bluuebunny/crossref_metadata_2025_split huggingface dataset:
Seismic analysis of tall concrete and steel diagrid structure using response spectrum and time history method in e-tabs
Authors: Satya Sai Kiran Chowdary M , Himath Kumar Y , Lingeshwaran N 
Published: June 2021

Abstract
In the recent years due to lack of land the construction of high rise buildings widely increases and these buildings are affected by lateral loads due to wind or earthquake. To resist these horizontal loads lots of construction methods are available. Herein system peripheral columns of the building are eliminated.To resist the seismic forces we arrange the diagonal columns. In this study seismic performance of 20-story concrete and steel diagrid structures are assessed using response spectrum method. Only for concrete diagrid structure using time history method. The present work is made for studying the response and time period with acceleration of high rise building with concrete and steel diagrid structural system. To this aim response of two different diagrid structures of G+20 storey are carried out to obtain optimized position of diagrid. E-Tabs software mainly focus on seismic analysis of response spectrum and time history method. As per IS456:2000 and IS800:2007 all structural members of diagrid model are designed and IS1893:2002 and ASCE7-10 is considered for seismic analysis for concrete and steel diagrid structure. An evaluation of constraints storey shear, storey drift, storey displacement, Time period and Structural weight is done to determine the efficient and cost effective structure. The analysis of the building is carried out by using ETABS software.
Dynamic analysis of laminated composite sandwich plates with a circular hole
Authors: Kumar Deepak , Kallannavar Vinayak , Kattimani Subhaschandra , Rajendra Prasad Reddy B. 
Published: June 2021

Abstract
The current manuscript pacts the finite element investigation of the modal characteristics of the laminated composite sandwich (LCS) plate containing a circular hole. A series of simulations are executed to examine the influence of fiber orientations, edge constraints, the ratio of the thickness of core to face sheet, the radius of hole, and location of the hole on the system on the frequency response of the system. The analysis are carried out using ANSYS simulation tool
Parametric analysis of hole circularity for laser percussion drilling of carbon fibre reinforced plastic using Nd: YAG laser
Authors: Mishra Yadvendra Kumar , Mishra Sanjay , Jayswal S C , Suryavanshi Ajay 
Published: June 2021

Abstract
Holes of diameter less than 1 mm has wide application of manufacturing sector. Laser beam can be conveniently used for creation of such hole in different materials. The Carbon Fiber Reinforced Composite (CFRP) is quickly replacing the conventional materials in most of the engineering applications. Therefore, a detail parametric study to analyse the influence of factors like laser current, laser interaction time, pressure of assist gas, workpiece thickness and incidence angle on the geometrical accuracy of hole in terms of hole circularity at top (HCT) has been explored by changing the individual contributing factors. Small holes (< 1mm) have been fabricated with Nd: YAG laser of millisecond pulse duration in CFRP workpiece of thickness 1mm, 3mm, and 5 mm. It was observed that hole circularity at top surface is highest for zero angle of incidence. The increase of laser current, interaction time, and pressure of assist gas increases the HCT when the laser direction is normal to the workpiece whereas it shows a decline trend when the angle of incidence of 10° and 20°g;. The increase of workpiece thickness reduces the HCT irrespective of angle of incidence.
Palm oil fuel ash as partial substitute to cement in concrete: performance at elevated temperatures
Authors: Narayana Rao U.V. , Venkata Sairam Kumar N. 
Published: June 2021

Abstract
In this paper, the palm oil fuel ash (POFA) concrete is produced using POFA as partial replacement to ordinary Portland cement (OPC 53 grade) (0%-P0, 20%-P20, 40%-P40 and 60%-P60) by weight. The POFA concrete specimens are subjected to elevated temperatures of 200°C, 400°C and 800°C for duration of 2 hours. The compressive strength, ultrasonic pulse velocity (UPV) and mass loss (%) of POFA concrete are evaluated. The results indicate that the compressive strength is enhanced by the use of POFA in concrete. At elevated temperatures, POFA concrete showed higher resistance than P0 concrete (control concrete) and P20 concrete showed best performance in POFA concrete, when subjected to elevated temperatures. From the experimental results, it can be observed that 20% POFA can be used as partial replacement to cement in producing sustainable concrete.
Optimization of structural health monitoring attributes under variable failure rate condition using teaching learning based optimization and multiple regression
Authors: Khaira Ashish , Dwivedi Ravi K. , Jain Sanjay 
Published: June 2021

Abstract
The manufacturing industries prefer to use exponential equations for evaluating reliability, failure rate, etc., while assuming failure rate constant, but in real life failure rate is not always constant. This research work proposes a novel combination of Multiple Regression and Teaching Learning Based Optimization (TLBO). This work starts with regression modeling, to form an objective function from available data; secondly TLBO technique used, to obtain optimum values of structural health monitoring (SHM) attributes through cost minimization and finally, Weibull analysis to check the effect of optimum values of SHM attributes on β. The final results indicated that the β parameter reduces, which symbolized reduction in failure rate & SHM cost and, improvement in system reliability, thus validates the adopted methodology of combing multiple regression with TLBO, thus success of this work become the backbone for intelligent structures for SHMsystem.
Polymer nanocomposites with nanostructured copper flakes for protection as barrier in packaging materials in food industry
Authors: Karbari Sudha R , Prasad Shetty Kiran Guru , Desai Nivedita S 
Published: June 2021

Abstract
Polymer nanocomposites as multilayered and single layer are used as barrier protection for the entry of UV and moisture. Here the polymer nanocomposites with novel nanoflakes are simulated with the optimized geometry of nanoflakes. The barrier properties are verified with the change in width of the dispersed nanoflakes of polymer matrix. The optimization of the copper nanoflakes is investigated and studied using two model with different dimensions of the nanoflakes in the polymer nanocomposite. The diffusivity flux at the interface of air and the polymer matrix varies from 5×10-12 mol/(m 2s) and 4 ×10 -5 mol/(m 2s) for the models proposed.
Effect of notch fillet radius on tensile strength of 817M40 notched bar
Authors: Singh Aditya , Chauhan Premanand S , Pandit Prem Prakash , Narwariya Manoj 
Published: June 2021

Abstract
817M40 steel is a popular grade of hardening alloy steel to its excellent machinability. It is manufactured the mechanical components like gears, shafts, studs and bolts. Its hardness in the range of 248/302 HB. In this paper, notch fillet radius effect on tensile loading was investigated. U-shaped notched bars with three different kinds of notch were employed for tensile testing specimens. The changing the notch root radius and keeping the gross diameter, net diameter and notch depth same for all the notches. The notch root radius is varied as 0.5, 1.0 and 1.5 mm. The experimental results were validated with simulation result conduction on Finite Element Tool ANSYS Workbench. Authors belief that different notch fillet radius may have significant impact on tensile strength.
Investigating the influence of single-pass and double-pass friction stir processing on mechanical and wear behaviour of AA5083/Al2O3 surface
Authors: Bharti Shalok , Ghetiya Nilesh D. , Patel Kaushik M. , Dutta Varun 
Published: June 2021

Abstract
Friction Stir Processing (FSP) has established itself as an efficient technique to manufacture surface composite. Since the development of FSP, a variety of surface composite coatings have been produced with the help of this technique. Surface composite provides an enhancement in the material’s properties by providing a coating layer of composite material on the parent material. Various FSP process parameters can affect the produced surface composite and its properties. One of the important FSP parameters includes the number of passes over the surface of a material. In this paper surface composite of AA5083/Al2O3 was produced using FSP. Single-pass and double pass FSP were employed to understand its effect on microhardness, tensile strength, microstructure coefficient of friction, and wear rate. It was observed that the double pass aided to produce the homogeneously dispersed reinforcement particles in the surface composite along with fine grain microstructure. FSP helped to enhance the microhardness from 79.5 HV in the parent material to 136.5 HV in double pass FSP. Moreover, FSP helped to increase the tribological properties after two passes. However, the ultimate tensile strength was reduced after FSP.
Design and optimization of piezo resistors for a graphene based MEMS ICP sensor
Authors: Karbari Sudha R , Vahvale Yathish D , Kumar Karthik 
Published: June 2021

Abstract
Modeling and simulation of MEMS Intracranial pressure sensor using Graphene as the structural layer is defined. At normal health condition, the ICP pressure is in the range of 10-15 mmHg. Any variation from this range will signify the abnormalities such as neural system malfunction, nausea, vomiting, paralysis, brain tumor rupturing, and excitement.For Intracranial pressure sensing applications, to measure this slight variation of pressure a sensor having high sensitivity need to be employed and is solely depends on membrane used. properties of high young’s modulus, high thermal stability and electrical conductivity, inertness and zero band gap made it biocompatible to fabricate Intracranial piezoresistive pressure (ICP) sensor with membrane as graphene. COMSOL Multiphysics tool which is a finite element analysis (FEA) is deployed to optimize the dimensions and parameters for using graphene as a structural layer for pressure sensor diaphragm. A variability study of piezo resistors with three different meander shape are designed and simulated in COMSOL. The optimum design is further analyzed for three different type of pressure sensor specifications as conventional, with n-type dopant and graphene as a structural layer. The design with three meander resistance and graphene as a structural layer provides a strain induced of 0.14 with the pressure input of 10 mmHg.
Material Selection for Vertical Axis Tidal Current Turbine using Multiple Attribute Decision Making (MADM)
Authors: Musabikha S , Pratikno H , Utama I K A P , Mukhtasor  
Published: June 2021

Abstract
Marine renewable energy technology has attracted many stakeholders to develop due to its enormous resources and future potential advantages. One of them is the vertical axis tidal current turbine technology, which converts the kinetic energy of flowing seawater to be electrical energy. To operate the vertical axis tidal current turbine, especially its metallic components of the supporting structure, it is required to endure the aggressive and corrosive marine environment. Thus, deciding the good and suitable material for this application is very important in order to reduce the risk and hazards from the sea environment. The purpose of this paper is to decide the best metal material for the support structure of the vertical axis tidal current turbine. Therefore, the material candidate and their properties were firstly reviewed and discussed. Then, the material selection was processed through Multiple Attribute Decision Making (MADM) and formulated via the method of a Technique for Order Preference by Similarity to the Ideal Solution (TOPSIS). The result of material selection was carbon steel AISI 1045 as the selected material instead of other candidates such as carbon steel AISI 1018, stainless steel, and nickel aluminium bronze. Thus, it is expected to perform well to be used for the support structure and endure the marine hazards during the vertical axis tidal current turbine application.
Integrated Information System for Customer Care
Authors: Riananingrum D , Hari R R S , Nursaori F , Astuti WA 
Published: June 2021

Abstract
The application of customer Facing and Ecosystem Facing is implied as computerization of customer data. The goal is to understand customers’ needs and expectations to establish good relationships with customers. This study aims to determine Customer Facing and Ecosystem Facing services in the digital transformation business. The research method used a descriptive research method with a qualitative approach. Customer Facing and Ecosystem Facing is a technology that can increase the production process for business. Salespeople are faster to create and send offers to clients because it provides CRM information.
The Study of Main Component of the High Temperature Gas-cooled Reactor Balance of Plant using Local Component
Authors: Aji Setiawan Muksin , Pancoko Marliyadi , Kiswanta  , Bakhri Syaiful 
Published: June 2021

Abstract
National Nuclear Energy Agency (BATAN) as a research and development institution related to nuclear energy has designing Nuclear Power Plant (NPP) as one of the solutions to meet energy needs in Indonesia. This alternative electric power plant can be used as back up of fossil base power plant and maintaining the basic load of electric consumption. This research purpose is to simulate the balance of plant of the designed NPP and comparing the main component need to be produce by local industry. The simulation was created using Chemcad software to describe the process and component analysis of the NPP. The simulations done also can be increase the economic efficiency. Simulation results show the component data which can be used as a reference for the selection of the main components and pipes would be used in the construction of the reactor. The simulation results data of this simulation also can be uses to decide the local component that can apply in future NPP.
Breeding systems of naturalized versus indigenous species provide support for Baker’s law on Pohnpei island
Authors: Yomai Viann Marie Harmony , Williams Joseph Hill 
Published: June 2021

AbstractThe factors that facilitate successful colonization of islands should be especially evident where the establishment filter is strongest. Colonizers of small, remote oceanic islands should be initially rare, extremely mate-limited and often without pollinators. Hence, plant communities on such islands should reflect an establishment history in which young ‘naturalized’ species are most likely to display self-compatibility and autonomous selfing, whereas ‘indigenous’ species may exhibit more diverse reproductive strategies. To test this prediction, we characterized breeding systems of 28 species on Pohnpei, in the Federated States of Micronesia, a group of remote Pacific islands that are considered a global biodiversity hotspot. Three families with both naturalized and indigenous species were selected—Fabaceae, Malvaceae and Melastomataceae. Measurements included field observations of dichogamy/herkogamy and floral attraction traits, pollen:ovule (P:O) ratios and experimental hand-pollinations for self-compatibility and pollen limitation. Phylogenetic generalized least squares analyses tested for trait correlations between naturalized and indigenous species. Flowers of all 28 species were bisexual, and pollinator attraction features were common. Pollen:ovule ratios ranged from 9 to 557 (median = 87), and all 11 hand-pollinated species were self-compatible. All species had &gt;5 ovules and &lt;3500 pollen grains per flower. Indigenous species did not differ significantly from naturalized species for any trait. There is a dearth of data from remote islands bearing on the question of establishment history. In this study, we inferred all species to have some degree of autogamy and indigenous species were no more likely than naturalized species to display outcrossing mechanisms. On Pohnpei, high ovule numbers, and the inaccessibility of wind pollination and obligate outcrossing strategies, reflect the importance of retaining reproductive assurance mechanisms in the face of pollinator uncertainty.
The Swedish textile conservators’ transformation: From the museum curator’s assistant to a profession in its own right
Authors: Nilsson Johanna M , Blume Katarina S 
Published: June 2021

Abstract
Over recent years, in Sweden, the vocation of textile conservator has been transformed from that of being regarded simply as a museum curator's assistant to becoming a profession in its own right. The members of the textile conservators association, the Swedish Association for Textile Conservation founded in 1967, played a crucial role in this transformation with the establishment of a university-based vocational education programme in 1985. The transformation is further scrutinized by considering aspects of gender where, for example, gender bias employment strategies favoured men as painting conservators, as well as social class where demarcation of women as curators was evident. This is discussed and compared with the contemporary shift of gender distribution among the employees in the museum sector that historically was largely male dominated. Social class and the effects of a university education on occupational status are considered, and the effects that education had on elderly, experienced colleagues are another important intersectional aspect. Today’s textile conservators have reached a professional status in several aspects with university education being probably the most important contributing factor. The image of the vocation has improved from that of a seamstress who performed repairs on textiles at the direction of her superior, to an academic who, on the basis of their scientific knowledge, independently performs the many tasks included in preservation, as well as conducting research to doctorate level. Despite this, it would seem that the museum community has not yet managed to take full advantage of textile conservators’ competence as researchers.
Clinical and Angioarchitectural Features of Hemorrhagic Brain Arterio-Venous Malformations in Adults and Children: Contrasts and Implications on Outcome
Authors: Qureshi Ayman M , Muthusami Prakash , Krings Timo , Amirabadi Afsaneh , Radovanovic Ivan , Dirks Peter , Shroff Manohar , Armstrong Derek , terBrugge Karel , Pereira Vitor M 
Published: June 2021

Abstract

BACKGROUND
Hemorrhage from brain arteriovenous malformations (bAVMs) is estimated at 3% per annum. Features influencing risk of hemorrhage include perforator/posterior circulation supply, associated aneurysms, and deep drainage. Children are more likely to present with bAVM bleeds.

OBJECTIVE
To analyze differences in bAVM angioarchitecture between children and adults and describe predictors of poor outcome.

METHODS
Data were collected from adult and pediatric tertiary referral hospitals. Demographic data, bleed location, treatment, and follow-up modified Rankin Scale (mRS) were collected. Angioarchitectural assessment included aneurysm presence, nidus morphology, perinidal angiogenesis, intranidal shunting, steal phenomenon, venous ectasia, venous stenosis, venous reflux, and pseudophlebitic pattern. Regression analyses conducted to determine predictors of mRS > 2.

RESULTS
A total of 270 adult and 135 pediatric ruptured bAVMs were assessed. Median age was 42 (adults) and 10.9 (children) yr. Intranidal aneurysms were more frequent in children (P = .012), whereas prenidal aneurysms were more common in adults (P < .01). Children demonstrated more perinidal angiogenesis (P = .04), whereas steal phenomenon was commoner in adults (P < .01). Venous ectasia (P < .01), reflux (P < .01), and pseudophlebitic pattern (P = .012) were more frequent in adults. Children had better outcome (mRS score ≤ 2) (P < .01). Older age (odds ratio [OR] = 1.02), eloquent location (OR = 2.5), multicompartmental hemorrhage (OR = 1.98), venous reflux (OR = 2.5), diffuse nidus (OR = 1.83), pseudophlebitic pattern (OR = 1.96), intranidal shunts (OR = 2), and no treatment (OR = 3.68) were significant predictors of mRS > 2.

CONCLUSION
Children are more likely to have intranidal aneurysms and perinidal angiogenesis, whereas adults have more prenidal aneurysms, venous ectasia, corticovenous reflux, and pseudophlebitic pattern. Eloquent location, diffuse nidus, intranidal shunts, venous reflux, and pseudophlebitic pattern predict poorer outcome.
A real-time lucky imaging algorithm based on Fourier transform and its implementation techniques
Authors: Huang Xueming , Li Binhua , Wang Jinliang , Li Junwu 
Published: June 2021

Abstract
Lucky imaging is a high-angular-resolution astronomical image reconstruction technique which can effectively reduce or remove the effects of atmospheric turbulence. There have been successful real-time lucky imaging algorithms and corresponding implementations in the spatial domain. Although the results of lucky imaging algorithms in the frequency domain are better than in the spatial domain, until now there has been no corresponding real-time algorithm and implementation due to its complexity. This paper proposes a real-time lucky imaging algorithm based on Fourier transform that features real-time processing and dynamic updating and display. The algorithm is implemented on a small- or medium-scale field programmable gate array (FPGA) development board. In this system, a two-dimensional fast Fourier transform of the image is carried out by means of dimension reduction. In order to achieve real-time lucky imaging in the frequency domain, the sum of the squares of the real and imaginary parts are used to replace the amplitude for data selection, and the method of image grouping is used to speed up the data selection. Compared with other real-time lucky imaging algorithms in the spatial domain, this algorithm shows great advantages in image quality. Moreover, the system can carry out real-time lucky imaging processing in the frequency domain for more than 10000 frames of an original image of 512 × 512 pixels continuously, and dynamic display with an image of 128 × 128 pixels. The experimental results illustrate the validity of the proposed algorithm and the feasibility of the proposed implementation techniques for the FPGA-based algorithm.
Biased by Choice: How Financial Constraints Can Reduce Financial Mistakes
Authors: Heimer Rawley Z , Imas Alex 
Published: June 2021

Abstract
We show that constraints can improve financial decision-making by disciplining behavioral biases. In financial markets, restrictions on leverage limit traders’ ability to borrow to open new positions. We demonstrate that regulation that restricts the provision of leverage to retail traders improves trading performance. By increasing the opportunity cost of postponing the realization of losses, leverage constraints improve traders’ market timing and reduce their disposition effect. We replicate these findings in two distinct experimental settings, further isolating the mechanism and demonstrating generality of the results. The interaction between constraints and behavioral biases has implications for policy and choice architecture.