bluuebunny/crossref_metadata_2025_split huggingface dataset:
Achieving Lean and Improving Sustainability through Value Stream Mapping for Complex Manufacturing
Authors: Samant S , Prakash R 
Published: February 2020

Abstract
Lean manufacturing has helped companies to achieve reduced lean wastage, productivity, quality, and resource optimization. Value stream mapping (VSM) is an important tool in achieving lean orientation. It helps companies in enhancing the competitiveness of their production systems. Although, VSM is a very useful tool to achieve lean orientation, it suffers from several drawbacks. It is static pencil-and-paper tool. It cannot handle complex value streams. It does take into account monetary measures e.g. profitability of the value stream. Also, it does not include environmental impact of the value stream. This research paper overcomes the drawbacks of the VSM tool through an innovative framework involving the usage of discrete event simulation, box score, and life cycle assessment (lca).
Effect of microcapsules addition on impact properties of carbon fiber reinforced polymer and glass fiber reinforced polymer composites
Authors: Priya Jhanji Kanu , Asokan R , Amit Kumar R , Sarkar Shivanshu , Mahathi Guptha K , Kumar Sathish 
Published: February 2020

Abstract
Fiber reinforced composites are ubiquitous in the aerospace and automobile industries due to their significant superior characteristics such as strength to weight ratio, corrosion resistance, fatigue resistance, specific strength and specific modulus. Impact is common kind of damage found in aircraft and automobile structures. The cause of damage may be sudden strike from a bird, falling of tool during servicing or striking of debris during transportation. Hence, predicting the behavior of composites under impact is necessary and also some mechanism to repair these damages should be found. So, this work aims at determining the effect of inclusion of microcapsules containing healing agents on impact behavior of Fiber Reinforced Polymer (FRP) composite. The resin stuffed and hardener stuffed microcapsules were prepared by in-situ polymerization. These capsules of diameter ranging from 0.19 µm to 0.30 µm were mixed in epoxy resin system during the manufacturing of FRP laminates. Experimental investigation was performed under ambient conditions to observe the variation in impact properties of Carbon Fiber Reinforced Polymer (CFRP) and Glass Fiber Reinforced Polymer (GFRP) composites. It was observed that value of peak load was boosted with addition of capsules and more energy was absorbed during elastic deformation and less during plastic deformation. Also, partial healing was observed due to addition of capsules at 2.5 wt. %.
Model Prediction of Microcantilever using DOE for Stress and Eigen Frequency Analysis for Force Measurement
Authors: Lamba Monica , Nag Meetu , Chaudhary Himanshu , Singh Kulwant 
Published: February 2020

Abstract
In this paper, stress and eigen frequencies are analyzed through prediction of microcantilever model using design of experiment approach. The important factors affecting displacement sensitivity, stress and eigen frequencies were identified such as geometrical dimensions of microcantilever (length, breadth and thickness), modulus of elasticity of materials, applied force. Based on the selection of factors and levels, experiments were designed using L9 orthogonal array. The designed experiments were simulated with finite element method in COMSOL Multiphysics software. Further, optimum values of dimensions of microcantilever and material property are used for stress and eigen frequencies analysis. The evaluated frequencies under eigen frequency analysis revealed that designed and simulated Gallium Arsenide (GaAs) microcantilever is prone to vibrate at these frequencies, whereas stress analysis illustrates the response of structure and material properties towards reliability.
Optimization of Process Parameters on CNC milling machine for Mild steel IS 2062:2011 E250 Gr. A with AlTiN coated tool insert in wet condition
Authors: Nadaf Sumaiyya S. , Shinde Prof. Mrs. Minakshi Y. 
Published: February 2020

Abstract
Now a days manufacturing industries wants to increase the quality of product and reduce manufacturing cost. The aim of this project work is to reduction of energy consumption during the machining phase, reduce surface roughness and increase material removal rate by optimization of face milling process parameters of mild steed IS 2062:2011 E250 Gr A with Taguchi orthogonal array. 27 experimental runs based on L27 orthogonal array of Taguchi method were performed. Spindle speed, feed rate and depth of cut this process parameters are optimized with multiple performance characteristics such as surface roughness (Ra), Material removal rate (MRR) and power consumption. The machining operation performed on VMC by using coolant with 63 mm cutter diameter. The analysis of variance (ANOVA) is also applied to identify the most significant factor using Minitab software. The analysis can be done on AlTiN insert coating. At the last conformation test were performed.
Tracking Error Fitness Function V/F Control of Micro-Grid Based on Genetic Algorithm
Authors: Ma Leiming , Xiao Lingfei , Xu Min 
Published: February 2020

Abstract
This paper presents a method of V/f control parameters tuning for micro-grid based on genetic algorithm. Firstly, the fitness function which representing the tracking error of V/f control system in micro-grid is established. The solving path of genetic algorithm is optimized by using the offset threshold condition between the output voltage and the instruction voltage of the load side, leading to that the individuals with high priority will tend to the optimal solution in the target solution, obtaining the global optimal V/f control parameters. Secondly, the frequency domain response characteristics of equivalent output impedance of V/f control system are analyzed, and the influence of PI parameters on the whole control system is compared. The results shows that the V/f control parameters tuning based on genetic algorithm with the tracking error fitness function can effectively guarantee a constant output of micro-grid’s voltage and frequency. The effectiveness and the advantages of the method is verified by simulation result, which indicated that the proposed method is easy to implement and has a wide range of applications.
A Numerical Relay Implementation for Overcurrent Protection Based on ARM Cortex – M4 Microprocessor
Authors: Nguyen Anh V , Nguyen Lien B , Hoang Anh 
Published: February 2020

Abstract
Numerical overcurrent protection relays are the most extensively used devices to safeguard the power system from detrimental faults which might lead to a catastrophe. This paper presents a practical implementation of a numerical overcurrent protection relay based on ARM Cortex – M4 microcontroller embedded with a floating-point unit which has ability to perform complex calculation operations with a great accuracy for real-time protection algorithms. In order to implement, the system is designed to capture analog values of input currents by using Hall current sensors, analog conditioning circuits and 12 – bit A/D converters. Based on the measured input current values, a real-time signal processing algorithm for overcurrent protection is applied to produce an inverse - time characteristic according to the IEEE Standard C37.112-1996. The experimental results demonstrate that our numerical relay produces great performances in the real-time and has ability to protect electrical components from exceeded current faults satisfying the IEEE standard for overcurrent relays.
Simulation of Internal and External Electric Field of UHV DC Polar Bus Arrester under Pollution Conditions
Authors: Zhang Pipei , Shi Wei , Li Jie , Sun Jingwen , Wang Peng 
Published: February 2020

Abstract
Due to the adsorption effect of DC electric field on pollution particles, the pollution accumulation of DC arrester is more serious than that of AC arrester. In addition, the UHV DC polar bus arrester also has a parallel resistance pole inside, the external electric field and the internal radial electric field will be affected by the pollution distribution. In this paper, the electric field simulation model of UHV DC polar bus arrester under the condition of pollution was established, which was used to calculate and analyze the electric field on the surface of the insulating coat and the radial electric field between the resistance pole and the insulating coat when the overall pollution and the local dry belt of the arrester occur. The results showed that the overall pollution of the arrester would lead to the increase of the surface field strength and the internal radial field strength. While the value was small, it would not cause corona and flashover. When the partial dry belt occurred, it would form the partial high surface field strength and radial field strength on the surface of skirt and the air gap between the resistance piece and the insulating coat, which would cause flashover on the surface of the insulating jacket, corona discharge and penetration discharge between the resistance piece column and the insulating coat.
Research on Calibration Method of Temperature Field for Large Sealed High Temperature Equipment
Authors: Zhe Wang , Yao-yao Cui , Song-lin Yu , Ying Fan , Hao Sun , Xiao-dan Wang 
Published: February 2020

Abstract
Large sealed high temperature equipment usually refers to heat treatment equipment with a volume of more than 0.15m3, sealed structure and internal heating and constant temperature function. It is widely used in the fields of biochemistry, chemical pharmacy, medical and health, agricultural research, automobile and military industry. It`s a very important processing equipment. The accuracy of temperature field and vacuum sealing directly affect the quality of products. Taking the hot-pressing tank as an example, the furnace temperature tracker and wireless pressure module are used to calibrate it on the spot. According to the calibration results of temperature field distribution and temperature field performance, whether it meets the process requirements is analyzed.
Reproducibility of superhydrophobic and oleophobic polymeric micro surface topographies
Authors: Baldelli Alberto , Bschaden Ben , Amirfazli Alidad , Sameoto Dan 
Published: February 2020

Abstract
Micro-structured surfaces can provide useful material properties, such as repellency to water, oil, or alcohols. Multiple polymers were investigated based on micro molding replication fidelity of repellent structures using both advancing and receding contact angle measurements. Five different polymers (Loctite 3525, ST-1060, TC-854, TC-8740, and Teflon AF) were chosen based on a range of durometers, for each of which, a recommended curing process was presented. These polymers were micro-structured via a one-step replica molding to create mushroom shaped fibers with overhanging caps. Teflon AF, a low surface energy polymer, produced innovative superhydrophobic as well as oleophobic Micro Surface Topographies (MSTs). Advancing contact angles (CAs) of these microstructures were 166 ± 4.2, 151 ± 2.9, and 119 ± 2.2 when in contact with a water, ethylene, and olive oil droplet respectively. The highest reproducibility was achieved by using a curing procedure of 100 °C for 2 h. However, even in these conditions, 35% of MSTs were not fully reproduced. ST-1060 was considered a good alternative to Teflon AF since, even after five uses of the same casting mold, the advancing CAs decreased less than 2% when in contact with any liquid tested. Polymeric MSTs resistance to an external force was also examined using a gyratory shaker suggesting that softer materials, such as ST-1060, were required to survive exposure to environmental conditions.
Comparative study for seed layer solvent effects on structural and optical properties of MgZnO thin films deposited by chemical bath deposition technique
Authors: Baig Faran , Asif Ali , Ashraf Muhammad Waseem , Imran Muhammad 
Published: February 2020

Abstract

C-axis oriented Magnesium doped Zinc Oxide (MgZnO) thin films are promising candidates for variety of applications especially optoelectronic devices. In this work, the effects of seeding solvents on structural and optical properties of MgZnO films were analyzed. The comparison was performed by varying the seed layer solvent i.e. 2-Methoxyethanol, 2-Propanol, Ethanol and Methanol. MgZnO thin films were synthesized on different seed layered glass substrates using Chemical Bath Deposition (CBD) method. The XRD results revealed the hexagonal wurtzite structure for all samples. However, the film with seed layer 2-Methoxyethanol solvent had preferred c-axis orientation and better crystallanity. For 2-Methoxyethanol solvent based seed layer: the morphological study showed wrinkled free, unfractured and highly aligned MgZnO nanorods grown perpendicular to the substrate. Energy dispersive x-ray (EDS) spectroscopy confirmed the presence of magnesium in ZnO film. Highest average transmittance of

80
%

and band gap value of

3.3

eV

was recorded through UV–vis spectroscopy. The optical constants (refractive index and extinction coefficient) were determined by reflectance and absorbance data. Furthermore complex dielectric constant and energy loss functions were estimated.
Influence of the sputtering glancing angle on the microstructure and adsorption characteristics of Zr-Co-RE getter films
Authors: Zhou Chao , Li Detian , Zhou Hui , Liu Xingguang , Ma Zhanji 
Published: February 2020

Abstract
Zr-Co-RE non-evaporable getter films have excellent gas adsorption performance therefore can be used in vacuum sealed electronic devices. The microstructure of getter films has vital effect on adsorption performance. In this paper, Zr-Co-RE films deposited by DC magnetron sputtering at different glancing angles are investigated including microstructures and adsorption characteristics. The surface and cross-sectional morphologies demonstrate loose, porous and columnar-like structure which forms because of low lateral mobility of Zr and Co atoms and shadowing effect of non-perpendicular sputtering. Zr-Co-RE films are amorphous or nanocrystalline structure. The films deposited at 90° glancing angle show large grain size. After Zr-Co-RE films are heated at 350 °C for 15 min, the H2 adsorption capacity and pumping speed at ambient temperature are tested. The films grown at 90° glancing angle have highest initial pumping speed (103.9 ml s−1 cm−2), which owe to its more gas diffusion path and active surface, meanwhile, the adsorption capacity is lower than 60° because of difficult and limited diffusion process into getter matrix. The films grown at 60° glancing angle have best adsorption capacity (71.5 Pa.ml cm−2) and pumping speed stability.
Development of FAIR conductor and HTS coil for fusion experimental device
Authors: Mito Toshiyuki , Onodera Yuta , Hirano Naoki , Takahata Kazuya , Yanagi Nagato , Iwamoto Akifumi , Hamaguchi Shinji , Takada Suguru , Baba Tomosumi , Chikumoto Noriko , Kawagoe Akifumi , Kawanami Ryozo 
Published: February 2020

Abstract
This study is aimed at the development of high-temperature superconducting (HTS) magnets for application in a fusion experimental device next to the Large Helical Device (LHD). By applying the features of an HTS, high current density and high stability can be balanced. As a candidate conductor, REBCO tapes and pure aluminum sheets are laminated and placed in the groove of an aluminum alloy jacket with a circular cross-section, after joining a lid to the jacket using friction stir welding, and twisting the conductor to homogenize its electrical and mechanical properties. The FAIR conductor derives its name from the processes and materials used in its development: Friction stir welding, an Aluminum alloy jacket, Indirect cooling, and REBCO tapes. Initially, the degradation of the critical current of the FAIR conductor is observed, which was eventually resolved. The development status of the FAIR conductor has been reported.
A morphometric and molecular phylogenetic analysis of the African orchid genusStenoglottis(Orchidaceae: Orchidoideae)
Authors: Phillips Dean P , Bytebier Benny 
Published: February 2020

AbstractStenoglottis is a small genus of forest orchids endemic to continental Africa. Nine taxa have so far been described, but species boundaries in the genus are problematic and several of these taxa are not widely accepted. In this study, taxon boundaries were investigated by means of a combination of morphometric and phylogenetic analyses, with the aim of resolving species-level relationships and identifying practical diagnostic characters. Sequence variation was low, particularly in plastid DNA (atpI-atpH), and Bayesian inference and maximum likelihood analyses of nuclear markers (ITS and ETS) did not resolve all of the putative taxa. Multivariate morphometrics (PCA, PCoA, cluster analysis) likewise did not support the recognition of all described Stenoglottis taxa, but they reliably distinguished some taxa that DNA data did not. Combined morphological and phylogenetic evidence supports the delimitation of five species and two varieties, for which characteristics of floral spurs, labella, leaves, bracts and auricles provide reliable diagnostic traits. These findings will form the basis of a taxonomic revision in which the proposed changes will be formalized.
An Interdependence Theory of Wedge Strategies
Authors: Huang Yuxing 
Published: February 2020

Abstract
A wedge strategy is a state’s attempt to prevent, break up, or weaken a threatening or blocking alliance. An asymmetric alignment consists of a great power (the alignment leader) and a small/middle power (the weaker ally). So when does the wedge strategy of a great power (a divider) towards a competitive asymmetric alignment work? I propose, based upon the ‘Crawford–Izumikawa debate’, an ‘interdependence theory’ of wedge strategies. In the case of an asymmetric alignment that is symmetrically interdependent, the wedge strategy of a divider that accommodates the weaker ally is most likely to succeed. However, a wedge strategy towards an asymmetric alignment that is asymmetrically interdependent is highly likely to fail. I evaluate the theory based upon four wedge strategies adopted in Cold War Asia through analysing American, Russian, and Chinese archival sources. As asymmetrically interdependent, the US–Japan and US–Taiwan alliances offset the impact of Chinese wedge strategies. Between 1955 and 1965, therefore, neither Chinese accommodation nor Chinese pressure could detach weaker American allies from the United States in East Asia. However, China successfully exploited the symmetric interdependence of the US–Pakistan alliance. Between 1962 and 1965, China’s accommodation of Pakistan prevented Pakistan from being used as an American base for containment purposes. Likewise, the Soviet Union took full advantage of the Sino–Vietnamese alignment’s symmetric interdependence, whereby Soviet aid to North Vietnam caused rifts in Sino–Vietnamese relations that eventually wrecked the Sino–Vietnamese alignment. According to the theory, therefore, given the asymmetric interdependence of the hub-and-spokes system, any Chinese attempts to weaken US-sponsored alliances in East Asia would not be effective.
Overlap in reproductive phenology increases the likelihood of cavity nest usurpation by invasive species in a tropical city
Authors: Diamond Joshua M , Ross Michael S 
Published: February 2020

Abstract
Multiple invasive cavity-nesting bird species can be present in a nest web, the network linking birds using cavities. We investigated the nest preferences and breeding phenologies of the cavity-nesting guild in the region surrounding Miami, Florida, USA, where invasive starlings, mynas, and parrots potentially usurp cavities from native woodpeckers and secondary cavity-nesters. We asked if the timing of reproduction determines which invasive species will usurp cavities from native birds with similar nest preferences. Nest usurpations between European Starlings (Sturnus vulgaris) and the woodpecker species present in Miami is well documented, but we predicted that a recently arrived sturnid species and introduced psittacids would also usurp nests. European Starlings had the largest breeding population of any species in our nest web, breeding during the peak of nesting season, and usurped the largest number of active nest cavities. We found that a small population of Common Mynas (Acridotheres tristis) usurped nests, sharing the peak-season nesting period with starlings and native woodpeckers. Parrots bred later than we expected, avoiding nest-site overlap with similarly large native birds that use cavities with similar characteristics. Parrots did not usurp any active nest cavities from native birds. Our results demonstrate how to use analysis of cavity characteristics and reproductive timing to evaluate threats to a cavity nest web posed by multiple invasive species. Common Myna currently usurp few nests; if they increase greatly in population, they could pose a problem for native cavity-nesters.
Immunological Variables Associated With Clinical and Endoscopic Response to Vedolizumab in Patients With Inflammatory Bowel Diseases
Authors: Coletta Marina , Paroni Moira , Alvisi Maria Francesca , De Luca Matilde , Rulli Eliana , Mazza Stefano , Facciotti Federica , Lattanzi Georgia , Strati Francesco , Abrignani Sergio , Fantini Massimo Claudio , Vecchi Maurizio , Geginat Jens , Caprioli Flavio 
Published: February 2020

AbstractBackground and AimsVedolizumab [VDZ] is a monoclonal antibody directed against the α4β7 integrin heterodimer, approved for patients with inflammatory bowel diseases [IBD]. This study aimed at identifying immunological variables associated with response to vedolizumab in patients with ulcerative colitis [UC] and Crohn’s disease [CD].MethodsThis is a phase IV explorative prospective interventional trial. IBD patients received open-label VDZ at Weeks 0, 2, 6, and 14. Patients with a clinical response at Week 14 were maintained with VDZ up to Week 54. At Weeks 0 and 14, their peripheral blood was obtained and endoscopy with biopsies was performed. The Week 14 clinical response and remission, Week 54 clinical remission, and Week 14 endoscopic response were evaluated as endpoints of the study. The expression of surface markers, chemokine receptors, and α4β7 heterodimer in peripheral blood and lamina propria lymphocytes was assessed by flow cytometry. A panel of soluble mediators was assessed in sera at baseline and at Week 14 by 45-plex.ResultsA total of 38 IBD patients [20 UC, 18 CD] were included in the study. At Week 14, the clinical response and remission rates were 87% and 66%, respectively. Higher baseline levels of circulating memory Th1 cells were strongly associated with clinical response at Week 14 [p = 0.0001], whereas reduced baseline levels of lamina propria memory Th17 and Th1/17 cells were associated with endoscopic response. Immunological clusters were found to be independently associated with vedolizumab outcomes at multivariable analysis. A panel of soluble markers, including IL17A, TNF, CXCL1, CCL19 for CD and G-CSF and IL7 for UC, associated with vedolizumab-induced Week 54 clinical remission.ConclusionsThe results of this exploratory study uncovered a panel of circulating and mucosal immunological variables associated with response to treatment with vedolizumab.