The Decay Lifetime of Polarized Fermions in Flight

Based on the parity violation in Standard model, we study the dependence of lifetime on the helicity of an initial-state fermion in weak interactions. It is pointed out that if the initial fermions in the decays are longitudinally polarized, then the decay lifetime of left-handed polarized fermions is different from that of right-handed polarized fermions in flight with a same velocity in a same inertial system.Comment: 7 pages, Late

An optimal gap theorem

By solving the Cauchy problem for the Hodge-Laplace heat equation for $d$-closed, positive $(1, 1)$-forms, we prove an optimal gap theorem for K\"ahler manifolds with nonnegative bisectional curvature which asserts that the manifold is flat if the average of the scalar curvature over balls of radius $r$ centered at any fixed point $o$ is a function of $o(r^{-2})$. Furthermore via a relative monotonicity estimate we obtain a stronger statement, namely a `positive mass' type result, asserting that if $(M, g)$ is not flat, then $\liminf_{r\to \infty} \frac{r^2}{V_o(r)}\int_{B_o(r)}\mathcal{S}(y)\, d\mu(y)>0$ for any $o\in M$

Real-time standard scan plane detection and localisation in fetal ultrasound using fully convolutional neural networks

Fetal mid-pregnancy scans are typically carried out according to fixed protocols. Accurate detection of abnormalities and correct biometric measurements hinge on the correct acquisition of clearly defined standard scan planes. Locating these standard planes requires a high level of expertise. However, there is a worldwide shortage of expert sonographers. In this paper, we consider a fully automated system based on convolutional neural networks which can detect twelve standard scan planes as defined by the UK fetal abnormality screening programme. The network design allows real-time inference and can be naturally extended to provide an approximate localisation of the fetal anatomy in the image. Such a framework can be used to automate or assist with scan plane selection, or for the retrospective retrieval of scan planes from recorded videos. The method is evaluated on a large database of 1003 volunteer mid-pregnancy scans. We show that standard planes acquired in a clinical scenario are robustly detected with a precision and recall of 69 % and 80 %, which is superior to the current state-of-the-art. Furthermore, we show that it can retrospectively retrieve correct scan planes with an accuracy of 71 % for cardiac views and 81 % for non-cardiac views

Respon Kekebalan Humoral Mencit Balb/c yang Divaksinasi dengan Vaksin Limpa dan Vaksin Kultur Penyakit Jembrana terhadap Protein Virus Jembrana

Sapi Bali adalah salah satu aset nasional Indonesia yang harus dilestarikan karena mempunyai keuntungan ekonomi. Tetapi sapi Bali mempunyai beberapa kelemahan penyakit khususnya penyakit Jembrana yang disebabkan oleh virus penyakit Jembrana (JDV). Pencegahan terhadap penyakit Jembrana telah dilakukan dengan vaksinasi. Vaksin yang terbukti dapat menurunkan tingkat kematian sapi Bali terserang JDV adalah vaksin limpa. Jenis vaksin ini hanya mampu menginduksi kekebalan dengan perlindungan 70%. Proteksi ini dapat ditingkatkan jika jumlah virus yang digunakan dalam vaksin meningkat. Tekhnik kultur in vitro adalah salah satu metode meningkatkan jumlah virus penyakit Jembrana, dan selanjutnya dibuat vaksin kultur. Hasil penelitian menunjukkan bahwa sel limfosit sapi Bali terinfeksi JDV adalah 9,5% pada limpa dan 57,43% pada sel kultur. Uji westernimmunoblotting sel limfosit sapi Bali dari darah tepi dan limpa terinfeksi JDV menggunakan antibodi monoklonal (AbMo) anti Ca, terdeteksi protein dengan berat molekul 26 kDa, 42 kDa dan 51 kDa. Pada medium kultur PBMC dan endapan plasma sapi Bali terinfeksi JDV, teridentifikasi protein dengan berat molekul 16 kDa an 26 kDa menggunakan AbMo, dan teridentifikasi protein dengan berat molekul 16 kDa; 21,5 kDa. 26 kDa; 29,7 kDa; 40 kDa dan 50 kDa menggunakan AbPo. Uji Elisa didapatkan nilai absorban antibodi mencit balb/c yang divaksinasi dengan vaksin kultur penyakit Jembrana lebih tinggi yaitu sebesar 0,3089 dibandingkan vaksin limpa yaitu sebesar 0,177 dengan p<0,05. Nilai absorban antibodi mencit balb/c terhadap antigen Ca, SU dan tat, memperlihatkan nilai absorban terhadap antigen SU berbeda sangat signifikan dibandingkan dengan antigen Ca dan antigen tat (p<0,01). Antigen Ca berbeda signifikan terhadap antigen tat (p<0,05)

Observation of a pressure-induced transition from interlayer ferromagnetism to intralayer antiferromagnetism in Sr4Ru3O10

Sr4Ru3O10 is a Ruddlesden-Popper compound with triple Ru-O perovskite layers separated by Sr-O alkali layers. This compound presents a rare coexistence of interlayer (c-axis) ferromagnetism and intralayer (basal-plane) metamagnetism at ambient pressure. Here we report the observation of pressure-induced, intralayer itinerant antiferromagnetism arising from the interlayer ferromagnetism. The application of modest hydrostatic pressure generates an anisotropy that causes a flattening and a tilting of RuO6 octahedra. All magnetic and transport results from this study indicate these lattice distortions diminish the c-axis ferromagnetism and basal-plane metamagnetism, and induce a basal-plane antiferromagnetic state. The unusually large magnetoelastic coupling and pressure tunability of Sr4Ru3O10 makes it a unique model system for studies of itinerant magnetism.Comment: 6 figure