Flux tubes, visons, and vortices in spin-charge separated superconductors

The idea of spin-charge separation in cuprate superconductors has been recently energized by Senthil and Fisher who formulated a Z_2 gauge theory and, within its context, proposed a ``vison detection'' experiment as a test for topological order in a sample with multiply connected geometry. Here we show that the same experiment can be performed to test for the spin-charge separation in U(1) [but not in SU(2)] theory and argue that vortex core spectroscopy can in fact distinguish between the different symmetries of the fictitious gauge field.Comment: 3 pages, 1 ps figure. Invited talk at the 13th International Symposium on Superconductivity in Toky

Unattended Autonomous Mission and System Management of an Unmanned Seaplane

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/90651/1/AIAA-2011-1614-249.pd

Fault Detection and Fail-Safe Operation with a Multiple-Redundancy Air-Data System

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/83640/1/AIAA-2010-7855-622.pd

The Fundamental Vibrational Frequencies and Spectroscopic Constants of the Dicyanoamine Anion, NCNCN\u3csup\u3e-\u3c/sup\u3e (C\u3csub\u3e2\u3c/sub\u3eN\u3csub\u3e3\u3c/sub\u3e\u3csup\u3e-\u3c/sup\u3e): Quantum Chemical Analysis for Astrophysical and Planetary Environments

© 2019. The American Astronomical Society. All rights reserved.. Detecting anions in space has relied on a strong collaboration between theoretical and laboratory analyses to measure rotational spectra and spectroscopic constants to high accuracy. The advent of improved quantum chemical tools operating at higher accuracy and reduced computational cost is a crucial solution for the fundamental characterization of astrophysically relevant anions and their detection in the interstellar medium (ISM) and planetary atmospheres. In this context, we have turned toward the quantum chemical analysis of the penta-atomic dicyanoamine anion NCNCN- (), a structurally bent and polar compound. We have performed high-level coupled cluster theory quartic force field computations of satisfying both computational cost and accuracy conditions. We provide for the first time accurate spectroscopic constants and vibrational frequencies for this ion. In addition to exhibiting various Fermi resonances, displays a bright ν 2 (2130.9 cm-1) and a less intense ν 1 (2190.7 cm-1) fundamental vibrational frequency, making for strong markers for future infrared observations \u3c5 μm. We have also determined near-IR overtone and combination bands of the bright fundamentals for which the 2ν 2 at 4312.1 cm-1 (2.319 μm) is the best candidate. could potentially exist and be detected in nitrogen-rich environments of the ISM such as IRC +10216 and other carbon-rich circumstellar envelopes, or in the atmosphere of Saturn\u27s moon Titan, where advanced N-based reactions may lead to its formation

Exchange biased anomalous Hall effect driven by frustration in a magnetic kagome lattice.

Co[Formula: see text]Sn[Formula: see text]S[Formula: see text] is a ferromagnetic Weyl semimetal that has been the subject of intense scientific interest due to its large anomalous Hall effect. We show that the coupling of this material's topological properties to its magnetic texture leads to a strongly exchange biased anomalous Hall effect. We argue that this is likely caused by the coexistence of ferromagnetism and geometric frustration intrinsic to the kagome network of magnetic ions, giving rise to spin-glass behavior and an exchange bias

Are there any ‘object detectors’ in the hidden layers of CNNs trained to identify objects or scenes?

Various methods of measuring unit selectivity have been developed with the aim of better understanding how neural networks work. But the different measures provide divergent estimates of selectivity, and this has led to different conclusions regarding the conditions in which selective object representations are learned and the functional relevance of these representations. In an attempt to better characterize object selectivity, we undertake a comparison of various selectivity measures on a large set of units in AlexNet, including localist selectivity, precision, class-conditional mean activity selectivity (CCMAS), network dissection,the human interpretation of activation maximization (AM) images, and standard signal-detection measures. We find that the different measures provide different estimates of object selectivity, with precision and CCMAS measures providing misleadingly high estimates. Indeed, the most selective units had a poor hit-rate or a high false-alarm rate (or both) in object classification, making them poor object detectors. We fail to find any units that are even remotely as selective as the 'grandmother cell' units reported in recurrent neural networks. In order to generalize these results, we compared selectivity measures on units in VGG-16 and GoogLeNet trained on the ImageNet or Places-365 datasets that have been described as 'object detectors'. Again, we find poor hit-rates and high false-alarm rates for object classification. We conclude that signal-detection measures provide a better assessment of single-unit selectivity compared to common alternative approaches, and that deep convolutional networks of image classification do not learn object detectors in their hidden layers.Comment: Published in Vision Research 2020, 19 pages, 8 figure

Attitude Control Testbed in Vacuum

The orbital industry is actively growing with a rapid increase in spacecraft injected into orbit each year. Many testbeds exist which make it possible to simulate various aspects of an orbital environment for the purpose of testing these spacecrafts. To simulate spacecraft rotation about three spatial axes in microgravity, many engineers use gyroscopes. However, the rings in these gyroscope systems inherently exert frictional forces on each other and do not account for gravity, which decreases their micro-gravity simulation accuracy. The objective of the Attitude Control Testbed in Vacuum (ACTIV) project is to design a gyroscope that uses electric motors housed in each rotational axis to provide an opposing torque to those produced by gravity and friction to simulate a microgravity environment. This controlled gyroscope will be designed to allow for spacecraft ranging from 3U to 12U in size so that varying spacecraft designs may be tested. This research project will be a continuation of the ongoing CubeSat Reaction Wheel Attitude Control Platform, which will provide three CubeSat testbeds to be used in the controlled gyroscope

OPTIMALISASI PENGELOLAAN WEBSITE DESA RESUN PESISIR KABUPATEN LINGGA

Community Service was held in the Coastal Resun Village, Lingga Regency. The purpose of this community service is to increase the knowledge and expertise of village officials in managing village websites. The method used is to provide assistance to the coastal resun village apparatus with implementation procedures; identification of partner needs, formulation of partner needs, and assistance in website optimization. The implementation time starts from October to November 2022. This activity is divided into three stages, namely; identification of problems, provision of discussion materials and assistance to village officials. The results of this activity are; The impact on increasing participants' knowledge and expertise on the importance of internet-based information services and in operating village websites, the village government immediately appointed employees who specifically managed the village website and village officials were very enthusiastic and immediately published news and expected ongoing guidancePengabdian Kepada Masyarakat di adakan di Desa Resun Pesisir Kabupaten Lingga. Tujuan dari Pengabdian kepada masyarakat ini adalah untuk meningkatkan pengetahuan dan keahlian perangkat desa dalam mengelola website desa. Metode yang digunakan adalah dengan melakukan pendampingan kepada perangkat desa resun pesisir dengan prosedur pelaksanaan; identifikasi kebutuhan mitra, perumusan kebutuhan mitra, dan pendampingan optimalisasi website. Waktu  pelaksanaan dimulai bulan Oktober sampai bulan November 2022. Kegiatan ini terbagi dari tiga tahap yaitu; identifikasi masalah, pemberian materi diskusi dan pendampingan terhadap perangkat desa. Hasil dari kegiatan ini berupa; Dampak pada peningkatan pengetahuan dan keahlian peserta terhadap pentingya layanan informasi berbasis internet dan dalam mengoperasikan website desa, pemerintah desa langsung menetapkan pegawai yang secara khusus mengelola website desa dan Perangkat desa sangat antusias dan langsung melakukan penerbitan berita dan mengharapkan bimbingan berkelanjutan

DISHARMONISASI KEPALA DAERAH (ANALISIS FRAMING ROBERT N. ENTMAN PADA PEMBERITAAN MEDIA ONLINE ULASAN.CO)

This research aims to understand and analyze how the online media outlet Ulasan.co frames the news about the leadership of the Governor and Deputy Governor of the Riau Islands, where three months after their inauguration, they were hit by issues of disharmony. Ulasan.co is the most prominent online media platform in the Riau Islands that frequently highlights these issues. This study analyzes the news texts from Ulasan.co titled "Dirty Plates" Amid the Ansar-Marlin Dispute. The research findings indicate that Ulasan.co's news framing is considered to lack "covering both sides" as it tends to present statements from only one party. The analysis is conducted using Robert N. Entman's framing model, yielding the following results: Problem Identification (identifying the problem's causes) is attributed to internal political conflict; Diagnose Causes (assessing the root causes) point to the Deputy Governor; Make Moral Judgements (moral evaluation) involve the professional stance of the Governor in maintaining governance continuity; and Treatment Recommendations (problem-solving and resolution) involve the call for resolving the issues and conflicts between the Governor and Deputy Governor, thereby allowing them to collaborate once again in advancing the Riau Islands Province

CubeSat Reaction Wheel Attitude Control Platform

As the aerospace industry grows, CubeSats have proven to be one of the most reliable and inexpensive methods of conducting orbital research and offering spacecraft design experience to students and hobbyists. This project has designed and manufactured a 1U, 3U, and 6U CubeSat testbed for autonomous control systems utilizing reaction wheels. The testbed will include three reaction wheels; each mounted to its own respective axis to allow for attitude control in three degrees of freedom. In addition to designing the hardware and electronics for each CubeSat, control systems will be derived and applied to each testbed to ensure each system functions properly. The final goal of the CubeSat testbed is to be integrated into a website where anyone can upload their own control algorithm and watch a live stream of how their algorithm performs on hardware in real time. This system is embedded in the Easy Controls website and will be an example of control scripts that users can use to guide them as they learn how to apply spacecraft controls