Tunable Magnonic Thermal Hall Effect in Skyrmion Crystal Phases of Ferrimagnets

We theoretically study the thermal Hall effect by magnons in skyrmion crystal phases of ferrimagnets in the vicinity of the angular momentum compensation point (CP). To this end, we start by deriving the equation of motion for magnons in the background of an arbitrary equilibrium spin texture, which gives rise to the fictitious electromagnetic field for magnons. As the net spin density varies, the resultant equation of motion interpolates between the relativistic Klein-Gordon equation at CP and the nonrelativistic Schr{\"o}dinger-like equation away from it. In skyrmion crystal phases, the right- and the left-circularly polarized magnons with respect to the order parameter are shown to form the Landau levels separately within the uniform skyrmion-density approximation. For an experimental proposal, we predict that the magnonic thermal Hall conductivity changes its sign when the ferrimagnet is tuned across CP, providing a way to control heat flux in spin-caloritronic devices on the one hand and a feasible way to detect CP of ferrimagnets on the other hand.Comment: 6 pages, 3 figures, 2 pages of supplemental materia

Magnonic topological insulators in antiferromagnets

Extending the notion of symmetry protected topological phases to insulating antiferromagnets (AFs) described in terms of opposite magnetic dipole moments associated with the magnetic Neel order, we establish a bosonic counterpart of topological insulators in semiconductors. Making use of the Aharonov-Casher effect, induced by electric field gradients, we propose a magnonic analog of the quantum spin Hall effect (magnonic QSHE) for edge states that carry helical magnons. We show that such up and down magnons form the same Landau levels and perform cyclotron motion with the same frequency but propagate in opposite direction. The insulating AF becomes characterized by a topological Z(2) number consisting of the Chern integer associated with each helical magnon edge state. Focusing on the topological Hall phase for magnons, we study bulk magnon effects such as magnonic spin, thermal, Nernst, and Ettinghausen effects, as well as the thermomagnetic properties of helical magnon transport both in topologically trivial and nontrivial bulk AFs and establish the magnonic Wiedemann-Franz law. We show that our predictions are within experimental reach with current device and measurement techniques

Pengaruh Kepuasan Kerja, Motivasi Kerja Dan Self Esteem Terhadap Kinerja Karyawan ( Studi Kasus Pada Koperasi Simpan Pinjam Syariah ( KSPS ) BMT Kodya Salatiga)

Penelitian ini bertujuan untuk mengetahui pengaruh kepuasan kerja, motivasi kerja, dan self esteem terhadap kinerja karyawan Study kasus pada Koperasi Simpan Pinjam Syaria’ah (KSPS) BMT Kodya Salatiga. Penelitian ini menggunakan metode kuantitatif dengan menggunakan data primer yang diperoleh dari kuesioner. Populasi dalam penelitian ini adalah karyawan tetap bagian kantor (staff office) dan marketing yang bekerja di Koperasi Simpan Pinjam Syaria’ah (KSPS) BMT Kodya Salatiga. Jumlah sampel dalam penelitian ini sebanyak 42 responden. Metode pengumpulan sampel menggunakan teknik convenience sampling. Alat analisis yang digunakan meliputi uji validitas dan uji reliabilitas, uji normalitas, uji multikolinieritas, uji heteroskedastisitas, uji regresi linier berganda, uji F, uji koefisien determinasi (AdjR2), dan uji t. Berdasarkan hasil analisis data dapat disimpulkan bahwa variabel kepuasan kerja berpengaruh signifikan terhadap kinerja karyawan, hal ini ditunjukkan oleh nilai p sebesar 0,005 sehingga H1 diterima dengan taraf signifikansi (p < 0,05). Sedangkan variabel motivasi kerja tidak berpengaruh signifikan terhadap kinerja karyawan , hal ini ditunjukkan oleh nilai p sebesar 0,816 sehingga H2 ditolak dengan taraf signifikansi (p > 0,05). Begitupula pada variabel self esteem berpengaruh signifikan terhadap kinerja karyawan, hal ini ditunjukkan oleh nilai p sebesar 0,327 sehingga H3 ditolak dengan taraf signifikansi (p > 0,05)

Perinatal circumstances and risk of offspring suicide. Birth cohort study.

BACKGROUND: A higher risk of suicide has been associated with low birth weight in one study, but not yet replicated. Higher birth order has been associated with self-harm, but not with suicide. AIMS: To examine the relationship between perinatal circumstances and subsequent young adult suicide in Scotland. METHOD: Using linked data from the Scottish Morbidity Record and Scottish death records, a birth cohort of 1061830 people was followed-up for a mean of 25.1 years. Data were analysed using Cox regression. RESULTS: Higher maternal parity, younger maternal age (<25 years), non-professional parental occupations and low birth weight (<2500 g) were independently associated with higher suicide risk of offspring as young adults. There was no independent association with gestational age. CONCLUSIONS: Our findings provide support for the influence of maternal circumstance and foetal experience on subsequent mental health

PENGARUH BRAND IMAGE DAN HARGA TERHADAP LOYALITAS PELANGGAN PADA DISTRO HYB SUPPLY

ABSTRAK Manajemen pemasaran merupakan seni dan ilmu untuk memilih pasar sasaran dan meraih, mempertahankan, serta menumbuhkan pelanggan dengan menciptakan, menghantarkan dan, mengkomunikasikan niai pelanggan yang unggul. Penelitian ini bertujuan untuk mengetahui seberapa besar pengaruh brand image dan harga terhadap loyalitas pelanggan pada distro Hyb Supply Bandung baik secara parsial maupun simultan. Metode penelitian yang digunakan adalah deskriptif dan verifikatif dengan jumlah sample 100 responde n. Teknik pengumpulan data yang digunakan adalah observasi, wawancara, dan menyebarkan kuisioner. Metode analisis data yang digunakan adalah regresi linier berganda, korelasi ganda dan koefisien determinasi, dan uji hipotesis. Hasil penelitian menunjukkan besar pengaruh brand image dan harga terhadap loyalitas pelanggan pada distro Hyb Supply Bandung dapat dikatakan cukup baik. Brand image memberikan pengaruh yang lebih kecil pada loyalitas pelanggan dibandingkan dengan harga terhadap loyalita pelanggan. Kata Kunci : Brand Image, Harga dan Loyalitas Pelangga

Asymmetric triplex metallohelices with high and selective activity against cancer cells

Small cationic amphiphilic α-helical peptides are emerging as agents for the treatment of cancer and infection, but they are costly and display unfavourable pharmacokinetics. Helical coordination complexes may offer a three-dimensional scaffold for the synthesis of mimetic architectures. However, the high symmetry and modest functionality of current systems offer little scope to tailor the structure to interact with specific biomolecular targets, or to create libraries for phenotypic screens. Here, we report the highly stereoselective asymmetric self-assembly of very stable, functionalized metallohelices. Their anti-parallel head-to-head-to-tail ‘triplex’ strand arrangement creates an amphipathic functional topology akin to that of the active sub-units of, for example, host-defence peptides and ​p53. The metallohelices display high, structure-dependent toxicity to the human colon carcinoma cell-line HCT116 ​p53++, causing dramatic changes in the cell cycle without DNA damage. They have lower toxicity to human breast adenocarcinoma cells (MDA-MB-468) and, most remarkably, they show no significant toxicity to the bacteria methicillin-resistant Staphylococcus aureus and Escherichia coli. At a glanc

The characteristics of cognitive neuroscience tests in a schizophrenia cognition clinical trial: Psychometric properties and correlations with standard measures.

In comparison to batteries of standard neuropsychological tests, cognitive neuroscience tests may offer a more specific assessment of discrete neurobiological processes that may be aberrant in schizophrenia. However, more information regarding psychometric properties and correlations with standard neuropsychological tests and functional measures is warranted to establish their validity as treatment outcome measures. The N-back and AX-Continuous Performance Task (AX-CPT) are two promising cognitive neuroscience tests designed to measure specific components of working memory and contextual processing respectively. In the current study, we report the psychometric properties of multiple outcome measures from these two tests as well as their correlations with standard neuropsychological measures and functional capacity measures. The results suggest that while the AX-CPT and N-back display favorable psychometric properties, they do not exhibit greater sensitivity or specificity with functional measures than standard neurocognitive tests

Hydroxymethylglutaryl-CoA reductase inhibition with simvastatin in acute lung injury to reduce pulmonary dysfunction (HARP-2) trial : study protocol for a randomized controlled trial

Acute lung injury (ALI) is a common devastating clinical syndrome characterized by life-threatening respiratory failure requiring mechanical ventilation and multiple organ failure. There are in vitro, animal studies and pre-clinical data suggesting that statins may be beneficial in ALI. The Hydroxymethylglutaryl-CoA reductase inhibition with simvastatin in Acute lung injury to Reduce Pulmonary dysfunction (HARP-2) trial is a multicenter, prospective, randomized, allocation concealed, double-blind, placebo-controlled clinical trial which aims to test the hypothesis that treatment with simvastatin will improve clinical outcomes in patients with ALI