Science And Technology Center di Manado. Arsitektur Hi-tech

Pendidikan berwawasan IPTEK saat ini merupakan salah satu tolak ukur dalam mencetak generasi penerus yang berkualitas dan berdaya saing. Wawasan IPTEK mendorong masyarakatnya untuk terus berkembang mengikuti Perubahan zaman. Pemahaman akan IPTEK hendaknya ditanamkan sejak dini agar membentuk sikap ilmiah pada generasi muda sehingga nantinya dapat ikut berkontribusi dalam pembangunan daerah bahkan Negara. Untuk menanamkan sikap ilmiah tersebut kepada generasi muda sebaiknya dilakukan dengan cara yang praktis dan interaktif, karena pada umumnya generasi muda memiliki sifat-sifat yang senang mengeksplorasi berdasarkan pengalaman yang mereka dapatkan. Pembangunan Science and Technology Center sebagai wadah edukasi-rekreasi dengan penekanan pada bentuk peragaan langsung (hands-on) dan pameran interaktif serta penggunaan teknik audio-visual dinilai pantas untuk dihadirkan di suatu daerah terlebih khusus di Kota Manado. Sebagai dukungan suatu wadah yang mempresentasikan Ilmu Pengetahuan dan Teknologi, maka penerapan tema Arsitektur High Tech sangat tepat diterapkan pada bangunan Science and Technology Center ini. Implementasi tema pada bangunan ini adalah pada penggunaan material-material advanced. Pemilihan tema juga didasari pada salah satu filosofi dari Arsitektur High Tech itu sendiri yaitu pandangan positif terhadap ilmu pengetahuan dan memberikan kemudahan bagi penggunanya, seperti halnya teknologi dan ilmu pengetahuan yang memberikan kemudahan bagi manusia dan diharapkan kedepannya dapat mendorong dan memotivasi masyarakat untuk terus berinovasi dan bersaing dalam IPTEK..Kata Kunci : Arsitektur High Tech, Ilmu Pengetahuan, Science Center, Teknolog

Search for gravitational-lensing signatures in the full third observing run of the LIGO-Virgo network

Gravitational lensing by massive objects along the line of sight to the source causes distortions of gravitational wave-signals; such distortions may reveal information about fundamental physics, cosmology and astrophysics. In this work, we have extended the search for lensing signatures to all binary black hole events from the third observing run of the LIGO--Virgo network. We search for repeated signals from strong lensing by 1) performing targeted searches for subthreshold signals, 2) calculating the degree of overlap amongst the intrinsic parameters and sky location of pairs of signals, 3) comparing the similarities of the spectrograms amongst pairs of signals, and 4) performing dual-signal Bayesian analysis that takes into account selection effects and astrophysical knowledge. We also search for distortions to the gravitational waveform caused by 1) frequency-independent phase shifts in strongly lensed images, and 2) frequency-dependent modulation of the amplitude and phase due to point masses. None of these searches yields significant evidence for lensing. Finally, we use the non-detection of gravitational-wave lensing to constrain the lensing rate based on the latest merger-rate estimates and the fraction of dark matter composed of compact objects

Search for eccentric black hole coalescences during the third observing run of LIGO and Virgo

Despite the growing number of confident binary black hole coalescences observed through gravitational waves so far, the astrophysical origin of these binaries remains uncertain. Orbital eccentricity is one of the clearest tracers of binary formation channels. Identifying binary eccentricity, however, remains challenging due to the limited availability of gravitational waveforms that include effects of eccentricity. Here, we present observational results for a waveform-independent search sensitive to eccentric black hole coalescences, covering the third observing run (O3) of the LIGO and Virgo detectors. We identified no new high-significance candidates beyond those that were already identified with searches focusing on quasi-circular binaries. We determine the sensitivity of our search to high-mass (total mass M>70 M⊙) binaries covering eccentricities up to 0.3 at 15 Hz orbital frequency, and use this to compare model predictions to search results. Assuming all detections are indeed quasi-circular, for our fiducial population model, we place an upper limit for the merger rate density of high-mass binaries with eccentricities 0<e≤0.3 at 0.33 Gpc−3 yr−1 at 90\% confidence level