bluuebunny/crossref_metadata_2025 huggingface dataset:
Polyelectrolytes self-assembly: versatile membrane fabrication strategy
Authors: Li Xin , Liu Chang , Van der Bruggen Bart
Published: October 2020

Polyelectrolytes self-assembly is developing rapidly as a fascinating family of functional membrane fabrication strategies with the ability to modulate the architectures and physical–chemical characteristics of membranes at the molecular level.
Predicting the performance of polyvinylidene fluoride, polyethersulfone and polysulfone filtration membranes using machine learning
Authors: Liu Tingli , Liu Lunyang , Cui Fengchao , Ding Fang , Zhang Qifeng , Li Yunqi
Published: October 2020

We built machine learning-based models to predict the performance of filtration membranes, and integrated them into homemade standalone software (polySML).
Two-dimensional perovskite solar cells with high luminescence and ultra-low open-circuit voltage deficit
Authors: Lian Xiaomei , Zuo Lijian , Wu Haotian , Zhou Guanqing , Lin Chen , Zhu Haiming , Wu Gang , Cahen David , Chen Hongzheng
Published: October 2020

Cl− combined with heat-light co-treatment methods improved the Voc and ELQE to 1.29 V and 2.3% with an ultra-low Voc deficit of 0.36 V.
An experimental and theoretical study of exciplex-forming compounds containing trifluorobiphenyl and 3,6-di-tert-butylcarbazole units and their performance in OLEDs
Authors: Keruckiene R. , Guzauskas M. , Lapienyte L. , Simokaitiene J. , Volyniuk D. , Cameron J. , Skabara P. J. , Sini G. , Grazulevicius J. V.
Published: October 2020

Exciplex-based OLEDs with novel derivatives of trifluorobiphenyl and 3,6-di-tert-butylcarbazole exhibited maximum current, power and external efficiencies of 24.8 mA cm−2, 12.2 lm W−1 and 7.8%, respectively.
Enhanced tribocatalytic degradation using piezoelectric CdS nanowires for efficient water remediation
Authors: Yang Bian , Chen Haobin , Guo Xudong , Wang Lei , Xu Tao , Bian Jihong , Yang Yaodong , Liu Qida , Du Yaping , Lou Xiaojie
Published: October 2020

Friction-driven contaminant degradation is a novel and potential solution to mitigate environmental pollution.
Particularly developed transition from the 5D1 level of Eu3+ and its significant contribution to the improved photocatalysis of (Bi3Li)O4Cl2via prolonging the decay time of the excited state
Authors: Wei Donglei , Fan Zutao , Huang Yanlin , Seo Hyo Jin
Published: October 2020

There is a close correlation between the photoluminescence and photocatalysis of a semiconductor because the two processes involve the same electronic transition.
Improved dielectricity of anisotropic wood slices and bioinspired micropatterned film electrodes for highly sensitive flexible electronic sensors
Authors: Nie Kangchen , Wang Zhaosong , Zhou Hang , Tang Ruixin , Shen Xiaoping , Sun Qingfeng
Published: October 2020

Taking inspiration and utilizing materials directly from nature, a simple and green strategy to fabricate biomass-based highly sensitive flexible tactile sensors was developed.
Small intestine resection increases oxalate and citrate transporter expression and calcium oxalate crystal formation in rat hyperoxaluric kidneys
Authors: Tseng Yi-Shiou , Wu Wen-Bin , Chen Yun , Lo Yang Feili , Ma Ming-Chieh
Published: October 2020

Short bowel (SB) increases the risk of kidney stones. However, the underlying mechanism is unclear. Here, we examined how SB affected renal oxalate and citrate handlings for in vivo hyperoxaluric rats and in vitro tubular cells. SB was induced by small intestine resection in male Wistar rats. Sham-operated controls had no resection. After 7 days of recovery, the rats were divided into control, SB (both fed with distilled water), ethylene glycol (EG), and SB+EG (both fed with 0.75% EG for hyperoxaluric induction) groups for 28 days. We collected the plasma, 24 h of urine, kidney, and intestine tissues for analysis. Hypocitraturia was found and persisted up to 28 days for the SB group. Hypocalcemia and high plasma parathyroid hormone (PTH) levels were found in the 28-day SB rats. SB aggravated EG-mediated oxalate nephropathy by fostering hyperoxaluria and hypocitraturia, and increasing the degree of supersaturation and calcium oxalate (CaOx) crystal deposition. These effects were associated with renal up-regulations of the oxalate transporter solute carrier family 26 (Slc26)a6 and citrate transporter sodium-dependent dicarboxylate cotransporter-1 (NaDC-1) but not Slc26a2. The effects of PTH on the SB kidneys were then examined in NRK-52E tubular cells. Recombinant PTH attenuated oxalate-mediated cell injury and up-regulated NaDC-1 via protein kinase A (PKA) activation. PTH, however, showed no additive effects on oxalate-induced Slc26a6 and NaDC-1 up-regulation. Together, these results demonstrated that renal NaDC-1 upregulation-induced hypocitraturia weakened the defense against Slc26a6-mediated hyperoxaluria in SB kidneys for excess CaOx crystal formation. Increased tubular NaDC-1 expression caused by SB relied on PTH.
Halonium Catalysis: An Underutilized and Underexplored Catalytic Concept in Olefin Functionalizations
Authors: Li Wei , Gembreska Nathan R. , Vogel Alexander K. , Ziegelmeyer Elizabeth C. , Cheng Eric , Wu Fan , Roberts Leo P. , Vesoulis Megan M.
Published: October 2020

Iodonium catalysis is described here to accomplish an intermolecular olefin oxyamination reaction. Urea is used as the O- and N-source to add across both activated and unactivated alkenes in a regioselective manner. Mechanistic studies confirm the presence of an iodonium intermediate.

1 Introduction

2 Hypothesis

3 Optimizations and Scope

4 Mechanistic Probes

5 Future Outlook
Correction: Estimating temporary populations: a systematic review of the empirical literature
Authors: Panczak Radoslaw , Charles-Edwards Elin , Corcoran Jonathan
Published: October 2020

An amendment to this paper has been published and can be accessed via a link at the top of the paper.
Abnormal route to aging transition in a network of coupled oscillators
Authors: Rakshit Biswambhar , Rajendrakumar Niveditha , Balaram Bipin
Published: October 2020

In this article, we investigate the dynamical robustness in a network of Van der Pol oscillators. In particular, we consider a network of diffusively coupled Van der Pol oscillators to explore the aging transition phenomena. Our investigation reveals that the route to aging transition in a network of Van der Pol oscillator is different from that of typical sinusoidal oscillators such as Stuart–Landau oscillators. Unlike sinusoidal oscillators, the order parameter does not follow smooth second-order phase transition. Rather, we observe an abnormal phase transition of the order parameter due to the sudden appearance of unbounded trajectories at a critical point. We provide detailed bifurcation analysis of such an abnormal phase transition. We show that the boundary crisis of a limit-cycle oscillator is at the helm of such an unusual discontinuous path of aging transition.
Optimizing magnetically shielded solenoids
Authors: Chen W. C. , Hassan Md. T. , Erwin R. , Watson S. M. , Gentile T. R. , Jones G. L.
Published: October 2020

An important consideration when designing a magnetostatic cavity for various applications is to maximize the ratio of the volume of field homogeneity to the overall size of the cavity. We report a design of a magnetically shielded solenoid that significantly improves the transverse field gradient averaged over a volume of 1000 cm3 by placing compensation coils around the holes in the mu-metal end caps rather than the conventional design in which the compensation coils are placed on the main solenoid. Our application is polarized 3He-based neutron spin filters, and our goal was to minimize the volume-averaged transverse field gradient, thereby the gradient induced relaxation time, over a 3He cell. For solenoids with end cap holes of different sizes, additional improvements in the field gradient were accomplished by introducing non-identical compensation coils centered around the non-identical holes in the end caps. The improved designs have yielded an overall factor of 7 decrease in the gradient in the solenoid, hence a factor of 50 increase in the gradient induced relaxation time of the 3He polarization. The results from both simulation and experiments for the development of several such solenoids are presented. Whereas our focus is on the development of magnetically shielded solenoids for 3He neutron spin filters, the approach can be applied for other applications demanding a high level of field homogeneity over a large volume.
Catalysis and regioselectivity in hydrofunctionalization reactions of unsaturated carbon bonds. Part III
Authors: Beletskaya Irina P. , Nájera Carmen , Yus Miguel
Published: October 2020

The review addresses the possibility of obtaining Markovnikov and anti-Markovnikov isomers in the reactions of unsaturated hydrocarbons with organophosphorus and organosulfur compounds having P–H and S–H bonds using metal salts or complexes as catalysts.

The bibliography includes 247 references.
Adhesion-GPCR Gpr116 (ADGRF5) expression inhibits renal acid secretion
Authors: Zaidman Nathan A. , Tomilin Viktor N. , Hassanzadeh Khayyat Naghmeh , Damarla Mahendra , Tidmore Josephine , Capen Diane E. , Brown Dennis , Pochynyuk Oleh M. , Pluznick Jennifer L.
Published: October 2020

Significance

Gpr116 is an adhesion G protein-coupled receptor (aGPCR) that is highly expressed in the kidney. Here, we report that Gpr116 localizes to A-intercalated cells in the murine collecting duct, where it functions as a significant and critical regulator of renal acid secretion by regulating the surface expression of V-ATPase proton pumps. Kidney-specific Gpr116 knockout mice develop a unique acid-base disorder, “renal tubular alkalosis,” characterized by acidic urine and alkaline blood. These findings have significant implications for other tissues with Gpr116 expression, as well as other acid-secreting epithelia. Furthermore, we propose that Gpr116 may more generally regulate endocytosis, a function that would have wide-ranging implications for both Gpr116 function and for our understanding of aGPCRs.
Dynamically adjustable plasmon-induced transparency and switching application based on bilayer graphene metamaterials
Authors: Zhou Fengqi , Wang Yuqing , Zhang Xiao , Wang Jiawei , Liu Zhimin , Luo Xin , Zhang Zhenbin , Gao Enduo
Published: October 2020

A bilayer metamaterial composed of double graphene strips and square-ring graphene is proposed to realize plasmon induced transparency (PIT). The couple mode theory (CMT) is employed to explain the phenomenon of PIT, whose results are in good agreement with the simulation of the ﬁnite-difference time-domain. The dynamically adjustable PIT is investigated, where an on-to-off modulation composed of synchronous and asynchronous switching is realized by modulating the Fermi levels of graphene, the modulation degrees of amplitude are 67.5%, 86.1%, and 65.3%, respectively. The changes of transmission spectra are also studied by adjusting the coupling distance between double graphene strips and square-ring graphene, and the result shows that PIT is gradually disappeared with the increase of coupling distance and the decrease of coupling strength. Then, the corresponding relationships between dips of PIT and modes of CMT are described clearly, which are affected by the relative location between resonant points of the bright and dark modes.
A configuration design method for a redundant inertial navigation system based on diagnosability analysis
Authors: Li Baochen , Wang Huaiguang , Mu Liyuan , Shi Zhiyong , Du Binhan
Published: October 2020

Redundant design can improve the performance of an inertial navigation system, and the configuration is an important factor in determining the accuracy and reliability of the redundant inertial navigation system. As well as the sensor quantity and the reliability of single sensors, the reliability of the redundant inertial navigation system also depends on the capability of the fault diagnosis, which has been neglected in much of the previous research. This paper verifies that configurations designed using the previous method cannot maintain optimal performance in fault diagnosis. To optimize the performance in fault detection and isolation through the configuration design, an evaluation function for fault detectability and isolability is proposed based on Kullback–Leibler divergence. On this basis, the inherent diagnosability analysis method is proposed, and the configuration design method is developed with the analysis results. Simulation experiments prove that the proposed diagnosability analysis method can find the defects in the fault detection and isolation, and the diagnosability can be assessed correctly. Configurations designed using the proposed methodensure the optimal accuracy and reliability of the system, and effectively improve the fault diagnosis ability, too.
Engineering of the spin on dopant process on silicon on insulator substrate
Authors: Barri Chiara , Mafakheri Erfan , Fagiani Luca , Tavani Giulio , Barzaghi Andrea , Chrastina Daniel , Fedorov Alexey , Frigerio Jacopo , Lodari Mario , Scotognella Francesco , Arduca Elisa , Abbarchi Marco , Perego Michele , Bollani Monica
Published: October 2020

We report on a systematic analysis of phosphorus diffusion in silicon on insulator thin film via spin-on-dopant process (SOD). This method is used to provide an impurity source for semiconductor junction fabrication. The dopant is first spread into the substrate via SOD and then diffused by a rapid thermal annealing process. The dopant concentration and electron mobility were characterized at room and low temperature by four-probe and Hall bar electrical measurements. Time-of-flight-secondary ion mass spectroscopy was performed to estimate the diffusion profile of phosphorus for different annealing treatments. We find that a high phosphorous concentration (greater than 1020 atoms cm−3) with a limited diffusion of other chemical species and allowing to tune the electrical properties via annealing at high temperature for short time. The ease of implementation of the process, the low cost of the technique, the possibility to dope selectively and the uniform doping manufactured with statistical process control show that the methodology applied is very promising as an alternative to the conventional doping methods for the implementation of optoelectronic devices.
Impact of Mg level on lattice relaxation in a p-AlGaN hole source layer and attempting excimer laser annealing on p-AlGaN HSL of UVB emitters
Authors: Khan M Ajmal , Bermundo Juan Paolo , Ishikawa Yasuaki , Ikenoue Hiroshi , Fujikawa Sachie , Matsuura Eriko , Kashima Yukio , Maeda Noritoshi , Jo Masafumi , Hirayama Hideki
Published: October 2020

Mg-doped p-type semiconducting aluminium-gallium-nitride hole source layer (p-AlGaN HSL) materials are quite promising as a source of hole ‘p’ carriers for the ultraviolet-B (UVB) light-emitting diodes (LEDs) and laser diodes (LDs). However, the p-AlGaN HSL has a central issue of low hole injection due to poor activation of Mg atoms, and the presence of unwanted impurity contamination and the existence of a localized coherent state. Therefore, first the impact of the Mg level on the crystallinity, Al composition and relaxation conditions in the p-AlGaN HSL were studied. An increasing trend in the lattice-relaxation ratios with increasing Mg concentrations in the p-AlGaN HSL were observed. Ultimately, a 40%–60% relaxed and 1.4 μm thick p-AlGaN HSL structure with total threading dislocation densities (total-TDDs) of approximately ∼8–9 × 108 cm−2 was achieved, which almost matches our previous design of a 4 μm thick and 50% relaxed n-AlGaN electron source layer (ESL) with total-TDDs of approximately ∼7–8 × 108 cm−2. Subsequently, structurally a symmetric p–n junction for UVB emitters was accomplished. Finally, the influence of excimer laser annealing (ELA) on the activation of Mg concentration and on suppression of unwanted impurities as well as on the annihilation of the localized energy state in the p-AlGaN HSL were thoroughly investigated. ELA treatment suggested a reduced Ga–N bonding ratio and increased Ga–O, as well as Ga–Ga bonding ratios in the p-AlGaN HSL. After ELA treatment the localized coherent state was suppressed and, ultimately, the photoluminescence emission efficiency as well as conductivity were drastically improved in the p-AlGaN HSL. By using lightly polarized p-AlGaN HSL assisted by ELA treatment, quite low resistivity in p-type AlGaN HSL at room temperature (hole concentration is ∼2.6 × 1016 cm−3, the hole mobility is ∼9.6 cm2 V1 s−1 and the resistivity is ∼24.39 Ω. cm) were reported. ELA treatment has great potential for localized activation of p-AlGaN HSL as well as n- and p-electrodes on n-AlGaN and p-AlGaN contact layers during the flip-chip (FC) process in low operating UVB emitters, including UVB lasers.
Friction force reduction for electrical terminals using graphene coating
Authors: Zhang Suki N , Arfaei Babak , Chen Zhihong
Published: October 2020

Multi-layer graphene, serving as a conductive solid lubricant, is coated on the metal surface of electrical terminals. This graphene layer reduces the wear and the friction between two sliding metal surfaces while maintaining the same level of electrical conduction when a pair of terminals engage. The friction between the metal surfaces was tested under dry sliding in a cyclical insertion process with and without the graphene coating. Comprehensive characterizations were performed on the terminals to examine the insertion effects on graphene using scanning electron microscopy, four-probe resistance characterization, lateral force microscopy, and Raman spectroscopy. With the thin graphene layers grown by plasma enhanced chemical vapor deposition on gold (Au) and silver (Ag) terminals, the insertional forces can be reduced by 74 % and 34 % after the first cycle and 79 % and 32 % after the 10th cycle of terminal engagement compared with pristine Au and Ag terminals. The resistance of engaged terminals remains almost unchanged with the graphene coating. Graphene stays on the terminals to prevent wear-out during the cyclic insertional process and survives the industrial standardized reliability test through high humidity and thermal cycling with almost no change.
An observation on the Balmer–Bohr formula
Authors: Reed B Cameron
Published: October 2020

Hydrogen transition wavelengths computed with the familiar Balmer–Bohr formula are different than those reported in standard reference sources. The origin of this discrepancy, which is likely not well-known to instructors and students, is explained.
Electrical transport measurements for superconducting sulfur hydrides using boron-doped diamond electrodes on beveled diamond anvil
Authors: Matsumoto Ryo , Einaga Mari , Adachi Shintaro , Yamamoto Sayaka , Irifune Tetsuo , Terashima Kensei , Takeya Hiroyuki , Nakamoto Yuki , Shimizu Katsuya , Takano Yoshihiko
Published: October 2020

A diamond anvil cell (DAC) has become an effective tool for investigating physical phenomena that occur at extremely high pressure, such as high-transition temperature superconductivity. Electrical transport measurements, which are used to characterize one of the most important properties of superconducting materials, are difficult to perform using conventional DACs. The available sample space in conventional DACs is very small and there is an added risk of electrode deformation under extreme operating conditions. To overcome these limitations, we herein report the fabrication of a boron-doped diamond microelectrode and undoped diamond insulation on a beveled culet surface of a diamond anvil. Using the newly developed DAC, we have performed in-situ electrical transport measurements on sulfur hydride H2S, which is a well-known precursor of the pressure-induced, high-transition temperature superconducting sulfur hydride, H3S. These measurements conducted under high pressures up to 192 GPa, indicated the presence of a multi-step superconducting transition, which we have attributed to elemental sulfur and possibly HS2.
Electron diffraction by vacuum fluctuations
Authors: Di Giulio Valerio , de Abajo F Javier García
Published: October 2020

Vacuum fluctuations are known to produce electron diffraction leading to decoherence and self-interference. These effects have so far been studied as either an extension of the Aharonov–Bohm effect in front of a planar perfect conductor or through path integral analysis. Here, we present a simpler, general, and rigorous derivation based on a direct solution of the quantum electrodynamic aloof interaction between the electron and a material structure in the temporal gauge. Our approach allows us to study dissipative media, for which we show examples of electron wave function shaping due to the interaction with real-metal surfaces. We further present a proof of the relation between the phase associated with vacuum fluctuations and the Aharonov–Bohm effect produced by the image self-interaction that is valid for arbitrary geometries. Besides their fundamental interest, our results could be useful for on-demand patterning of electron beams with potential application in nondestructive nanoscale imaging and spectroscopy.
The Sensitivity Analysis in Topology Optimization of Hip Stem Prosthesis Using Finite Element Method
Authors: Huzni Syifaul , Tanamas M. Ilham , Fonna Syarizal , Ariffin A.K.
Published: October 2020

This paper discusses the results of the parameters employed sensitivity analysis in the optimization of hip stem prosthesis geometry using topology optimization techniques based on finite element methods. The study was carried out to examine the relationship of finite element parameters, such as mesh size and stress distribution, and topology optimization parameters, such as percent to retain, to the final geometry of the prosthesis stem. Topology optimization was performed using ANSYS software for hip stem prosthesis, a type of Anatomic Medullary Locking, made from titanium alloy. The results obtained from this study indicate that the selection of finite element parameters and topology optimization parameters will have a significant effect on the shape and geometry of the hip stem. The results of this analysis can be the basis for the development of hip stem shape and geometry through topology optimization techniques.
Study of suspended handle materials for reducing hand-arm vibration in backpack grass trimmer
Authors: Mubarak A Z , Razali A , Rizal M , Hambali K R
Published: October 2020

Backpack-type petrol-driven grass trimmers are a widely used grass trimmer. However, the high vibration on its handle causes machine operator to be at risk of “Hand Arm Vibration (HAV)” or vibration exposure on the arms that can damage the nervous system. This research aims to study the effect of suspended handle materials in reducing the vibration on the handle of the backpack-type grass trimmer. There are three types of materials used in this study, they are natural rubber, rubber silicone and foam EVA (Ethylene-vinyl acetate). The material is layered around the handle and then the vibration on the handle is measured. The result shows that foam EVA has better performance in reducing the vibration acceleration rather than natural rubber and rubber silicone.
Mapping Upstream and Downstream Process in The Patchouli Oil Industry Using Supply Chain Operations Reference Model Version 12.0 (SCOR 12.0)
Authors: Maizi Hazful , Yudie Sastra Hasan , Arhami
Published: October 2020

Supply chain characteristics in the agricultural industry differ from the industry in general, the structure is more complex and unique according to its agricultural commodities. All of the aspects starting from the upstream are very important to consider because of their dependence on the suitability of the environment and the processes that are carried out on the pre-source. Patchouli oil industry which is mainly located in Aceh Jaya Regency is the object of this study due to the fact it is the largest supplier of patchouli oil in Aceh Province. It is estimated that patchouli oil which is one of the superior local wisdom product is becoming an interesting subject again. This is indicated by several local products that use it as the main raw material. Certainly, this will be difficult to be applied if the supply chain from the upstream to the downstream is not evaluated and upgraded. For this reason, it is necessary to do a mapping process on the vulnerable side, including pre-source, source, make, and deliver. This mapping used the SCOR method version 12.0 and adapted to the make-to-stock industry scheme. The output of this study is a reliable and measurable process system in the patchouli oil industry.
The Ability of the Fast Fourier Transform to De-Noise a Strain Signal
Authors: Putra Teuku Edisah , Husaini  , Asrina Desy , Dirhamsyah Muhammad
Published: October 2020

This study aims to develop an algorithm for filtering the noise in the fast Fourier transform. It requires the determination of the cycles, based on the rain flow counting method. This design was further applied to remove the lower amplitude cycles in a 60-second strain signal. Therefore, the results indicated that the method was able to remove more than 10% of the lower amplitude cycles at a frequency of 45 Hz. The filtered strain signal maintained the fatigue damage by more than 90% and further upheld its original characteristics. This study concluded that the developed algorithm was able to identify and remove the noise contained in the strain signal.
A Review on Current Mill Liner Design and Performance
Authors: Usman Husni , Fonna Syarizal , Thalib Sulaiman
Published: October 2020

Milling management in Mining and Mineral Industries should keep on improving liner design based on operating experience, ore types, good design practice, and also additional data from ball trajectory and DEM simulations. The small-scale trials for evaluating different liner shapes would rather provide important basic information to industrial mills. The lifters with the same face angle, but different configurations could provide improvements in energy efficiency and performance. Integrating the wear rates of liners from the actual measurement of the changes in liner profile over milling time and also using laser-based thickness gauging technology would assist in establishing a more efficient liner profile.
Performance analysis using Fuzzy Balanced Scorecard-based performance prism
Authors: Purnomo M R A , Prayati K T
Published: October 2020

Managing an organisation without strategy is like as being blind in the world of globalisation. An organisation must formulate a new strategy and find out what parts or departments that should be prioritised to be improved more than others. To be able to formulate the new strategy that is adequate to improve employee performance, the company must be able to identify the source of the main problems that could be obstacles in improving employee performance. This paper presents development of hybrid method between Fuzzy Balanced Scorecard (FBSC) and Performance Prism (PP) to analyse performance of a company. This study took place at a multimedia company with big projects mostly from Indonesia and United States. Result of the study showed that the proposed hybrid method could be used to evaluate the company from 4 perspectives that are customer’s satisfaction, finance, internal business process and learning and growth in PP framework. The fuzzy logic was incorporated in an analytical hierarchy process (AHP) to determine weight for every perspective based on experts’ judgement. Result of this study showed that the investigated company has performance score very high that is 9.938, with the lowest score is employee stakeholder factor. With this result, the company would be able to track down the root cause of the problem and an effective strategic plan could be formulated in order to improve employee and overall company performance.
Analysis of of Consumer Preferences on Aceh Songket Product Using Conjoint Analysis (Case of Study: Banda Aceh City and Aceh Besar District)
Authors: Ilyas  , Zuhri S , Yusra E , Maydini CM , Erwan F
Published: October 2020

Indonesia as the country rich in cultural heritage, has a variety of characteristics including woven fabric. Songket fabric is one form of woven fabric that is owned by almost every region. Aceh is one of the best producing areas for songket because of its quality. However, the limitations of the songket design made songket fabric not develop as the expectation. Therefore, the innovation is needed based on the consumer preferences by combining songket with other products. This research aims to identify the consumer preferences toward the product. The method that was used to analyze consumer preferences was conjoint analysis. The results showed that there were five attributes that influenced consumers in choosing songket products based on the highest level of importance for each attributes which were basic color at 35,381%, type of motive at 26,650%, type of product at 16,195%, materials at 11,718% and motive color at 10,057% while the most preferred combination product based on the highest utility level results from the level of each attributes were clothing product at 0,089, with black as basic color at 0,110, gold color as color motive at 0,012, using polyester and embroidery as materials at 0,059 and pinto aceh as a motive 0,089.
EFFECT OF MOTOR VIBRATION PROBLEMS ON POWER QUALITY OF WATER PUMPING AT RESIDENCY
Authors: Dutta Nabanita , Kaliannan Palanisamy , Subramaniam Umashankar
Published: October 2020

Water pumping system is an essential machinery for residential usage. Around 150 litres of water are used by a person in India daily for their daily usage. For this reason the water pumping is used regularly. Due to dynamic performance of the pumping unit pump can be operated in both no load and load condition. Though the pumping system was controlled by throttling drive in the early stage but in modern technological advancement time pumps are controlled by variable frequency drives (VFD). VFD provides the pump variable duty requirements with significant energy saving and improved reliability. In every pumping system due to dynamic forces of hydraulic and mechanical component some vibrations are seen but sometimes this vibrations may be excessive which can damage the components of the pump. The excessive vibrations indicate some problems or failures in the system. Power quality issues are one of those problems which are seen during the vibration of the pump motor and induction motor connected with pump. This paper presents the power quality issues in the pump motor in different control method like vvc+ and v/f control method.
Resource assessment and energy yield estimation for 160 MW solar-wind hybrid project using system advisory model
Authors: Anilkumar G , Chakradhar A , Brahmendra Kumar G V , Palanisamy K
Published: October 2020

A techno-economic and environmental cost benefit analysis and assessment for the proposed 160 MW (Solar-120 MW and Wind-40 MW) hybrid renewable energy project with grid integration is carried out for electricity generation at Ramagiri & Muthavakuntla village locations of Anathapuram district in Andhra Pradesh state of India. Manual estimations are carried out based on recent research publications in similar line of studies and simulation studies are carried out using System Advisory Model (SAM) software under individual and hybrid operating modes with authenticated data resources to determine annual energy yield as well as sizing along with their economic and environmental concerns for solar and wind energy resources. Finally, comprehensive annual energy benefits are presented that shows techno-economic-environmental viability of this proposed project at the aforementioned location.
On line monitoring and control of grid-interfaced PV system using zigbee
Authors: Ramkumar R , Sivamani D , Preetha K , Shyam D
Published: October 2020

Grid connected photovoltaic system is used to watch the soundness and execution of the framework. The easiest strategy is to gather and transmit the information across information links. Customary wired checking framework gives dependable arrangement in information transmission yet experiences a few restrictions. The utilization of information links likewise builds establishment and upkeep cost. Information links are influenced by the sun pillar and downpour. Checking station should be found sensibly near the observing plant. To conquer these issue Zigbee based remote checking framework is created for web based observing of a lattice associated photovoltaic framework. A PC-based application coordinated with online capacity is planned and executed so as to permit controller of the framework just as simple access of the information over the web. Boundaries like temperature, illumination, PV power yield and framework inverter power yields are checked. To approve the presentation, the framework has been executed on 100Wp network associated photovoltaic framework.
Optical modeling and Performance Design Of A Fresnel Lens For CPV Units
Authors: Himer Sarah El , Ayane Salima Al , Ahaitouf Ali
Published: October 2020

In CPV technology, a focus on keeping low costs has led most recent designs to use concentration ratios of 1000X or higher. For that, many high-concentration photovoltaic systems use refractive Fresnel lenses because it is one of the main transmission-type concentrators. In this work, a solar concentrator system composed from a typical Fresnel lens made of PMMA, with an effective diameter of 350mm and a squared solar cell of 10x10mm is proposed. The design of a Fresnel lens is introduced; we studied and analysed a squared design configurations with multiple tuning of focal lengths, facet spacing and an extended range of wavelengths. The results show that the Fresnel lens is performant in the visible spectrum with facet spacing of 1mm and the focal length between 265 to 350mm. The acceptance angle of the whole system was between 0.6 to 0.8° and the optical efficiency obtained by simulations was between 80 to 90%.
Extended Boost DC-DC-AC Converter for Electric Vehicle Applications
Authors: Uthirasamy R. , Karpagam J. , Subramaniam Umashankar , Vijayalakshmi V.J.
Published: October 2020

In this paper, extended boost DC-DC-AC converter is proposed for Electric Vehicle (EV) applications. The extended boost DC-DC power converter overcomes the limitations of traditional voltage source and impedance source power converters. In addition to the DC-DC converters, charge storage systems are also evenly plays a pre-dominant role in EVs. This paper provides a comprehensible idea concerning the right selection of power converters, energy storage systems and electric drives systems. A wide research was made on electric vehicle models in the design phase, but most reached the prototype model with better efficiency. The electrical systems and combustion engines found in these vehicles are compared in order to forecast the evolution trend in terms of specifications and performance of the whole vehicle and of each system. The entire system is developed and simulated using SIMULINK tools. A prototype model of single phase extended boost DC-DC converter is developed and its results are validated.
Design and Simulation of Wind Turbine Blades
Authors: Kumar Swapnil , Dash Sitaram
Published: October 2020

A Wind Turbine Blade has been modelled in Solidworks and its simulation implemented in ANSYS frameworks. Structural, fatigue and Computational Fluid Dynamics (CFD) analysis has been carried out to determine the performance of this blade. The analysis incorporates a blade velocity of 100 m/sec. High Lift to Drag Parameter has been considered for obtaining optimal performance of this blade. The lift-to-drag ratio happens to be a key design parameter for benchmarking such blades. k-ε turbulent model was adopted for our CFD based simulation. Fine meshing was carried out for improving accuracy of results.
A Study on Optimization of Network latency and Pocket loss Rate
Authors: Krishanmoorthy Sujatha , Wei Zhangyu , Zhang Yihuai , Jin Hao , Dong Hao
Published: October 2020

Network delay refers to the transmission of various data in the network medium through network protocol, such as TCP / IP. If the amount of information is too large and there is no limit at the same time, the excessive network traffic will lead to the slow response of equipment, resulting in network delay. [2] The main causes of network delay are transmission delay, propagation delay, packet switching, queuing, packet drop and processing. [1]Therefore, in order to study the optimization of network delay, the causes of network delay was studied in detail. Some of the methods were deployed to learn the testing network latency, delay measurement algorithm, for example, Cristian’s Algorithm, network analysis by establishing a packet processing model, and TCP BBR algorithm and analyze the optimization of network delay through the simulation of BBR. Finally, by comparing the data before and after optimization, the results of the optimization of the network delay test data by the BBR algorithm are obtained.
Evaluation of photocatalytic activity of commercial red phosphorus towards the disinfection of E. coli and reduction of Cr (VI) under direct sunlight
Authors: Athira T K , Roshith M , Kadrekar R , Arya A , S Kumar Megha , Anantharaj Gopalraman , Gurrala Lakshmiprasad , Saranyan Vijayaraghavan , T G Satheesh Babu , Darbha V Ravi Kumar
Published: October 2020

Elemental photocatalysts are getting the attention of material scientists as a new class of visible light photocatalysts in recent years. Hence it is important to understand and evaluate their phtocatalytic activity for the rationale design and development of new catalysts at low cost. In this regard, we choose commercial red phosphorus as elemental photocatalyst and we evaluate its activity towards the disinfection of E. coli and reduction of Cr (VI) under natural sunlight. The measured bandgap of red phosphorus is 2.0 eV matches with theoretical value and indicates the suitability of the material as photocatalyst under direct sunlight. Moreover, red phosphorus also has optimum valence and conduction band levels for the successful photo-generation of reactive oxygen species (ROS). These photogenerated ROS could help to achieve the disinfection of E. coli in 50 min. In the case of photocatalytic reduction of Cr (VI), 98% of Cr (VI) reduction has been achieved is in 60 min at pH 2. The rate of Cr (VI) reduction decreases with an increase in pH value similar to the reports with other metal oxide photocatalysts.
Randomized Trial Evaluation of the Benefits and Risks of Menopausal Hormone Therapy Among Women 50–59 Years of Age
Authors: Prentice Ross L , Aragaki Aaron K , Chlebowski Rowan T , Rossouw Jacques E , Anderson Garnet L , Stefanick Marcia L , Wactawski-Wende Jean , Kuller Lewis H , Wallace Robert , Johnson Karen C , Shadyab Aladdin H , Gass Margery , Manson JoAnn E
Published: October 2020

The health benefits and risks of menopausal hormone therapy among women aged 50–59 years are examined in the Women’s Health Initiative randomized, placebo-controlled trials using long-term follow-up data and a parsimonious statistical model that leverages data from older participants to increase precision. These trials enrolled 27,347 healthy postmenopausal women aged 50–79 years at 40 US clinical centers during 1993–1998, including 10,739 post-hysterectomy participants in a trial of conjugated equine estrogens and 16,608 participants with a uterus in the trial of these estrogens plus medroxyprogesterone acetate. Over a (median) 18-year follow-up period (1993–2016), risk for a global index (defined as the earliest of coronary heart disease, invasive breast cancer, stroke, pulmonary embolism, colorectal cancer, endometrial cancer, hip fracture, and all-cause mortality) was reduced with conjugated equine estrogens with a hazard ratio of 0.82 (95% confidence interval: 0.71, 0.95), and with nominally significant reductions for coronary heart disease, breast cancer, hip fracture, and all-cause mortality. Corresponding global index hazard ratio estimates of 1.06 (95% confidence interval: 0.95, 1.19) were nonsignificant for combined estrogens plus progestin, but increased breast cancer risk and reduced endometrial cancer risk were observed. These results, among women 50–59 years of age, substantially agree with the worldwide observational literature, with the exception of breast cancer for estrogens alone.
Cognitive Functioning and Cortical Brain Thickness in Acromegaly Patients: A Pilot study
Authors: García-Casares Natalia , Fernández-Andújar Marina , González-Molero Inmaculada , Maraver-Selfa Silvia , Gutiérrez-Bedmar Mario , Ramos-Rodriguez José R , Alfaro-Rubio Francisco , Roé-Vellvé Nuria , Garcia-Garcia Isabel , García-Arnés Juan A
Published: October 2020

Objective

Cognitive effects in acromegaly patients are poorly understood and the mechanisms involved are still unclear. The aim of this study was to evaluate the cognitive function, depression, and quality of life of acromegaly patients treated with pegvisomant versus somatostatin analogues (SRLs) and to analyze the effect of the different treatments on cognition and possible structural brain changes.

Methods

This cross-sectional study involved 23 acromegaly patients divided into two groups according to treatment modality: One group of 9 patients treated with pegvisomant and another group of 14 patients treated with SRLs. All participants underwent blood analysis, neuropsychological tests, depression tests, quality of life assessment, and 3-Tesla magnetic resonance imaging.

Results

We found no significant differences between groups in the neuropsychological tests, depression or quality of life; nor in the whole-brain cortical thickness. In the SRL group, the volume of the thalamus correlated positively with executive function, a correlation not found in the pegvisomant group. In addition, the pegvisomant group had significantly higher levels of insulin than the SRL group.

Conclusions

In conclusion, in this pilot study, the type of pharmacological treatment in patients with acromegaly and good glycemic control did not influence the cognitive function and cortical brain thickness. However, pegvisomant could play a neuroprotective role on the thalamus that will have to be demonstrated with larger samples in future studies.
Somatic variant analysis of linked-reads sequencing data with Lancet
Authors: Musunuri Rajeeva , Arora Kanika , Corvelo André , Shah Minita , Shelton Jennifer , Zody Michael C , Narzisi Giuseppe
Published: October 2020

We present a new version of the popular somatic variant caller, Lancet, that supports the analysis of linked-reads sequencing data. By seamlessly integrating barcodes and haplotype read assignments within the colored De Bruijn graph local-assembly framework, Lancet computes a barcode-aware coverage and identifies variants that disagree with the local haplotype structure.

Availability and implementation

Lancet is implemented in C++ and available for academic and non-commercial research purposes as an open-source package at https://github.com/nygenome/lancet.

Supplementary information

Supplementary data are available at Bioinformatics online.
From biomechanics to pathology: predicting axonal injury from patterns of strain after traumatic brain injury
Authors: Donat Cornelius K , Yanez Lopez Maria , Sastre Magdalena , Baxan Nicoleta , Goldfinger Marc , Seeamber Reneira , Müller Franziska , Davies Polly , Hellyer Peter , Siegkas Petros , Gentleman Steve , Sharp David J , Ghajari Mazdak
Published: October 2020

The relationship between biomechanical forces and neuropathology is key to understanding traumatic brain injury. White matter tracts are damaged by high shear forces during impact, resulting in axonal injury, a key determinant of long-term clinical outcomes. However, the relationship between biomechanical forces and patterns of white matter injuries, associated with persistent diffusion MRI abnormalities, is poorly understood. This limits the ability to predict the severity of head injuries and the design of appropriate protection. Our previously developed human finite element model of head injury predicted the location of post-traumatic neurodegeneration. A similar rat model now allows us to experimentally test whether strain patterns calculated by the model predicts in vivo MRI and histology changes. Using a controlled cortical impact, mild and moderate injuries (1 and 2 mm) were performed. Focal and axonal injuries were quantified with volumetric and diffusion 9.4 T MRI at 2 weeks post injury. Detailed analysis of the corpus callosum was conducted using multi-shell diffusion MRI and histopathology. Microglia and astrocyte density, including process parameters, along with white matter structural integrity and neurofilament expression were determined by quantitative immunohistochemistry. Linear mixed effects regression analyses for strain and strain rate with the employed outcome measures were used to ascertain how well immediate biomechanics could explain MRI and histology changes. The spatial pattern of mechanical strain and strain rate in the injured cortex shows good agreement with the probability maps of focal lesions derived from volumetric MRI. Diffusion metrics showed abnormalities in the corpus callosum, indicating white matter changes in the segments subjected to high strain, as predicted by the model. The same segments also exhibited a severity-dependent increase in glia cell density, white matter thinning and reduced neurofilament expression. Linear mixed effects regression analyses showed that mechanical strain and strain rate were significant predictors of in vivo MRI and histology changes. Specifically, strain and strain rate respectively explained 33% and 28% of the reduction in fractional anisotropy, 51% and 29% of the change in neurofilament expression and 51% and 30% of microglia density changes. The work provides evidence that strain and strain rate in the first milliseconds after injury are important factors in determining patterns of glial and axonal injury and serve as experimental validators of our computational model of traumatic brain injury. Our results provide support for the use of this model in understanding the relationship of biomechanics and neuropathology and can guide the development of head protection systems, such as airbags and helmets.
Clinical Utility of In-house Metagenomic Next-generation Sequencing for the Diagnosis of Lower Respiratory Tract Infections and Analysis of the Host Immune Response
Authors: Chen Hongbin , Yin Yuyao , Gao Hua , Guo Yifan , Dong Zhao , Wang Xiaojuan , Zhang Yawei , Yang Shuo , Peng Qiusheng , Liu Yudong , Wang Hui
Published: October 2020

Background

Only few pathogens that cause lower respiratory tract infections (LRTIs) can be identified due to limitations of traditional microbiological methods and the complexity of the oropharyngeal normal flora. Metagenomic next-generation sequencing (mNGS) has the potential to solve this problem.

Methods

This prospective observational study sequentially enrolled 93 patients with LRTI and 69 patients without LRTI who visited Peking University People’s Hospital in 2019. Pathogens in bronchoalveolar lavage fluid (BALF) specimens were detected using mNGS (DNA and RNA) and traditional microbiological assays. Human transcriptomes were compared between LRTI and non-LRTI, bacterial and viral LRTI, and tuberculosis and nontuberculosis groups.

Results

Among 93 patients with LRTI, 20%, 35%, and 65% of cases were detected as definite or probable pathogens by culture, all microbiological tests, and mNGS, respectively. Our in-house BALF mNGS platform had an approximately 2-working-day turnaround time and detected more viruses and fungi than the other methods. Taking the composite reference standard as a gold standard, it had a sensitivity of 66.7%, specificity of 75.4%, positive-predictive value of 78.5%, and negative-predictive value of 62.7%. LRTI-, viral LRTI–, and tuberculosis-related differentially expressed genes were respectively related to immunity responses to infection, viral transcription and response to interferon-γ pathways, and perforin 1 and T-cell receptor B variable 9.

Conclusions

Metagenomic DNA and RNA-seq can identify a wide range of LRTI pathogens, with improved sensitivity for viruses and fungi. Our in-host platform is likely feasible in the clinic. Host transcriptome data are expected to be useful for the diagnosis of LRTIs.