crossbred cattle), being mainly mature bulls and cows. Cattle were stunned using a Jarvis pneumatically powered penetrating captive bolt gun operating with low (160–175 psi, N = 82) and high (190 psi, N = 363) airline pressure, which was within the manufactures specifications. Signs of brain function and the position of the shots on the heads were recorded after stunning. Velocity of the captive bolt and its physical parameters were calculated. Cattle shot with low pressures showed more rhythmic respiration (27 vs. 8%, P < 0.001), less tongue protrusion (4 vs. 12%, P = 0.03) and less masseter relaxation (22 vs. 48%, P < 0.001). There was an increased frequency of shots in the ideal position when cattle were shot with the low compared to high airline pressures (15.3 vs. 3.1%). Bolt velocity and its physical parameters were significantly (P < 0.01) higher when using high pressure. Airline pressures below 190 psi are inappropriate when shooting adult Zebu beef cattle with pneumatically powered penetrating captive bolt guns

Identifying the starting point of a spreading process in complex networks

When dealing with the dissemination of epidemics, one important question that can be asked is the location where the contamination began. In this paper, we analyze three spreading schemes and propose and validate an effective methodology for the identification of the source nodes. The method is based on the calculation of the centrality of the nodes on the sampled network, expressed here by degree, betweenness, closeness and eigenvector centrality. We show that the source node tends to have the highest measurement values. The potential of the methodology is illustrated with respect to three theoretical complex network models as well as a real-world network, the email network of the University Rovira i Virgili

Influência da adubação nitrogenada e potássica na podridão de colmo do milho por antracnose (Colletotrichum graminicola) em duas cultivares de milho

Trabalho apresentado no 42º Congresso Brasileiro de Fitopatologia, 2009, Rio de Janeiro, RJ

Importância da adubação nitrogenada e potássica na incidência de colmos podres por antracnose (Colletotrichum graminicola) e a sua relação com o peso de grãos em duas cultivares de milho.

Trabalho apresentado no 42º Congresso Brasileiro de Fitopatologia, 2009, Rio de Janeiro, RJ