Strategies to link tiny neutrino masses with huge missing mass of the Universe

With the start of the LHC, interest in electroweak scale models for the neutrino mass has grown. In this letter, we review two specific models that simultaneously explain neutrino masses and provide a suitable DM candidate. We discuss the implications of these models for various observations and experiments including the LHC, Lepton Flavor Violating (LFV) rare decays, direct and indirect dark matter searches and Kaon decay.Comment: 17 pages, one diagram, talk given at International Conference on Flavor Physics in the LHC era in Singapor

R-parity violation assisted thermal leptogenesis in the seesaw mechanism

Successful leptogenesis within the simplest type I supersymmetric seesaw mechanism requires the lightest of the three right-handed neutrino supermultiplets to be heavier than $\sim10^9$ GeV. Thermal production of such (s)neutrinos requires very high reheating temperatures which result in an overproduction of gravitinos with catastrophic consequences for the evolution of the universe. In this letter, we let R-parity be violated through a $\lambda_i \hat{N}_i \hat{H}_u \hat{H}_d$ term in the superpotential, where $\hat{N}_i$ are right-handed neutrino supermultiplets. We show that in the presence of this term, the produced lepton-antilepton asymmetry can be enhanced. As a result, even for $\hat{N}_1$ masses as low as $10^6$ GeV or less, we can obtain the observed baryon asymmetry of the universe without gravitino overproduction.Comment: 4 pages, 1 figure; v2: minor changes, references adde

SiC and ZrO2 Weigh Percentage Effects on Microstructure of Al Based Matrix Composite Fabricated by Spark Plasma Sintering Method

SiC and ZrO2 particle are succesfully reaction synthesized from powder of Al, ZrO2 and SiC using spark plasma sintering method. The XRD of sintered composite and microstructure of the aas-sintered products. With the ZrO2 content increasing, the grains are remarkably refined and the and the ZrO2 and nano SiC particles are dispersing more uniformly in Al matrix, forming a homogeneous structure with the least porosity

Strategi Pemberdayaan Guru dalam Peningkatan Pengetahuan, Sikap dan Tindakan terhadap Perilaku Hidup Bersih dan Sehat pada Murid Sdn 06 Poasia Kota Kendari Tahun 2016

Sekolah menempati kedudukan strategis dalam upaya promosi kesehatan, karena sebagian besar anakanakusia 5-19 tahun terpajan dengan lembaga pendidikan dalam jangka waktu yang lama dan sekolahmendukung pertumbuhan dan perkembangan alamiah seorang anak. Pada tahun 2015 unit sarana pendidikansekolah dasar sehat yang paling rendah berada pada wilayah kerja Puskesmas Poasia. Tujuan penelitian ini adalahuntuk mengetahui pengaruh pendidikan kesehatan melalui strategi pemberdayaan guru terhadap perilaku(pengetahuan, sikap dan tindakan) PHBS sebelum dan sesudah intervensi pada siswa/siswi kelas V di SDN 06Poasia Kota Kendari Tahun 2016. Jenis penelitian yang digunakan adalah Pra-Eksperimental dengan desain OneGroup Pre test - Post test Design. Populasi dari penelitian ini adalah seluruh siswa kelas V SDN 06 Poasia KotaKendari Tahun 2016 yang berjumlah 34 orang, teknik pengambilan sampel adalah total sampling yang berjumlah34 siswa terdiri dari 20 siswa/siswi kelas A dan 14 siswa/siswi kelas B. Pengumpulan data menggunakan kuesioneryang diberikan kepada responden sebelum dan sesudah diberikan pendidikan kesehatan melalui strategipemberdayaan guru. Analisis data menggunakan uji McNemar. Hasil penelitian, ada pengaruh pendidikankesehatan melalui strategi pemberdayaan guru yang diberikan pada siswa/siswi tentang PHBS, yaitupengetahuan p value (0,000) < α (0,05), sikap p value (0,000) < α (0,05), dan tindakan siswa/siswi p value (0,000) <α (0,05)

Faktor Yang Berhubungan Dengan Motivasi Kerja Pada Perawat Di Ruang Rawat Inap Rumah Sakit Jiwa Provinsi Sulawesi Tenggara Tahun 2016

Motivasi adalah sebuah dorongan yang muncul dari dalam diri seseorang yang akan mengarahkan tindakanseseorang dengan tujuan mencapai suatu hasil yang diinginkannya. Variabel motivasi kerja ini secara operasionaldiukur dengan menggunakan beberapa indikator meliputi kebutuhan, keinginan/harapan, dan lingkungan kerja.Motivasi penting karena motivasi adalah hal yang menyebabkan, menyalurkan dan mendukung perilaku manusiasupaya mau bekerja giat dan antusias mencapai hasil yang optimal. Tujuan penelitian ini untuk mengetahuihubungan status kepegawaian, masa kerja, rekan kerja, kondisi kerja dan gaji dengan motivasi kerja perawat diruang rawat inap Rumah Sakit Jiwa Provinsi Sulawesi Tenggara. Penelitian ini bersifat kuantitatif denganpendekatan cross sectional, jumlah sampel 45 responden yang berstatus PNS dan Non PNS yang diperoleh daripopulasi 116 dengan menggunakan teknik pengambilan sampel purposive. Data yang diperoleh dalam penelitianini adalah data primer dari kuesioner yang disebarkan kepada perawat. Hasil penelitian ini menunjukkan bahwasebanyak 34 responden (75,6% perawat) memiliki motivasi kerja tinggi dan 11 responden (24,4% perawat)memiliki motivasi kerja rendah. Dari analisis bivariat antar variabel ditemukan bahwa tidak ada yang memilikihubungan signifikan dengan motivasi kerja perawat terhadap status kepegawaian, masa kerja, rekan kerja, kondisikerja dan gaji. Saran bagi yang berwenang tinggi dalam Rumah Sakit Jiwa untuk memperhatikan perawat yangbekerja di setiap ruangan, tidak hanya terpaku pada satu ruangan saja dan berlaku PNS maupun Non PNSsehingga ketepatan waktu bekerja selalu terjaga

Learning cover context-free grammars from structural data

We consider the problem of learning an unknown context-free grammar when the only knowledge available and of interest to the learner is about its structural descriptions with depth at most $\ell.$ The goal is to learn a cover context-free grammar (CCFG) with respect to $\ell$, that is, a CFG whose structural descriptions with depth at most $\ell$ agree with those of the unknown CFG. We propose an algorithm, called $LA^\ell$, that efficiently learns a CCFG using two types of queries: structural equivalence and structural membership. We show that $LA^\ell$ runs in time polynomial in the number of states of a minimal deterministic finite cover tree automaton (DCTA) with respect to $\ell$. This number is often much smaller than the number of states of a minimum deterministic finite tree automaton for the structural descriptions of the unknown grammar

A 10 Year Survey on Childhood CNS Tumors

AbstractObjectiveTumors of the central nervous system constitute the largest group of solid neoplasms in children and are second only to leukemia in their overall frequency during childhood. The main purpose of the present study is to determine the incidence, age, sex, location and histological diagnosis of CNS tumors in children, less than 15 years of age, in the Mofid Children's Hospital, in the past 10 years. Materials and MethodsIn this descriptive retrospective study we reviewed the medical records of 143 children with diagnosis of CNS tumors admitted during the past 10 years in neurology and surgery departments of Mofid Children's Hospital between the years 1996 and 2006.ResultsDuring the 10 year study period, CNS tumor was diagnosed in 143 patients; of these tumors, 119 were intracranial and 58 were intraspinal; 51.3% of brain tumors were located in the supratentorial and 48.7% in the infratentorial regions. The most common intracranial neoplasms were astrocytic tumors (36.8%), embryonal tumors (31.1%) and ependymal tumors (13.4%). Of the intraspinal neoplasms the most frequently noted were embryonal tumors(37.5%), mesenchymal meningothelial tumors (20.8%), followed by astrocytic tumors (16.7%). The median age at diagnosis was 8.9 ± 4.1 years with a male to female ratio of 1.4:1 (PConclusionBrain tumors in children constitute a diverse group in terms of incidence,distribution and histopathological diagnosis.

Single nucleotide polymorphisms (SNPs) in genes related to innate immune response against Salmonella in nursery pigs

The objective of this study was to investigate the association of single nucleotide polymorphisms (SNPs) in innate immune response genes with Salmonella shedding in nursery pigs. One hundred and sixty eight pigs on seven farrow-to- finish farms and one farrow-feeder operation were included in the study. On each farm, 21 pigs were selected from seven sows at weaning. Fecal samples were collected from selected pigs and cultured for Salmonella, and the isolates were serotyped. DNA was extracted from liver samples and used to genotype pigs for single nucleotide polymorphisms (SNPs) in 21 different innate immune response genes. In total, 15 (9.3%) pigs tested positive for Salmonella; the isolates from six pigs from four different litters on one farm were serotyped as Salmonella Infantis and from nine pigs from six different litters on another farm as Salmonella Worthington. SNP analysis showed an association of Salmonella shedding with a SNP in the genes encoding mannan-binding lectin (MBL)-associated serine protease-2 (MASP-2) and Toll-like receptor-1 (TLR-1) (P \u3c 0.05). These findings suggest that Salmonella shedding in pigs is controlled by genetic elements and these genetic variants could possibly be used to breed pigs that are more resistant to Salmonella colonization and Salmonella shedding

Risk of Death from Cardiovascular Disease Associated with Low-level Arsenic Exposure Among Long-term Smokers in a US Population-based Study

High levels of arsenic exposure have been associated with increases in cardiovascular disease risk. However, studies of arsenic’s effects at lower exposure levels are limited and few prospective studies exist in the United States using long-term arsenic exposure biomarkers. We conducted a prospective analysis of the association between toenail arsenic and cardiovascular disease mortality using longitudinal data collected on 3939 participants in the New Hampshire Skin Cancer Study. Using Cox proportional hazard models adjusted for potential confounders, we estimated hazard ratios and 95% confidence intervals associated with the risk of death from any cardiovascular disease, ischemic heart disease, and stroke, in relation to natural-log transformed toenail arsenic concentrations. In this US population, although we observed no overall association, arsenic exposure measured from toenail clipping samples was related to an increased risk of ischemic heart disease mortality among long-term smokers (as reported at baseline), with increased hazard ratios among individuals with ≥ 31 total smoking years (HR: 1.52, 95% CI: 1.02, 2.27), ≥ 30 pack-years (HR: 1.66, 95% CI: 1.12, 2.45), and among current smokers (HR: 1.69, 95% CI: 1.04, 2.75). These results are consistent with evidence from more highly exposed populations suggesting a synergistic relationship between arsenic exposure and smoking on health outcomes and support a role for lower-level arsenic exposure in ischemic heart disease mortality