Effect of Different Management Systems and Ejaculation Frequencies on Fertility and Hatchability of Turkey Eggs

A total of 72 local turkeys comprising 24 Toms and 4 hens were used for the study. The males were randomly divided into two groups; M1 and M2. Group M1 males were intensively managed and fed 17% CP and 12.6 MJ/kg Metabolizable energy breeder diet. Group M2 males were semi-intensively managed and subjected to free range management and given concentrates. The males in both groups were randomly divided into four groups and subjected to four ejaculation frequencies/treatments (once, twice, three times and four times) per week using abdominal massage technique. A total of 729 eggs were incubated, candled and analyzed for fertility and hatchability. The data obtained were subjected to analysis of variance in a 2x4 factorial arrangement in a Completely Randomized Design. Significant means were separated using Duncan's option of SPSS. The results obtained showed significant (p < 0.05) effect of ejaculation frequency and management system on fertility and hatchability in all the parameters measured. The number of fertile eggs (NF) was significantly (P< 0.05) affected by ejaculation frequency and management system. Once and twice per week ejaculation frequency produced the highest number of fertile eggs under M2. The number of infertile eggs was significantly (P<0.05) affected by ejaculation frequency, increasing with increase in ejaculation frequency in both management systems. Similarly, the number of early dead-embryo was significantly (P<0.05) affected by ejaculation frequency. Once per week ejaculation had the highest early dead embryo in both management systems. Percentage fertility ranged from 71 .01 I; 2.65% to 92.18 ± 21.18% in both management systems. Out of a number of 929 eggs incubated, 614 eggs were fertile. Percentage hatchability ranged from 85.1 1 ± 4.20%o to 100 ± 0.00 in both management systems. Therefore, two times per week ejaculation was ideal local forms used for AI, and both management systems could be used for rearing breeder toms

Decay spectroscopy at the two-proton drip line: radioactivity of the new nuclides 160Os and 156W

The radioactivity of 76160Os84 and 74156W82 that lie at the two-proton drip line have been measured in an experiment performed at the Accelerator Laboratory of the University of Jyväskylä. The 160Os nuclei were produced using fusion-evaporation reactions induced by a beam of 310 MeV 58Ni ions bombarding a 106Cd target. The 160Os ions were separated in flight using the recoil separator MARA and implanted into a double-sided silicon strip detector, which was used to measure their decays. The α decays of the ground state of 160Os (Eα = 7092(15) keV, t1/2 = 97−32+97 μs) and its isomeric state (Eα = 8890(10) keV, t1/2 = 41−9+15 μs) were measured, allowing the excitation energy of the isomer to be determined as 1844(18) keV. These α-decay properties and the excitation energy of the isomer are compared with systematics. The α decays were correlated with subsequent decays to investigate the β decays of the ground state of 156W, revealing that unlike its isotones, both low-lying isomers were populated in its daughter nuclide, 156Ta. An improved value for the half-life of the proton-decaying high-spin isomeric state in 73156Ta83 of 333−22+25 ms was obtained in a separate experiment using the same experimental systems with a 102Pd target. This result was employed to improve the precision of the half-life determined for 156W, which was measured as 157−34+57 ms

Perancangan Mesin Pemotong Kawat Bendrat Di PT. Surabaya Wire

Persaingan ketat di dunia industri seringkali menuntut pengusaha untuk menggunakan proses otomasi agar dapat meningkatkan kinerja mereka. Proses penimbangan dan pemotongan yang ada pada PT. Surabaya Wire masih manual dan membutuhkan waktu yang lama, sehingga dibutuhkan sebuah alat yang dapat memisahkan 1 kg kawat bendrat dan memotongnya secara otomatis. Proses ini dibagi menjadi dua bagian besar yaitu bagian pemisahan 1 kg kawat bendrat dan bagian pemotongan. Konsep dasar untuk memisahkan 1 kg kawat bendrat adalah dengan menggunakan panjangnya sebagai acuan. Ketika panjang kawat bendrat sudah sama dengan 1 kg, maka gulungan kawat akan dipisahkan dan dilanjutkan ke proses pemotongan. Bagian pemotongan menggunakan konsep sebuah tang potong namun lengan pemotong dimodifikasi agar dapat dilewati oleh gulungan kawat yang jatuh dari mesin coiler dan akhirnya dapat dipotong. Simulasi akan dilakukan terlebih dahulu sebelum proses fabrikasi.. Simulasi hanya dilakukan pada bagian pengambilan 1 kg. Simulasi yang dilakukan gagal karena pengambilan kawat tersebut ketika ditimbang terbaca 1.57 kg. Sehingga dibutuhkan penyesuaian lebih lanjut agar rancangan dapat berhasil

Multi-messenger Observations of a Binary Neutron Star Merger

International audienceOn 2017 August 17 a binary neutron star coalescence candidate (later designated GW170817) with merger time 12:41:04 UTC was observed through gravitational waves by the Advanced LIGO and Advanced Virgo detectors. The Fermi Gamma-ray Burst Monitor independently detected a gamma-ray burst (GRB 170817A) with a time delay of $\sim 1.7\,{\rm{s}}$ with respect to the merger time. From the gravitational-wave signal, the source was initially localized to a sky region of 31 deg(2) at a luminosity distance of ${40}_{-8}^{+8}$ Mpc and with component masses consistent with neutron stars. The component masses were later measured to be in the range 0.86 to 2.26 $\,{M}_{\odot }$. An extensive observing campaign was launched across the electromagnetic spectrum leading to the discovery of a bright optical transient (SSS17a, now with the IAU identification of AT 2017gfo) in NGC 4993 (at $\sim 40\,{\rm{Mpc}}$) less than 11 hours after the merger by the One-Meter, Two Hemisphere (1M2H) team using the 1 m Swope Telescope. The optical transient was independently detected by multiple teams within an hour. Subsequent observations targeted the object and its environment. Early ultraviolet observations revealed a blue transient that faded within 48 hours. Optical and infrared observations showed a redward evolution over ∼10 days. Following early non-detections, X-ray and radio emission were discovered at the transient’s position $\sim 9$ and $\sim 16$ days, respectively, after the merger. Both the X-ray and radio emission likely arise from a physical process that is distinct from the one that generates the UV/optical/near-infrared emission. No ultra-high-energy gamma-rays and no neutrino candidates consistent with the source were found in follow-up searches. These observations support the hypothesis that GW170817 was produced by the merger of two neutron stars in NGC 4993 followed by a short gamma-ray burst (GRB 170817A) and a kilonova/macronova powered by the radioactive decay of r-process nuclei synthesized in the ejecta