bluuebunny/crossref_metadata_2025_split huggingface dataset:
Realization of transmission zeros for bandpass filter using inductive-coupled stub-loaded resonators
Authors: Cheng Fei , Lu Ping , Huang Kama 
Published: August 2019

AbstractThis article proposes a bandpass filter with three controllable transmission zeros (TZs) using three inductive-coupled stub-loaded resonators (SLRs). Different from other works, the proposed SLR can create one transmission pole and one TZ. With the TZs above the passband, high stopband rejection level is achieved. Moreover, the K-inverters are realized by short-circuit stubs between two adjacent SLRs. A general synthesis method for this kind of filter is described. For verification, a filter centered at 2.44 GHz with 0.18 GHz bandwidth is designed. The measured results show that the filter has three TZs at 3.1, 3.9, and 5 GHz. With those TZs, the filter's stopband rejection level is greatly improved.
Mapping histone modifications in low cell number and single cells using antibody-guided chromatin tagmentation (ACT-seq)
Authors: Carter Benjamin , Ku Wai Lim , Kang Jee Youn , Hu Gangqing , Perrie Jonathan , Tang Qingsong , Zhao Keji 
Published: August 2019

AbstractModern next-generation sequencing-based methods have empowered researchers to assay the epigenetic states of individual cells. Existing techniques for profiling epigenetic marks in single cells often require the use and optimization of time-intensive procedures such as drop fluidics, chromatin fragmentation, and end repair. Here we describe ACT-seq, a streamlined method for mapping genome-wide distributions of histone tail modifications, histone variants, and chromatin-binding proteins in a small number of or single cells. ACT-seq utilizes a fusion of Tn5 transposase to Protein A that is targeted to chromatin by a specific antibody, allowing chromatin fragmentation and sequence tag insertion specifically at genomic sites presenting the relevant antigen. The Tn5 transposase enables the use of an index multiplexing strategy (iACT-seq), which enables construction of thousands of single-cell libraries in one day by a single researcher without the need for drop-based fluidics or visual sorting. We conclude that ACT-seq present an attractive alternative to existing techniques for mapping epigenetic marks in single cells.
A chiral molecular propeller designed for unidirectional rotations on a surface
Authors: Zhang Yuan , Calupitan Jan Patrick , Rojas Tomas , Tumbleson Ryan , Erbland Guillaume , Kammerer Claire , Ajayi Tolulope Michael , Wang Shaoze , Curtiss Larry A. , Ngo Anh T. , Ulloa Sergio E. , Rapenne Gwénaël , Hla Saw Wai 
Published: August 2019

AbstractSynthetic molecular machines designed to operate on materials surfaces can convert energy into motion and they may be useful to incorporate into solid state devices. Here, we develop and characterize a multi-component molecular propeller that enables unidirectional rotations on a material surface when energized. Our propeller is composed of a rotator with three molecular blades linked via a ruthenium atom to a ratchet-shaped molecular gear. Upon adsorption on a gold crystal surface, the two dimensional nature of the surface breaks the symmetry and left or right tilting of the molecular gear-teeth induces chirality. The molecular gear dictates the rotational direction of the propellers and step-wise rotations can be induced by applying an electric field or using inelastic tunneling electrons from a scanning tunneling microscope tip. By means of scanning tunneling microscope manipulation and imaging, the rotation steps of individual molecular propellers are directly visualized, which confirms the unidirectional rotations of both left and right handed molecular propellers into clockwise and anticlockwise directions respectively.
Identification of an amphipathic peptide sensor of the Bacillus subtilis fluid membrane microdomains
Authors: Jiang Yiping , Dai Xin , Qin Mingming , Guo Zhihong 
Published: August 2019

AbstractRegions of increased fluidity are newly found bacterial membrane microdomains that are composed of short, unsaturated and branched fatty acyl chains in a fluid and disordered state. Currently, little is known about how proteins are recruited and localized to these membrane domains. Here, we identify a short amphipathic α-peptide in a previously unreported crystal structure and show that it is responsible for peripheral localization of the phosphate acyltransferase PlsX to the fluid microdomains in Bacillus subtilis. Mutations disrupting the amphipathic interaction or increasing the nonpolar interaction are found to redistribute the protein to the cytosol or other part of the plasma membrane, causing growth defects. These results reveal a mechanism of peripheral membrane sensing through optimizing nonpolar interaction with the special lipids in the microdomains. This finding shows that the fluid membrane microdomains may take advantage of their unique lipid environment as a means of recruiting and organizing proteins.
Smart city development in Hong Kong
Authors:   Office of the Government Chief Information Officer
Published: August 2019

The Government of the Hong Kong Special Administrative Region published its first Smart City Blueprint for Hong Kong in December 2017 with the vision to embrace innovation and technology to build a world‐famed Smart Hong Kong characterised by a strong economy and high quality of living. The blueprint maps out development plans covering six major areas, namely ‘smart mobility’, ‘smart living’, ‘smart environment’, ‘smart people’, ‘smart government’ and ‘smart economy’, in the following five years (up to 2022) and beyond. With over 70 initiatives set out in the blueprint, Hong Kong aims to be better equipped to address urban challenges, enhance the effectiveness of city management and improve people's quality of living as well as Hong Kong's sustainability, efficiency, and safety.
Gaia DR2 distances to Collinder 419 and NGC 2264 and new astrometric orbits for HD 193 322 Aa,Ab and 15 Mon Aa,Ab
Authors: Maíz Apellániz J. 
Published: August 2019

Context. On the one hand, the second data release of the Gaia mission (Gaia DR2) has opened a trove of astrometric and photometric data for Galactic clusters within a few kiloparsecs of the Sun. On the other hand, lucky imaging has been an operational technique to measure the relative positions of visual binary systems for a decade and a half. This time is sufficient to apply the results of the technique to the calculation of orbits of some massive multiple systems within ∼1 kpc of the Sun.
Aims. As part of an ambitious research program to measure distances to Galactic stellar groups (including clusters) containing O stars, I start with two of the nearest examples: Collinder 419 in Cygnus and NGC 2264 in Monoceros. The main ionizing source for each cluster is a multiple system with an O-type primary: HD 193 322 and 15 Mon, respectively. For each of the two multiple systems, I aim to derive new astrometric orbits for the Aa,Ab components.
Methods. First, I present a method that uses Gaia DR2 G + GBP + GRP photometry, positions, proper motions, and parallaxes to obtain the membership and distance of a stellar group and applied these values to Collinder 419 and NGC 2264. Second, I present a new code that calculates astrometric orbits by searching the whole seven-parameter orbit space and apply it to HD 193 322 Aa,Ab and 15 Mon Aa,Ab using, as input, literature data from the Washington Double Star Catalog and the AstraLux measurements recently presented by our group in another paper published this year.
Results. I obtain Gaia DR2 distances of 1006+37−34 pc for Collinder 419 and 719 ± 16 pc for NGC 2264; the main contribution to the uncertainties comes from the spatial covariance of the parallaxes. The two NGC 2264 subclusters are at the same distance (within the uncertainties) and show a significant relative proper motion. The distances are shown to be robust. HD 193 322 Aa,Ab follows an eccentric (e = 0.58+0.03−0.04) orbit with a period of 44 ± 1 a and the three stars it contains have a total mass of 76.1+9.9−7.4M⊙. The orbit of 15 Mon Aa,Ab is even more eccentric (e = 0.770+0.023−0.030); it has a period of 108 ± 12 a and a total mass of 45.1+3.6−3.3M⊙ for its two stars.
Constraining the detectability of water ice in debris disks
Authors: Kim M. , Wolf S. , Potapov A. , Mutschke H. , Jäger C. 
Published: August 2019

Context.Water ice is important for the evolution and preservation of life. Identifying the distribution of water ice in debris disks is therefore of great interest in the field of astrobiology. Furthermore, icy dust grains are expected to play important roles throughout the entire planet formation process. However, currently available observations only allow deriving weak conclusions about the existence of water ice in debris disks.Aims.We investigate whether it is feasible to detect water ice in typical debris disk systems. We take the following ice destruction mechanisms into account: sublimation of ice, dust production through planetesimal collisions, and photosputtering by UV-bright central stars. We consider icy dust mixture particles with various shapes consisting of amorphous ice, crystalline ice, astrosilicate, and vacuum inclusions (i.e., porous ice grains).Methods.We calculated optical properties of inhomogeneous icy dust mixtures using effective medium theories, that is, Maxwell-Garnett rules. Subsequently, we generated synthetic debris disk observables, such as spectral energy distributions and spatially resolved thermal reemission and scattered light intensity and polarization maps with our code DMS.Results.We find that the prominent ~3 and 44μm water ice features can be potentially detected in future observations of debris disks with theJames WebbSpace Telescope (JWST) and the Space Infrared telescope for Cosmology and Astrophysics (SPICA). We show that the sublimation of ice, collisions between planetesimals, and photosputtering caused by UV sources clearly affect the observational appearance of debris disk systems. In addition, highly porous ice (or ice-rich aggregates) tends to produce highly polarized radiation at around 3μm. Finally, the location of the ice survival line is determined by various dust properties such as a fractional ratio of ice versus dust, physical states of ice (amorphous or crystalline), and the porosity of icy grains.
Zum Beitrag: Frühgeburtenrate in 6 Perinatalzentren in Baden-Württemberg – Potenzial zur Reduktion der Frühgeborenenzahl
Authors: Rossi Rainer , Heller Günther , Maier Rolf F. 
Published: August 2019

Frühgeburtenrate in 6 Perinatalzentren in Baden-Württemberg – Potential zur Reduktion der Frühgeborenenzahl
Sehr geehrte Damen und Herren,mit großem Interesse haben wir die Arbeit von Trotter et al. 1 gelesen und teilen die Auffassung, dass eine Vermeidung von Frühgeburten und eine Reduzierung der Frühgeburtenrate unbedingt anzustreben ist, wie dies auch vom Bundesgesundheitsministerium als Nationales Gesundheitsziel „Gesundheit rund um die Geburt” gefordert wird 2.
YouTube as a Source of Patient Information for Prenatal Repair of Myelomeningocele
Authors: Castillo Jayme , Wassef Christina , Wassef Audrey , Stormes Katie , Berry Anna E. 
Published: August 2019

Abstract
Objective With the increasing interest in fetal repair of myelomeningoceles (MMCs) over the last decade, it is reasonable to anticipate the need for high quality and accessible educational materials for patients. Patients often look to the internet for details regarding medical topics and specifically to YouTube for informative health-related videos. This study aims to analyze the content and shortcomings of currently available videos on YouTube regarding prenatal repair of MMCs.
Study Design A YouTube search was performed on December 15, 2018, using the terms “fetoscopic surgery for neural tube defect” and “fetal surgery for neural tube defect.” The first 50 videos from each search were sorted by relevance and evaluated for video source (i.e., professional, personal, or other), target audience (medical professionals or general public), general descriptive statistics (i.e., video length, number of views, number of comments), and for five areas of content determined by the authors to constitute basic patient information regarding a surgical procedure: (1) procedure details, (2) eligibility criteria, (3) alternatives to surgery, (4) surgical risks, and (5) success rate. Accuracy of videos was not assessed.
Results Of the 16 videos that met inclusion criteria, only 1 discussed fetoscopic surgery. The majority (62.5%) of videos were produced by a professional source and 81.3% were targeted toward the general public rather than medical professionals. Of the 16 videos, 10 (62.5%) included details regarding the surgery, 3 (18.8%) discussed eligibility criteria, and 8 (50.0%) mentioned alternatives to surgery. Additionally, seven videos (43.8%) discussed risks of the procedure and six (37.5%) included surgical success rate.
Conclusion Only 2 of the 16 videos included all five areas of content that were evaluated, and both were in regard to open fetal repair. This study not only calls attention to the initial shortcomings of YouTube videos regarding fetal surgery for neural tube defects but also demonstrates the need for further investigation and more comprehensive analysis.
Nuclear safety in the unexpected second nuclear era
Authors: Wu Yican , Chen Zhibin , Wang Zhen , Chen Shanqi , Ge Daochuan , Chen Chao , Jia Jiangtao , Li Yazhou , Jin Ming , Zhou Tao , Wang Fang , Hu Liqin 
Published: August 2019

Significance
Despite great efforts to pursue a safe nuclear energy system during the first nuclear era, which was dominated by developed countries, severe nuclear accidents still occurred. Today, nuclear energy development has entered an unexpected second nuclear era, which is driven by developing countries. This may give rise to a great risk. Nuclear power plants are complex sociotechnical systems, and their safety has never been fully defined. We argue that social aspects, rather than just technical measures, must be involved to ensure nuclear safety. In this paper, the nature of nuclear safety is elucidated with identification of new challenges, and corresponding suggestions are proposed to improve nuclear safety in the unexpected second nuclear era.
Faster PET reconstruction with non-smooth priors by randomization and preconditioning
Authors: Ehrhardt Matthias J , Markiewicz Pawel , Schönlieb Carola-Bibiane 
Published: August 2019

Abstract
Uncompressed clinical data from modern positron emission tomography (PET) scanners are very large, exceeding 350 million data points (projection bins). The last decades have seen tremendous advancements in mathematical imaging tools many of which lead to non-smooth (i.e. non-differentiable) optimization problems which are much harder to solve than smooth optimization problems. Most of these tools have not been translated to clinical PET data, as the state-of-the-art algorithms for non-smooth problems do not scale well to large data. In this work, inspired by big data machine learning applications, we use advanced randomized optimization algorithms to solve the PET reconstruction problem for a very large class of non-smooth priors which includes for example total variation, total generalized variation, directional total variation and various different physical constraints. The proposed algorithm randomly uses subsets of the data and only updates the variables associated with these. While this idea often leads to divergent algorithms, we show that the proposed algorithm does indeed converge for any proper subset selection. Numerically, we show on real PET data (FDG and florbetapir) from a Siemens Biograph mMR that about ten projections and backprojections are sufficient to solve the MAP optimisation problem related to many popular non-smooth priors; thus showing that the proposed algorithm is fast enough to bring these models into routine clinical practice.
Characterization of Engine Performance, Combustion Process and Emission of Diesel/CNG Dual Fuel Engines with Pilot Injection Timing Variation at Low Load
Authors: Yuvenda Dori , Sudarmanta Bambang , Wahjudi Arif , Silva Jose da 
Published: August 2019

Abstract
The use of CNG on dual fuel diesel engines causes a decrease in engine performance, combustion and increased emissions, especially at low loads, which is affected by the addition of ignition delay period so that the maximum of peak combustion away from the top dead center (TDC). Pilot injection timing acts as an ignition delay controller. This research was carried out using an experimental method on diesel/CNG dual fuel engine a single-cylinder to determine the engine performance, combustion process and emissions characteristics with a variation of pilot injection timing from 110 to 190 BTDC with an interval of 20. The results showed an increase in thermal efficiency of 3.006%, maximum cylinder pressure up to 4.78 MPa, maximum heat release rate of up to 52.05 kJ/m3/0CA, and decrease hydrocarbons (HC), carbon dioxide (CO) and particulate matter (PM) emissions at pilot injection timing 170 BTDC under low load. Likewise, combustion performance has increased marked by a reduction in combustion duration and maximum of peak combustion approaching TDC by advancing the pilot injection timing on diesel/CNGdual fuel engine.
Effect of jet velocity on LPG to flame stability and flame temperature distribution on Inverse Difusion Flame (IDF)
Authors: Sumadhijono Pramoda Agung , Sudarmanta Bambang , Wahjudi Arif 
Published: August 2019

Abstract
Liquid Pretolium Gas (LPG) experimental investigation used to Inverse Diffusion Flame (IDF) burners is presented. The effect of fuel jet velocity on the flame stability and flame temperature distribution of LPG Inverse Diffusion Flame (IDF) was investigated. Fuel jet speed (Vf) = 0.154 m/s and 0.330 m/s was chosen for analysis. Air jet velocity varies from Va = 7.431 m/s to Va = 15.924 m/s for Vf = 0.154 m/s and Va = 8.493 m/s up to Va = 21.231 m/s for Vf=0.330 m/s . The results of the observation show that the velocity of the fuel jet affects the ratio of the velocity of the air-fuel jet which will ultimately have a significant effect on the flame. It was found that the stability of LPG IDF flame at Vf = 0.154 m/s occurred at Va = 11.677 m/s, the equivalence ratio (ϕ) = 1.99. The stability of LPG IDF flame at Vf = 0.330 m/s occurs at Va = 14.862 m/s with an equivalence ratio (ϕ) = 1.56. It was observed that the temperature along the IDF centerline increased when the distance from the burner (Z) exit increased. The nature of this temperature distribution shows that central cold air in the air jet is gradually heated towards the IDF downstream. The highest flame temperature is seen in Z between 90-110 mm. It was found that the length of the flame increased with increasing flow of fuel jets. At a constant fuel jet speed the flame length increases but will return again to a certain fuel-air ratio. At Vf = 0.154 m/s the highest flame height is 111 mm and at Vf = 0.330 m/s the highest flame height is 143 mm.
IoT-based Control and Monitoring for DC Motor Fed by Photovoltaic System
Authors: Wibowo Kusmayanto Hadi , Aripriharta  , Diantoro Markus , Wibawanto Slamet , Kirana Kartika Candra , Yunianto Saputra Fitrah Wicaksono , Chanif M Nuzulul 
Published: August 2019

Abstract
Internet of Thing (IoT) makes the monitoring and controlling process become accessible everywhere and every time. In this paper, the IoT is used to control the speed of a DC Motor remotely through smartphone apps. The proposed system uses the 50Wp solar panel and DC-DC Converter to provide 24V dc to the motor. In specific, a PID algorithm is applied to control motor speed from the measured back EMF. There are 3 experiments that have been done. The first is controlling motor speed through a smart phone, the second is the relationship between EMF and DC Motor speed, the third experiment was monitoring motor speed on Thingspeak and Blynk apps.
Effect of Vacuum Level on Heating Speed on Ethanol Destillation Process Using Coaxial Vacuum Tube Solar Collector
Authors: Sutomo  , Nuriana W , Sutrisno  , Triono J 
Published: August 2019

Abstract
Vacuum tube collectors that could produce heat up to a temperature of 80°C could be used to process ethanol distillation, because the evaporation process of ethanol only requires a temperature of 79°C at 1 atm. Vacuum tube collectors in terms of many types of heat absorbers, each type had a different heat absorption ability. This study will review the performance of the coaxial vacuum tube collector used for the process of ethanol distillation. The study was carried out in space using halogen lamps as solar radiation simulators. In the study conducted with three radiation variations, namely 998 W/m2, 878 W/m2, and 782 W/m2. The pressure / vacuum level of the collector tube cavity varies from 0.043 atm, 0.179 atm, 0.315 atm, 0.5atm, and 1 atm. Ethanol research material with 30% content using water as a distillation cooling medium. The results of this research could be known the effect of the vacuum level on the speed of achieving temperature in the distillation process using a solar collector coaxial vacuum tube.
Determination of Shelf Life and Proximate Analysis of Orumy Beverage Produced by Micro, Small and Medium Enterprise INOKAM in Dolly Distric
Authors: Ni’mah Yatim Lailun , Ameswari Vennycha Dwi 
Published: August 2019

Abstract
In this research, Orumy beverage have been made with the main ingredient of the Eucheuma cottoni seaweed spesies. For labeling and commercialization purposes, it is necessary to determine the shelf life and nutritional contents of seaweed beverages. The shelf life investigation in this study was conducted by Accelerated Shelf Life Testing (ASLT) method. While on the determination of nutritional content, the proximate analysis method was used. The Orumy beverage used in this research consists of three flavors: strawberry, lemon, and lychee. This study results that the shelf life of Orumy beverages with strawberry, lemon, and lychee flavors are 44 days, 45 days and 38 days at 30°C storage temperature respectively. The nutrients available in Orumy beverages with strawberry, lemon, and lychee flavors are ash content by 0.11 ± 0.01%, 0.11 ± 0.00%, 0.12 ± 0.02%, moisture content by 89.54 ± 0.01%, 88.53 ± 0.01%, 88.52 ± 0.01%, protein content by 0.65 ± 0.22%, 0.33 ± 0.23%, 0.33 ± 0.23%, crude fiber content by 3.34 ± 0.01%, 3.49 ± 0.01%, 3.39 ± 0.01%, fat content by 2.71 ± 0.24%, 2.75 ± 0.28%, 2.87 ± 0.21%, and carbohydrate by 2.71 ± 0.24%, 4.78 ± 0.55%, 4.78 ± 0.05%.
Enrichment Chromite Sand Grade Using Magnetic Separator
Authors: Subandrio S , Dahani W , Alghifar M , Purwiyono T T 
Published: August 2019

Abstract
To fulfil requirements of mettalurgical grade 48% Cr2O3 with Cr:Fe ratio 3:1 need the right beneficiation, one of them is using magnetic separator. Chromite sand sample obtain from Konowe-Southeast Sulawesi have low grade, so it needs process to enrichment Cr:Fe Ratio. Cr:Fe ratio feed was 0.55, after the process for size variation, roll speed, feeder speed and electric current decline Cr:Fe Ratio around 50.5%. When size -65+100 mesh Cr:Fe ratio was 0.282. At roll speed 20 RPM, feeder speed 50 Kg/Hr and electric current 1.5 A have Cr:Fe ratio 0.3525. Therefore, it needs more beneficiation before using magnetic separator for chromite sand from Konowe-Southeast Sulawesi.