bluuebunny/crossref_metadata_2025 huggingface dataset:
Demonstration of 608 Gbps CO-OFDM Transmission using Gain Switched Comb
Authors: Venkatasubramani Lakshmi Narayanan , Lin Yi , Browning Colm , Vijay Anirudh , Smyth Frank , Koilpillai R. David , Barry Liam P , Venkitesh Deepa
Published: September 2020

We experimentally demonsttate 608 Gbps CO-OFDM superchannel transmission over 25 km using optical carrier generated from an externally injected gain-switched comb source with linewidth «19 kHz. We show the BER performance is within the HD- FEC limit.
Portable instrument for paper-based isothermal nucleic acid amplification tests
Authors: Liu Mingdian , Tang Zheyan , Monshat Hosein , Zhao Yuxin , Lu Meng
Published: September 2020

This paper demonstrates a paper-based nucleic acid amplification test with a portable instrument. The paper-based sensor provides the functions of reagent storage, sample transportation, and DNA amplification. The compact and low-cost fluorescence detector can quantify the amplicons in real-time. The results show that the sensor can detect multiple target genes with the concentration as low as 2 X 104 copies/gL.
Simulating One- and Two-Dimensional Ising Models in a Magnetic Field Using a Coherent Ising Machine
Authors: Takesue Hiroki , Inaba Kensuke , Inagaki Takahiro , Ikuta Takuya , Yamada Yasuhiro , Honjo Toshimori , Kazama Takushi , Enbutsu Koji , Umeki Takeshi , Kasahara Ryoichi
Published: September 2020

We report a coherent Ising machine (CIM) based on degenerate optical parametric oscillators with a magnetic field. The CIM successfully simulated behaviors of one- and twodimensional networks of 400 spins in a uniform magnetic field.
Programmable Fast All-Optical Thresholder
Authors: Jha Aashu , Huang Chaoran , de Lima Thomas Ferreira , Prucnal Paul R.
Published: September 2020

We theoretically study the effect of tree-carrier lifetime on processing speed and nonlinearity, pertaining to our all-optical thresholder. We also experimentally demonstrate speed improvement from 400 Mbps to 2.5 Gbps incorporating PN-junction mediated free-carrier removal.
Mid-infrared pumping of supercontinuum generation in single-crystal YAG optical fibers
Authors: Tripepi Michael , Eshel Ben , Vanderhoef Laura , Valenzuela Anthony , Averett Kent , Chowdhury Enam , Liebig Carl M.
Published: September 2020

Using ~3.6pm, 200fs, 500Hz laser pulses, we observed supercontinuum generation in 50 and 150pm outer dameter uidoped, single-crystal YAG fibers with sol-gel cladding. We note differences in supercontinuum based on diameter and cladding thickness.
Monostable Single Dissipative Kerr Soliton Generation in a Periodically Poled Lithium Niobate Microresonator
Authors: Tsao Eugene , Huang Shu-Wei
Published: September 2020

By establishing a generalizable framework based on the interplay of a fast, negative Kerr nonlinearity and a slow, thermo-optic redshift, we theoretically and numerically demonstrate deterministic, monostable single soliton generation in a proposed PPLN microresonator.
Alternating Projection Phase Recovery from Chromatic Aberration
Authors: Zhang Shaohui , Zhou Guocheng , Hu Yao , Hao Qun
Published: September 2020

We report a phase recovery method utilizing the chromatic aberration of telecentric objective and alternating projection algorithm. The axial defocus distance of each color channel and complex function of sample can be calculated simultaneously.
Efficient Raman Conversion in SF6- and CF4-Fi»ed Hollow-Core Photonic Bandgap Fibers
Authors: Edelstein Shahar , Ishaaya Amiel A.
Published: September 2020

We investigate Raman conversion in hollow-core photonic bandgap fibers pressurized with Sulfur hexafluoride (SFg) and Tetrafluoromethane (CF4) gases. We obtain conversion efficiency to the firat Stokes of 55.7% with SF6 and 45.4% with CF4.
Optical Biosensor Based on Ultrathin SOI Waveguides
Authors: Elsayed Mohamed , Mohamed Sherif , Aljaber Amina , Swillam Mohamed
Published: September 2020

We introduce an optical biosensor utilizing the MMI configuration and based on the ultrathin SOI platform. The biosensor was optimized using finite difference time domain simulations. A sensitivity of 420 nm/RIU was achieved.
A Radar-communication System Based on Optoelectronic Oscillator for Intelligent Transportation
Authors: Xue Zhujun , Li Shangyuan , Xiao Xuedi , Xue Xiaoxiao , Zheng Xiaoping , Zhou Bingkun
Published: September 2020

A hybrid radar-communication system for intelligent transportation based on optoelectronic oscillator is proposed. A code-stream with QPSK modulation of 2.4 Gb/s is generated experimentally at 24 GHz for high-speed communication and accurate ranging simultaneously.
Online Reliability of Planar Lightwave Circuit Splitters
Authors: Zheng Yu , Wu Yao , Xia Bingxing , Jiang Lianqiong
Published: September 2020

This paper focus on the optical performance of the Planar Lightwave Circuit (PLC) splitters in real-time testing and study the online reliability of the PLC splitters by on-line experimental testing.
Multiplexable Intrinsic Fabry-Perot Cavities using Femtosecond Laser Inscribed Scattering Centers
Authors: Wang Mohan , Wu Jingyu , Yang Yang , Zhao Kehao , Huang Sheng , Lan Hui , Buric Michael , Ohodnicki Paul , Liu Bo , Yu Qingxu , Chen Kevin P.
Published: September 2020

We propose a fabrication technique to multiplex Intrinsic Fabry-Perot Cavity sensors using femtosecond laser induced Rayleigh scattering centers. Up to 20 sensors were multiplexed and demodulated using a fast white-light interferometry demodulation algorithm.
Antiresonant Hollow-Core Fiber for Multiple Gas Detection in the Mid-IR
Authors: Jaworski Piotr , Yu Fei , Bojęś Piotr , Wu Dakun , Kozioł Paweł , Dudzik Grzegorz , Abramski Krzysztof , Liao Meisong , Krzempek Karol
Published: September 2020

We have fabricated an Antiresonant Hollow-Core Fiber for low-loss single-mode guidance in the Mid-IR and demonstrated its application to simultaneous detection of methane and ethane using Wavelength Modulation Spectroscopy.
Laser-Driven Light Source (LDLS™) With Multiple Fiber Outputs
Authors: Ye X. , Wang Q. , Dube M. , Gustafson D. , Zhu H.
Published: September 2020

A laser-driven light source (LDLS™) system with multiple fiber outputs is developed for photonic or semiconductor processing applications. Simulation and measurement results of fiber- to-fiber uniformity from 380nm to 1000nm are presented.
Spectral Flow Cytometry to Distinguish Tamoxifen Resistant Breast Cancer Cells
Authors: Bitton Aric C. , Houston Jessica P. , Houston Kevin D.
Published: September 2020

A multi-color spectral flow cytometry panel targeting receptors on MCF-7 breast cancer cells is used to potentially identify a tamoxifen resistant subpopulation. Results using separate resistant and normal cells indicate detection and sorting is plausible.
Realization of ultra-low-loss microscopic optics for quantum-enhanced imaging
Authors: Ochiai Natsuha , Ozeki Yasuyuki
Published: September 2020

We demonstrate microscopic optics with high transmittance of 89% using custom-made objective lenses, anti-reflection-coated cover slips, and axicons for beam shaping. We carefully designed the optics considering the position-dependent transmittance of the objective lenses
Wideband high-resolution spectral analysis assisted by soliton micro-combs
Authors: Hu Hao , Chen Liao , Wang Ruolan , Zhao Yanjing , Wang Xinyu , Wang Weiqiang , Zhang Chi , Zhang Wenfu , Zhang Xinliang
Published: September 2020

A high-resolution and large-bandwidth spectral analysis is demonstrated utilizing tunable laser and micro-comb. Bandwidth is extended by 100 times up to 2.5 THz with 2-MHz resolution and a high-Q resonator is successfully characterized in L-band.
Transfer Oscillator Technique for Generation of High- Stability Timing Signals from Optical References
Authors: Hati Archita , Pomponio Marco , Nardelli Nick , Baumann Esther , Fortier Tara , Nelson Craig
Published: September 2020

We generate a high stability 10 GHz microwave signals with close to 30 dB of comb noise suppression via optical frequency division using a transfer oscillator scheme.
ZEUS: A National Science Foundation mid-scale facility for laser-driven science in the QED regime
Authors: Nees John , Maksimchuk Anatoly , Kalinchenko Galina , Hou Bixue , Ma Yong , Campbell Paul , McKelvey Andrew , Willingale Louise , Jovanovic Igor , Kuranz Carolyn , Thomas Alexander , Krushelnick Karl
Published: September 2020

Building on past support, NSF has funded the Zetawatt Equivalent Ultrashort pulse laser System (ZEUS), a mid-scale 3PW multi-beam user facility, to explore nonlinear quantum electrodynamics, relativistic plasmas, and other phenomena in High-Field Science.
Broadly-tunable, High-resolution Mid-IR Spectroscopy
Authors: Foote David B. , Cich Matthew J. , Hurlbut Walter C. , Eismann Ulrich , Heiniger Adam T. , Christensen Daniel J. , Haimberger Chris
Published: September 2020

We demonstrate automated C2H2 direct absorption spectroscopy using a CW, tunable optical parametric oscillator, with a resolution of <5x10-4 cm-1 at 2 cm-1/min. We improve the resolution substantially by locking to a frequency comb.
Robust Self-Induced Nonreciprocal Transmission in Nonlinear PT-Symmetric Epsilon-Near-Zero Metamaterials
Authors: Jin Boyuan , Argyropoulos Christos
Published: September 2020

Self-induced nonreciprocal transmission is demonstrated due to the enhanced Kerr nonlinear effect in compact epsilon-near-zero media photonically doped with gain and loss defects. Unitary transmission contrast is obtained by operating close to the exceptional point.
2D Gradient Composition Alloys: Excitonic and Dielectric Properties
Authors: Kilinc Muhammed , Jalouli Alireza , Wang Peijian , Neureuter Christian , Zeng Hao , Thomay Tim
Published: September 2020

We map the optical properties with Raman, PL and SHG methods of a single gradient 2D alloy flake with spatially varying composition of CVD grown WSe2-WS2 monolayers that can be used in novel opto-electronics devices.
Controlling the Level of Coupling Between Quantum Emitters and Planar Hyperbolic Metamaterials
Authors: Tanyi E. K. , Van Schenck J. D. B. , Giesbers G. , Ostroverkhova O. , Cheng L.-J.
Published: September 2020

We discuss the effects of the ENZ position of multilayer HMM substrates (alternating layers Ag and ITO) on the level of their coupling with quantum emitters.
Fano Resonant All-dielectric HfO2 Metasurfaces for Full Color Generation Designed by Deep Learning
Authors: Hemmatyar Omid , Abdollahramezani Sajjad , Kiarashinejad Yashar , Zandehshahvar Mohammadreza , Adibi Ali
Published: September 2020

Here, we experimentally demonstrate full color generation by a Fano-resonant all-dielectric metasurface (MS) consisting of HfO2 nanopillars (NPs), for the first time to our knowledge, designed by a novel deep learning approach named dimensionality reduction.
All-fiber counter-propagation pumped amplifier tailored for Coherent Beam Combining technique
Authors: Fsaifes Ihsan , Daniault Louis , Bellanger Séverine , Veinhard Matthieu , Schulz Daniel , Tafoya Jason , Sipes Donald , Chanteloup Jean-Christophe
Published: September 2020

we report on the qualification of an all-fiber counter propagating pumped amplifier by using a narrow-linewidth single-frequency nanosecond fiber laser. The proposed amplifier design is tailored to be used for coherent beam combining of fiber amplifiers in tiled-aperture configuration.
Exploiting Resonant Band of Antiresonant Hollow Core Fiber for Highly Birefringent Inline Fiber Polarizer
Authors: Goel Charu , Yoo Seongwoo
Published: September 2020

We present first report on an inline fiber polarizer design based on single-ring negative curvature fiber. Polarization filtering is achieved by selectively coupling one polarization to glass modes with extinction ratio >30dB and birefringence >10-4
Experimental Evidence of the Real Multimode Nature of Geometric Parametric Instability
Authors: Leventoux Y. , Granger G. , Tonello A. , Krupa K. , Millot G. , Wabnitz S. , Février S. , Couderc V.
Published: September 2020

We show experimentally that geometric parametric instability in graded-index multimode fibers is composed by several multimode spectral components. The experimental observation is obtained by using a new 3D technique of high-resolution spatial and spectral analysis.
Refractive Index Measurement of Hazardous Liquid Samples using Common Path Bessel Beam Optical Interferometry
Authors: Pandey A , Gupta P , Vairagi K , Mondal S K
Published: September 2020

This work reports a packaged optical fiber axicon probe generating Bessel beam and Bessel beam interferometry technique for measuring RI of hazardous liquid HCL, H2SO4. The measurement resolution of our system is 1*10 "4± 0.0007.
Ultra-Broadband Spectrum Generation from a Stretched-Pulse Mode-locked Yb-doped Fiber Laser at High Repetition Rate
Authors: Yokokawa Shoko , Jin Lei , Set Sze Yun , Yamashita Shinji
Published: September 2020

Spectrum over 100 nm was generated from a mode-locked Yb-doped fiber laser at 169 MHz. Simulations revealed that broadband originated from the scheme of stretched-pulse rather than similariton.
Interpreting fiber-guided mode degeneracy lifting as spinorbit interaction of orbital angular momentum modes
Authors: Fang Liang , Wang Jian
Published: September 2020

We present a visual interpretation of fiber-guided mode degeneracy lifting as spin-orbit interaction of orbital angular momentum modes in a ray picture, and the analytical results are verified by comparing them with eigen equation solutions.
Real-Time Collision Dynamics of Vector Solitons in a Fiber Laser
Authors: Zhao Kangjun , Xiao Xiaosheng , Yang Changxi
Published: September 2020

Real-time collision dynamics of vector solitons in a polarization-multiplexed mode- locked fiber laser was investigated with the help of time-stretch dispersive Fourier transform technique. Numerical simulation matches well with our experiments.
Soliton Comb Generation from a Fabry-Perot Microresonator
Authors: Wang Xiaohan , Jia Kunpeng , Kwon Dohyeon , Wang Jiarong , Tsao Eugene , Guo Jian , Jiang Xiaoshun , Kim Jungwon , Zhu Shi-ning , Xie Zhenda , Huang Shu-Wei
Published: September 2020

We demonstrate a Kerr soliton comb generation from a high-quality-factor fiber Fabry- Perotmicroresonator. Single soliton can be achieved, with narrow beatnote linewidth and nearquantum-noise-limited low phase noise.
Carrier-envelope-offset-stable Yb:CaF2 laser pumped by a single-mode laser diode
Authors: Kowalczyk Maciej , Hudzikowski Arkadiusz , Porębski Michał , Sotor Jarosław
Published: September 2020

We present a carrier-envelope-offset-stabilized, self-referenceable Yb:CaF2 oscillator. Employed single-mode diode pumping scheme enabled us to achieve low-noise operation with sub-70 mrad integrated phase noise of the locked fceo beat note (1 Hz - 1 MHz).
Real-time detection of transient roundtrip property in ultrafast lasers
Authors: Xian Tianhao , Zhan Li , Wang Wenchao , Zhang Wenyan , Gao Lirun
Published: September 2020

We demonstrate the dispersive temporal interferometer technique to detect the intracavity dynamics of ultrafast lasers. The roundtrip time variation during and after pulse formation and the relaxation process is real-time observed for the first time.
Highly efficient, octave-spanning mid-infrared OPA in ZnGeP2 pumped by a femtosecond Cr:ZnSe laser
Authors: Nam Sang-Hoon , Hong Kyung-Han
Published: September 2020

We present octave-spanning femtosecond mid-infrared optical parametric amplification in ZnGeP2, pumped by a 2.4 pm Cr:ZnSe chirped-pulse amplifier. The full spectral coverage of 3-10 pm and a conversion efficiency of up to 23% have been obtained.
Omni-Resonant Space-Time Wave Packets Are Invariant After Traversing a Narrow Linewidth Fabry-Perot Cavity
Authors: Shiri Abbas , Yessenov Murat , Aravindakshan Rohinraj , Abouraddy Ayman F.
Published: September 2020

We describe theoretically and verify experimentally a class of diffraction-free pulsed optical beams that are ‘omni-resonant’: they are transmitted through planar Fabry- Perot resonators without spectral filtering even if their bandwidth far exceeds the cavity resonant linewidth.
A Continuously Tunable Ultrafast Doubly-Resonant Optical Parametric Oscillator
Authors: Ning Chengxiao , Liu Pei , Zhang Zhaowei
Published: September 2020

A continuously tunable ultrafast doubly-resonant OPO with central-wavelength tunable over 1910-2070 nm for signal pulses and 2140-2340 nm for idler pulses has been demonstrated by introducing a frequency selection element into the cavity-length-locking system.
Modification of photoinduced electron transfer in the strong light-matter coupling regime
Authors: Krainova Nina , Giebink Noel C.
Published: September 2020

We report non-trivial changes in the photoconductivity of organic semiconductor polarons when their optical transition is strongly-coupled to a microcavity mode. Our observations point to a change in the underlying photoinduced electron transfer process.
Fabrication of a thermostable Ga-face GaN template on a molybdenum substrate via layer transfer
Authors: Wang Qing , Liang Zhiwen , Wang Qi , Zhang Guoyi
Published: September 2020

Gallium nitride (GaN) films on high-thermal-conductivity substrates have attracted considerable attention for their applications in high-power light-emitting diodes and electronic devices. Herein, a 2-inch 8-µm-thick thermostable GaN/Mo template with Ga-face was fabricated via two consecutive layer transfer technique. The full-widths at half-maximum for the x-ray rocking curves of GaN (002) and (102) plane were 314 and 325 arcsec, respectively. Atomic force microscopy revealed that the surface had step-and-terrace structures with a root-mean-square value of 0.397 nm. Five periods of In0.15Ga0.85N/GaN multiple-quantum-wells and Mg-doped p-type GaN layers were regrown on the GaN/Mo template, which exhibited blue light emission without distinct degradation.
All-metallic metasurfaces towards high-performance magneto-plasmonic sensing devices
Authors: Li Lixia , Zong Xueyang , Liu Yufang
Published: September 2020

Magneto-plasmonic sensors based on surface plasmon resonance have been studied considerably in recent years, as they feature high sensitivity and ultrahigh resolution. However, the majority of such investigations focus on prism-based sandwich architectures that not only impede the miniaturization of devices but also have a weak transverse magneto-optical Kerr effect (TMOKE) in magnitude. Herein, we theoretically demonstrate a magneto-plasmonic sensor composed of Au/Co bilayer nanodisk arrays on top of optically thick metallic films, which supports a narrow surface plasmon resonance (SPR) with a bandwidth of 7 nm and allows for refractive index sensitivities as high as 717 nm/RIU. Thanks to the high-quality SPR mode, a Fano-like TMOKE spectrum with a subnanometer bandwidth can be achieved in the proposed structure, thereby giving rise to ultrahigh sensing of merit values as large as 7000 in water. Moreover, we demonstrate a large TMOKE magnitude that exceeds 0.6. The value is 1 order of magnitude larger than that of magneto-plasmonic sensors reported. We also demonstrate that the behavior of TMOKE spectra can be controlled by tuning the geometrical parameters of the device including the diameter and thickness of nanodisk arrays. This work provides a promising route for designing magneto-plasmonic sensors based on metasurfaces or metamaterials.
Massa específica e teor de umidade ao longo do fuste para cordia trichotoma e cordia americana e suas correlações
Authors: Zanchetta Laura Da Silva , Bandera Eduarda , Mangini Tauana De Souza , Candaten Luana , Iora Adriana Maria , Trautenmüller Jonathan William , Trevisan Rômulo , Eloy Elder
Published: September 2020

A variação da massa específica da madeira pode ocorrer entre e dentre espécies e até mesmo dentro da mesma árvore. A compreensão do comportamento dessa propriedade, através da relação entre espécies do mesmo gênero, é relevante para avaliar os usos dessas madeiras para os fins pretendidos. Por esta razão, o objetivo desse estudo foi determinar a massa específica e teor de umidade ao longo do fuste para Cordia trichotoma e Cordia americana e suas correlações quanto as propriedades físicas.  As árvores selecionadas de ambos indivíduos foram seccionadas em discos nas posições relativas de 25, 50, 75 e 100%, considerando a altura comercial determinada a partir do primeiro galho vivo, bem como a 0,10m (altura do toco) e no DAP (1,30 m do solo), de onde retirou-se cunhas para a determinação da variação longitudinal e correlações do teor de umidade, massa específica básica, aparente seco ao ar (14 a 15% na região do estudo) e saturada. Os resultados indicaram um decréscimo dos valores de todas as massas específicas nas posições base-topo para as duas espécies florestais analisadas, variação inversa ao apresentado pelo teor de umidade do material. Com base nos dados analisados, os parâmetros físicos da madeira de ambas as espécies apresentaram correlações positivas entre si. Os valores médios aritméticos de massa específica básica para as madeiras de C. trichotoma e C. americana, 0,379 e 0,484 g/cm³, respectivamente, caracterizam os materiais para uso na fabricação de móveis, lâminas faqueadas e peças valiosas tornadas.
Reestablishing Indonesian Madhhab: ‘Urf and the Contribution of Intellectualism
Authors: Najib Agus Moh
Published: September 2020

The notion of Indonesian madhhab (school of Islamic law) is usually considered to have stopped with Hasbi and Hazairin. On the contrary, The notion of  Indonesian madhhab has continued to grow and develop. Even though it has a variety of styles and trends, all of the notions of Indonesian madhhab have the same characteristics that are both contextual and formal. In addition to trying to formulate Islamic law in accordance with the context of Indonesian society, it also seeks to apply the results into statutory regulationswith formal applications. With such characteristics, the Indonesian madhhab places ‘urf (customs and community context) in a very important position as the main consideration in establishing Islamic law. Methodologically, to produce Islamic law in accordance with the Indonesian context, the Qur`anic text and the Hadith of the Prophet dialogue with Indonesian ‘urf. By using a historical approach to Islamic legal thinking, this article discusses the development of the ‘urf concept as put forward by the thinkers of Indonesian madhhab, since its emergence until now, and then discusses the influence of the notion of Indonesian madhhab regarding ‘urf in the legal products related to Islamic law in Indonesia. Following that scheme, this study found that the notion of Indonesian madhhab continues to develop along with the development of scholarly thinking about ‘urf from its thinkers.[Pemikiran tentang mazhab Indonesia biasanya dianggap telah berhenti sampai Hasbi dan Hazairin. Namun sebenarnya, pemikiran mazhab Indonesia tersebut terus mengalami perkembangan sampai dengan sekarang. Walaupun memiliki berbagai macam corak dan kecenderungan, namun semua pemikiran mazhab Indonesia tersebut memiliki karakteristik yang sama, yaitu bersifat kontekstual dan formal. Pemikiran mazhab Indonesia disamping berupaya memformulasikan hukum Islam sesuai dengan konteks masyarakat Indonesia, juga berusaha untuk menjadikan hasil formulasinya tersebut sebagai aturan perundang-undangan yang berlaku secara formal. Dengan karakteristiknya yang semacam itu, mazhab Indonesia menempatkan ‘urf (adat dan konteks masyarakat) pada posisi yang sangat penting sebagai dasar pertimbangan utama dalam penetapan hukum Islam. Secara metodologis, untuk menghasilkan hukum Islam yang sesuai dengan konteks Indonesia, dalam pemikiran mazhab Indonesia, teks Qur`an dan Hadis Nabi didialogkan dengan ‘urf Indonesia. Dengan menggunakan pendekatan sejarah terhadap pemikiran hukum Islam, artikel ini membahas perkembangan konsep ‘urf yang dikemukakan oleh para pemikir mazhab Indonesia, sejak mulai dicetuskannya hingga saat ini, kemudian dibahas juga pengaruh dari pemikiran mazhab Indonesia tentang ‘urf tersebut dalam produk aturan perundang-undangan yang terkait dengan hukum Islam di Indonesia. Dengan kajian tersebut, artikel ini menemukan bahwa pemikiran mazhab Indonesia terus berkembang seiring dengan perkembangan pemikiran tentang ‘urf dari para tokohnya.]
THE FUNCTIONAL STATUS OF THE CENTRAL NERVOUS SYSTEM IN MEDICAL STUDENTS IN THE MIDDLE OB REGION
Authors: Litovchenko Olga Gennadievna , Maksimova Anna Sergeevna , Barsegyan Siranush Tigranovna
Published: September 2020

In uncomfortable conditions, high academic load leads to adaptive changes in medical students. The functional status and level of functional capacities in students determines the effectiveness of adaptation and cognitive performance. Aim. The article aims to identify the features of the functional status of the central nervous system using the data of simple visual-motor reaction in medical students studying in the northern region. Materials and methods. 95 students were examined, 51 females and 44 males. The average age was 19.62 ± 1.57 years. The indicators of variational chronoreflexometry were determined through the data of simple visual-motor reaction. The level of functional capacities of the central nervous system, the stability of reactions, and the functional level of the system were calculated. The study was carried in accordance with the method proposed by M.P. Moroz (Express-diagnostics of the functional status and human performance). Results. It was established that in most cases the functional status of the central nervous system in medical students corresponded with reduced and slightly reduced mental performance. Simple visual-motor reaction time in male and female students was 280.47 ± 2.34 ms and 278.09 ± 2.92 ms, respectively. Significant differences were not revealed among the studied groups. Conclusion. The functional status of the central nervous system in medical students of the Middle Ob region is characterized by high neuropsychic tension, increased fatigue, decreased working capacity, weakened attention and concentration.
THE EFFECT OF DIFFERENT VOLUMES OF COMPUTER LOAD ON THE LATENT PERIODS OF A SIMPLE SENSORIMOTOR REACTION IN PRIMARY SCHOOLCHILDREN
Authors: Pankova Nataliya Borisovna , Lebedeva Marina Andreevna , Noskin Leonid Alekseevich , Khlebnikova Nadezhda Nikolaevna , Karganov Mikhail Yurievich
Published: September 2020

Background. The digitalization of education makes relevant monitoring studies for assessing the impact of computer technologies on the functional status of children, their cognitive ca-pabilities and somatic support (“adaptation cost”). Aim. The paper aims to study the impact of different computer load on sensorimotor reactivity in primary schoolchildren. Materials and methods. The data obtained in Moscow schools in 2006-2011 were analyzed. Surveys were carried out twice a year (October, March-April) in 66 different educational organizations. In total, the study included data on 4205 first-fourth year schoolchildren. To evaluate the reaction time (RT) of simple sensorimotor reactions to light (L) and acoustic (A) stimuli, the computer movement meter equipment (CMM, INTOX, St. Petersburg, Russia) was used. Also, the RTA / RTL ratio was used for analysis. Results. There is a correlation between RT (both RTL and RTA) and the general (lesson-related and extracurricular) volume of computer load. It was different depending on gender and the season, and was opposite for RTL and RTA. It was established that excessive computer load (exceeding hygienic standard requirements by 3 or more times) increased the seasonal variability of RTL in spring testing, principally in the third and fourthyear girls. However, under the influence of high computer loads, the RTA / RTL ratio also changes – seasonal varia-bility is formed as a decrease of this indicator in spring testing, principally in the third and fourth-year boys. Conclusion. The data obtained indicate the ambiguity of the effect of high computer loads on sensorimotor reactivity. On the one hand, there are symptoms of fatigue in children during the academic year, which requires compensation through health promotion education. On the other hand, there is a formation of a new skill during the academic year. This period of skill formation is recommended for extension through the summer period.
Identifikasi Bikeability Sebagai Pendukung Kebijakan Transportasi Berkelanjutan di Kota Yogyakarta
Authors: Kurniadhini Faricha , Roychansyah Muhammad Sani
Published: September 2020

Transportasi berkelanjutan menjadi kebutuhan baru Kota Yogyakarta untuk mengatasi permasalahan transportasi seperti kemacetan lalu lintas dan meningkatnya polusi udara. Memiliki sejarah sebagai kota sepeda, Kota Yogyakarta memiliki semangat untuk mengembalikan citra tersebut di tengah meningkatnya jumlah kendaraan bermotor di Kota Yogyakarta. Tahun 2008, pemerintah Kota Yogyakarta mengampanyekan sebuah semangat untuk mengajak penduduk menggunakan sepeda dalam bekerja dan sekolah. Namun demikian, semangat mengembalikan citra sebagai kota sepeda akan menjadi lebih baik jika pemerintah telah siap dalam hal kelembagaan dan infrastruktur untuk sepeda. Lalu, bagaimana kesiapan Kota Yogyakarta dalam memfasilitasi ajakan bersepeda tersebut? Penelitian ini bertujuan untuk mengidentifikasi kemampuan Kota Yogyakarta dalam hal keramahan untuk bersepeda atau disebut sebagai bikeability. Bikeability Kota Yogyakarta dapat dilihat melalui aspek spasial dan kelembagaan yang ada. Aspek spasial dalam bikeability diketahui dengan menggunakan metode Spatial Multi Criteria Analysis (SMCA) dan aspek kelembagaan diketahui dengan Ecomobility Readiness Assessment. Ketiga analisis tersebut memberikan hasil bahwa Kota Yogyakarta memiliki karakteristik fisik yang mendukung transportasi sepeda. Selain itu, perjalanan penduduk yang banyak dilakukan di dalam Kota Yogyakarta memberikan optimisme Kota Yogyakarta kembali menjadi kota sepeda. Hal ini diperjelas dengan komitmen pemerintah dalam memprioritaskan pesepeda dan pejalan kaki dalam kebijakan transportasi di Kota Yogyakarta. Sustainable transportation is a new necessity for Yogyakarta to overcome transportation problems such as traffic congestion and increased air pollution. Having a history as cycling city, Yogyakarta has a spirit to restore the image although it experiences the increasing number of motorized vehicles. In 2008, the government campaigned for inviting residents to use bicycle to go to work and schools. However, the spirit of returning the image of cycling city will be better if the government is capable in terms of institution and infrastructure for cycling. According to that, how is the bikeability condition and the readiness of Yogyakarta in accommodating cycling movement? This research aims to identify the ability of Yogyakarta in terms of friendliness for cycling or called bikeability. Bikeability of Yogyakarta can be identified by looking at the existing spatial and institutional aspects. The spatial aspect of bikeability is identified using the Spatial Multi-Criteria Analysis (SMCA) method while the institutional aspects is known by using Ecomobility Readiness Assessment Scorecard. Both analysis result that Yogyakarta has a good condition of physical characteristic that can promote cycling. It is strengthened by the government’s commitment in prioritizing cyclists and pedestrians in transportation policies of Yogyakarta.
Rola Towarzystwa Budownictwa Społecznego w zaspokajaniu lokalnych potrzeb mieszkaniowych
Authors: Biniasz-Celka Danuta
Published: September 2020

By the Act of 8 March 1990 on Municipal Self-Government, the legislator imposed a wide range of tasks to be performed by the municipality, including meeting the community’s needs in the area of municipal housing. The aim of the study is to present a legal entity that is autonomous from the commune and managed as a limited liability company, namely the Towarzystwo Budownictwa Społecznego (TBS) [Social Housing Society]. It operates under the Commercial Companies Code of 15 September 2000 within the scope resulting from Article 27(1) and (2) of the Act of 26 October 1995 on Certain Forms of Housing Promotion, thus performing the municipality’s housing tasks. TBS companies have been equipped with a legal personality primarily to become a more effective guarantor of the proper implementation of public tasks. The availability and standard of housing play a key role in meeting the housing needs of households. For those social groups that are unable to finance the purchase of a dwelling at market prices on their own, rental housing is a beneficial solution to meet their housing needs. The operations of the TBS are not subject to the principles of the market economy. The specificity of the company’s activity is that the primary and principal statutory objective cannot be profit-making, i.e. to seek to generate and maximise profits, but that any income must be allocated to statutory objectives. However, nothing stands in the way of such companies performing secondary and accessory activities at the same time, the income from which will support their non-commercial statutory objectives.
Analyzing the impact of system architecture on the scalability of OLTP engines for high-contention workloads
Authors: Appuswamy Raja , Anadiotis Angelos C. , Porobic Danica , Iman Mustafa K. , Ailamaki Anastasia
Published: September 2020

Main-memory OLTP engines are being increasingly deployed on multicore servers that provide abundant thread-level parallelism. However, recent research has shown that even the state-of-the-art OLTP engines are unable to exploit available parallelism for high contention workloads. While previous studies have shown the lack of scalability of all popular concurrency control protocols, they consider only one system architecture---a non-partitioned, shared everything one where transactions can be scheduled to run on any core and can access any data or metadata stored in shared memory.

In this paper, we perform a thorough analysis of the impact of other architectural alternatives (Data-oriented transaction execution, Partitioned Serial Execution, and Delegation) on scalability under high contention scenarios. In doing so, we present Trireme, a main-memory OLTP engine testbed that implements four system architectures and several popular concurrency control protocols in a single code base. Using Trireme, we present an extensive experimental study to understand i) the impact of each system architecture on overall scalability, ii) the interaction between system architecture and concurrency control protocols, and iii) the pros and cons of new architectures that have been proposed recently to explicitly deal with high-contention workloads.
An analytical study of large SPARQL query logs
Authors: Bonifati Angela , Martens Wim , Timm Thomas
Published: September 2020

With the adoption of RDF as the data model for Linked Data and the Semantic Web, query specification from end-users has become more and more common in SPARQL endpoints. In this paper, we conduct an in-depth analytical study of the queries formulated by end-users and harvested from large and up-to-date query logs from a wide variety of RDF data sources. As opposed to previous studies, ours is the first assessment on a voluminous query corpus, spanning over several years and covering many representative SPARQL endpoints. Apart from the syntactical structure of the queries, that exhibits already interesting results on this generalized corpus, we drill deeper in the structural characteristics related to the graph and hypergraph representation of queries. We outline the most common shapes of queries when visually displayed as undirected graphs, and characterize their (hyper-)tree width. Moreover, we analyze the evolution of queries over time, by introducing the novel concept of a streak, i.e., a sequence of queries that appear as subsequent modifications of a seed query. Our study offers several fresh insights on the already rich query features of real SPARQL queries formulated by real users, and brings us to draw a number of conclusions and pinpoint future directions for SPARQL query evaluation, query optimization, tuning, and benchmarking.
Discovery and ranking of embedded uniqueness constraints
Authors: Wei Ziheng , Leck Uwe , Link Sebastian
Published: September 2020

Data profiling is an enabler for efficient data management and effective analytics. The discovery of data dependencies is at the core of data profiling. We conduct the first study on the discovery of embedded uniqueness constraints (eUCs). These constraints represents unique column combinations embedded in complete fragments of incomplete data. We showcase their implementation as filtered indexes, and their application in integrity management and query optimization. We show that the decision variant of discovering a minimal eUC is NP-complete and W[2]-complete. We characterize the maximum possible solution size, and show which families of eUCs attain that size. Despite the challenges, experiments with real-world and synthetic benchmark data show that our column(row)-efficient algorithms perform well with a large number of columns(rows), and our hybrid algorithm combines ideas from both. We show how to rank eUCs to help identify relevant eUCs.
Online density bursting subgraph detection from temporal graphs
Authors: Chu Lingyang , Zhang Yanyan , Yang Yu , Wang Lanjun , Pei Jian
Published: September 2020

Given a temporal weighted graph that consists of a potentially endless stream of updates, we are interested in finding density bursting subgraphs (DBS for short), where a DBS is a subgraph that accumulates its density at the fastest speed. Online DBS detection enjoys many novel applications. At the same time, it is challenging since the time duration of a DBS can be arbitrarily long but a limited size storage can buffer only up to a certain number of updates. To tackle this problem, we observe the critical decomposability of DBSs and show that a DBS with a long time duration can be decomposed into a set of indecomposable DBSs with equal or larger burstiness. We further prove that the time duration of an indecomposable DBS is upper bounded and propose an efficient method
TopkDBSOL
to detect indecomposable DBSs in an online manner. Extensive experiments demonstrate the effectiveness, efficiency and scalability of
TopkDBSOL
in detecting significant DBSs from temporal graphs in real applications.
Selecting data to clean for fact checking
Authors: Sintos Stavros , Agarwal Pankaj K. , Yang Jun
Published: September 2020

We study the optimization problem of selecting numerical quantities to clean in order to fact-check claims based on such data. Oftentimes, such claims are technically correct, but they can still mislead for two reasons. First, data may contain uncertainty and errors. Second, data can be "fished" to advance particular positions. In practice, fact-checkers cannot afford to clean all data and must choose to clean what "matters the most" to checking a claim. We explore alternative definitions of what "matters the most": one is to ascertain claim qualities (by minimizing uncertainty in these measures), while an alternative is just to counter the claim (by maximizing the probability of finding a counterargument). We show whether the two objectives align with each other, with important implications on when fact-checkers should exercise care in selective data cleaning, to avoid potential bias introduced by their desire to counter claims. We develop efficient algorithms for solving the various variants of the optimization problem, showing significant improvements over naive solutions. The problem is particularly challenging because the objectives in the fact-checking context are complex, non-linear functions over data. We obtain results that generalize to a large class of functions, with potential applications beyond fact-checking.
Fully dynamic depth-first search in directed graphs
Authors: Yang Bohua , Wen Dong , Qin Lu , Zhang Ying , Wang Xubo , Lin Xuemin
Published: September 2020

Depth-first search (DFS) is a fundamental and important algorithm in graph analysis. It is the basis of many graph algorithms such as computing strongly connected components, testing planarity, and detecting biconnected components. The result of a DFS is normally shown as a DFS-Tree. Given the frequent updates in many real-world graphs (e.g., social networks and communication networks), we study the problem of DFS-Tree maintenance in dynamic directed graphs. In the literature, most works focus on the DFS-Tree maintenance problem in undirected graphs and directed acyclic graphs. However, their methods cannot easily be applied in the case of general directed graphs. Motivated by this, we propose a framework and corresponding algorithms for both edge insertion and deletion in general directed graphs. We further give several optimizations to speed up the algorithms. We conduct extensive experiments on 12 real-world datasets to show the efficiency of our proposed algorithms.
Discovery of approximate (and exact) denial constraints
Authors: Pena Eduardo H. M. , de Almeida Eduardo C. , Naumann Felix
Published: September 2020

Maintaining data consistency is known to be hard. Recent approaches have relied on integrity constraints to deal with the problem - correct and complete constraints naturally work towards data consistency. State-of-the-art data cleaning frameworks have used the formalism known as denial constraint (DC) to handle a wide range of real-world constraints. Each DC expresses a relationship between predicates that indicate which combinations of attribute values are inconsistent. The design of DCs, however, must keep pace with the complexity of data and applications.

The alternative to designing DCs by hand is automatically discovering DCs from data, which is computationally expensive due to the large search space of DCs. To tackle this challenging task, we present a novel algorithm to efficiently discover DCs: DCFinder. The algorithm combines data structures called position list indexes with techniques based on predicate selectivity to efficiently validate DC candidates. Because the available data often contain errors, DCFinder is especially designed to discovering approximate DCs, i.e., DCs that may partially hold. Our experimental evaluation uses real and synthetic datasets and shows that DCFinder outperforms all the existing approximate DC discovery algorithms.
Harmonia
Authors: Zhu Hang , Bai Zhihao , Li Jialin , Michael Ellis , Ports Dan R. K. , Stoica Ion , Jin Xin
Published: September 2020

Distributed storage employs replication to mask failures and improve availability. However, these systems typically exhibit a hard tradeoff between consistency and performance. Ensuring consistency introduces coordination overhead, and as a result the system throughput does not scale with the number of replicas. We present Harmonia, a replicated storage architecture that exploits the capability of new-generation programmable switches to obviate this tradeoff by providing near-linear scalability without sacrificing consistency. To achieve this goal, Harmonia detects read-write conflicts in the network, which enables any replica to serve reads for objects with no pending writes. Harmonia implements this functionality at line rate, thus imposing no performance overhead. We have implemented a prototype of Harmonia on a cluster of commodity servers connected by a Barefoot Tofino switch, and have integrated it with Redis. We demonstrate the generality of our approach by supporting a variety of replication protocols, including primary-backup, chain replication, Viewstamped Replication, and NOPaxos. Experimental results show that Harmonia improves the throughput of these protocols by up to 10 x for a replication factor of 10, providing near-linear scalability up to the limit of our testbed.
Development and validation of RP-HPLC/UV methods for the estimation of Risedronate sodium in pure and pharmaceutical dosage form
Authors: Subramaniam Ananda Thangadurai , Velmurugan Devi , Ramanathan Sambathkumar , Dhanabalan Kamalakannan , Munusamy Jambulingam , Gampala Hemanth
Published: September 2020

Recent study was conducted to develop and validate analytical methods for estimation ofÂ Risedronate sodium in pure and pharmaceutical dosage form using UV Spectroscopy andÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â RP- HPLC method.Â The first method (Method A)Â based on the UV Spectroscopy usingÂ 0.1M Hcl as diluent lambda max was found at 261 nm. Linearity existed perceived in the concentration between 10-50 Î¼g/ml (rÂ 2Â = 0.999) for the method. The method was validated pertaining to linearity, precision and accuracy studies, LOD and LOQ consistent with ICH guidelines.Â The second method (Method B), based on determination ofÂ Risedronate sodium tablet dosage form by RP-HPLC method.Â Â Chromatography separation was carried out on aÂ C18Â (150X4.6 mm x5 Âµ) SS Column using Methanol: Ammonium formate (85:15) as the mobile phase at a flow rate ofÂ Â Â 1.0 ml/min.Â The chromatographic analysis was carried out in the reflectance and absorbance mode at 254 nm and retention time of the drug was found to be 1.11 ml/min for standard and tablet. Linear responses of the drug were in the concentration range of 200-1000Â Âµg/ml. The accuracy of the method was assessed by standard dilution method and found to be 98% toÂ Â Â Â Â Â Â Â Â Â Â Â Â Â 102%Â .The results of the analysis were validated statistically prism software.Â The method established was found to be simple, precise, linear, accurate and sensitive. The developed method can be used for routine quality control analysis ofÂ Risedronate sodiumÂ in pure and pharmaceutical dosage form.
BatchDeconvolution: a Fiji plugin for increasing deconvolution workflow
Authors: Baster Zbigniew , Rajfur Zenon
Published: September 2020

Deconvolution microscopy is a very useful, software-based technique allowing to deblur microscopy images and increase both lateral and axial resolutions. It can be used along with many of fluorescence microscopy imaging techniques. By increasing axial resolution, it also enables three-dimensional imaging using a basic wide-field fluorescence microscope. Unfortunately, commercially available deconvolution software is expensive, while freely available programs have limited capabilities of a batch file processing. In this work we present BatchDeconvolution, a Fiji plugin that bridges two programs that we used subsequently in an image deconvolution pipeline: PSF Generator and DeconvolutionLab2, both from Biomedical Imaging Group, EPFL. Our software provides a simple way to perform a batch processing of multiple microscopy files with minimal working time required from the user.