The homestake surface-underground scintillations: Description

Two new detectors are currently under construction at the Homestake Gold Mine a 140-ton Large Area Scintillation Detector (LASD) with an upper surface area of 130 square meters, a geometry factor (for an isotropic flux) of 1200 square meters, sr, and a depth of 4200 m.w.e.; and a surface air shower array consisting of 100 scintillator elements, each 3 square meters, spanning an area of approximately square kilometers. Underground, half of the LASD is currently running and collecting muon data; on the surface, the first section of the air shower array will begin operation in the spring of 1985. The detectors and their capabilities are described

(3+2) Neutrino Scheme From A Singular Double See-Saw Mechanism

We obtain a 3+2 neutrino spectrum within a left-right symmetric framework by invoking a singular double see-saw mechanism. Higgs doublets are employed to break $SU_{R}(2)$ and three additional fermions, singlets under the left-right symmetric gauge group, are included. The introduction of a singularity into the singlet fermion Majorana mass matrix results in a light neutrino sector of three neutrinos containing predominantly $\nu_{\alpha L}$, $\alpha=e,\mu,\tau$, separated from two neutrinos containing a small $\nu_{\alpha L}$ component. The resulting active-sterile mixing in the $5\times 5$ mixing matrix is specified once the mass eigenvalues and the $3\times3$ submatrix corresponding to the MNS mixing matrix are known.Comment: 5 pages, matches published versio

Effective Nucleon-Nucleon Interaction and Fermi Liquid Theory

We present two novel relations between the quasiparticle interaction in nuclear matter and the unique low momentum nucleon-nucleon interaction in vacuum. These relations provide two independent constraints on the Fermi liquid parameters of nuclear matter. Moreover, the new constraints define two combinations of Fermi liquid parameters, which are invariant under the renormalization group flow in the particle-hole channels. Using empirical values for the spin-independent Fermi liquid parameters, we are able to compute the major spin-dependent ones by imposing the new constraints as well as the Pauli principle sum rules.Comment: 4 pages, 5 figures, in Proc. 11th International Conference on Recent Progress in Many-Body Theories, Manchester, UK, July 9-13, 200

Slepton pair production in e+e- collision in supersymmetric left-right model

The pair production of sleptons in electron-positron collisions is investigated in a supersymmetric left-right model. The cross section is found considerably larger than in the minimal supersymmetric version of the Standard Model (MSSM) because of more contributing graphs. A novel process is a doubly charged higgsino exchange in u-channel, which makes the angular distribution of the final state particles and the final state asymmetries to differ from those of the MSSM. It also allows for the flavour non-diagonal final states $\tilde e\tilde\mu$, $\tilde e\tilde\tau$ and $\tilde \mu\tilde\tau$, forbidden in the MSSM. These processes also give indirect information about neutrino mixings since they depend on the same couplings as the Majorana mass terms of the right-handed neutrinos.Comment: 13 pages + 4figures available upon request, HU-SEFT R 1993-1

Status of the Solar Neutrino Puzzle

Using the latest results from the solar neutrino experiments and a few standard assumptions, I show that the popular solar models are ruled out at the 3$\sigma$ level or at least TWO of the experiments are incorrect. Alternatively, one of the assumptions could be in error. These assumptions are spelled out in detail as well as how each one affects the argument.Comment: Latex, 8 pages + 4 uuencoded figures, minor changes made, FERMILAB-PUB/273-

Ceria-Molybdenum Mix Metal Oxide: A Mild and Efficient Recyclable Catalyst for One-Pot Synthesis of Polyhydroquinoline via Hantzsch Reaction

In laboratory, ceria-molybdenum mix metal oxide catalyst was synthesized by using simple grinding method and characterized by FT-IR, XRD, SEM, and EDX. Catalytic activities of catalyst were testified in Hantzsch condensation reaction for the synthesis of polyhydroquinoline by using dimedone, substituted aryl aldehydes, ethylacetoacetate and ammonium acetate with high percent yield. It is an efficient catalyst for 1,4-dihydropyridines synthesis. Cerium molybdenum mix metal oxide catalyst can be re-covered and re-used. DOI: http://dx.doi.org/10.17807/orbital.v12i1.142

HUBUNGAN KEBIASAAN MENYIRIH DENGAN STATUS GINGIVA (KAJIAN PADA MASYARAKAT DESA LIPANG KECAMATAN ALOR TIMUR LAUT KABUPATEN ALOR NTT

Latar Belakang : Kebiasaan menyirih merupakan kegiatan yang telah bersifat turun- temurun yang berhubungan dengan upacara dan kegiatan budaya serta sosial. Penyakit gingiva merupakan penyakit yang ditandai dengan adanya peradangan pada gingiva. Kebiasaan menyirih dapat menyebabkan terjadinya penyakit gingiva. Tujuan Penelitian : Mengetahui hubungan kebiasaan menyirih dengan status gingiva berdasarkan frekuensi menyirih perhari dan lama menyirih pada masyarakat Desa Lipang Kecamatan Alor Timur Laut Kabupaten Alor NTT. Metode Penelitian : Penelitian menggunakan metode survey analitik yang bersifat cross sectional. Penelitian ini telah dilakukan pada bulan November – Desember 2018. Populasi pada penelitian ini adalah masyarakat penyirih yang berusia 25-65 tahun di Desa Lipang Kecamatan Alor Timur Laut Kabupaten Alor NTT. Pengambilan sampel dengan menggunakan teknik purposive sampling. Analisis data menggunakan uji kendall-tau. Hasil Penelitian : Masyarakat Desa Lipang mempunyai kebiasaan menyirih yang sering dengan frekuensi menyirih ˃ 3 kali sehari sebanyak 67.5% dan memiliki kebiasaan meyirih yang lama ˃ 3 tahun sebanyak 52.5% serta mempunyai status gingiva dengan kriteria sedang sebanyak 55%. Kesimpulan : Kebiasaan menyirih pada masyarakat Desa Lipang berhubungan dengan status gingiva. Kata Kunci : kebiasaan menyirih, status gingiv