Investigation on moist silica sand’s circulation for sand mold printing with line-forming

2019 ◽  
Vol 25 (8) ◽  
pp. 1411-1420 ◽  
Author(s):  
Donghua Zhao ◽  
Weizhong Guo ◽  
Baibing Zhang ◽  
Feng Gao
Keyword(s):  
Design Methodology ◽  
Sand Mold ◽  
Silica Sand ◽  
The Novel ◽  
Paper Briefly ◽  
Content Type ◽  
Feeding Modes ◽  
Casting Industry ◽  
Circulation Problem ◽  
Novel Design

Purpose This paper aims to investigate the circulation of moist silica sand to provide appropriate feeding modes and references for designing the coating device when printing sand mold with line-forming. Design/methodology/approach First, this paper briefly introduces sand mold printing with line-forming and the circulation problem brought by moist silica sand. The outlet may be choked due to poor flowability and solidification characteristic, resulting in poor dimensional tolerance and even production failure. Then, based on circulation modeling, a series of feeding modes is proposed to guarantee adequate feeding, avoid solidification and ensure successful fabrication. Finally, the GUI of control software is developed, including slicing, path planning and the function of virtual printing. Findings Several feeding modes of moist silica sand are put forward to avoid the choke. Research limitations/implications The authors will further investigate the flowability of furan no-bake sand based on experiments. Originality/value This paper is going to provide references for the novel design of nozzle, prototype and sand mold printing, influencing significantly on mold manufacturing and the casting industry. This research applies equally to equipment having the circulation of high moist particles with solidification features.

Emerald – a 16-rotor multicopter for stereo imaging

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Svetoslav Zabunov ◽  
Garo Mardirossian ◽  
Katia Strelnitski
Keyword(s):  
Design Methodology ◽  
The Novel ◽  
Stereo Imaging ◽  
Content Type ◽  
Rotor Design ◽  
Novel Concept ◽  
Novel Design ◽  
Practical Implications ◽  
Prototype Testing

Purpose The current manuscript aims to propose a novel multirotor design. Design/methodology/approach This paper presents a novel 16-rotor multicopter design named Emerald. The novel design innovations and benefits are disclosed. Comparison to existing 16-rotor designs is carried out. Implementation areas where the novel idea shall yield benefit are discussed. A prototype of the presented design is described. Findings The herein proposed 16-rotor design has a number of benefits over existing 16-rotor multicopters. The paper elaborates on those advantages. Research limitations/implications The research was limited to prototype testing, as the presented design is a novel concept. Practical implications The motivation to research and develop this novel design is implementing the vehicle for stereoscopic photography and reconnaissance. The design is also applicable to carrying payloads while flying indoors.

Survey on the dissemination of Web-based information on “evacuation and sheltering” in the context of COVID-19 by the Japanese Government

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Hiroaki Sano ◽  
Yohei Chiba ◽  
Sachiko Maeda ◽  
Chiharu Ikeda ◽  
Nobuyuki Handa ◽  
...  
Keyword(s):  
Design Methodology ◽  
Information Dissemination ◽  
Central Government ◽  
Health Centers ◽  
The Novel ◽  
Web Based ◽  
Content Type ◽  
Administrative Agencies ◽  
Novel Coronavirus ◽  
Actual Response

Purpose This study examines the websites of central government ministries, prefectures and municipalities to obtain a comprehensive bird’s-eye view of how they are preparing for natural disasters in the context of the novel coronavirus (COVID-19) outbreak. Design/methodology/approach This study examines the websites of central government ministries, prefectures and municipalities in Japan to survey the actual status of information dissemination on “evacuation and sheltering” in the context of COVID-19. Findings This study found that the central government issued many notices, notifications and administrative communications to prefectures, cities with public health centers and special wards, which were mainly related to opening, securing and operating evacuation centers and improving the environment. It was found that most prefectures disseminated information on both survival and living evacuation and did so from June onward, when the flood season was approaching. Among the municipalities, there were differences in information dissemination tendencies by prefecture, and it became clear that smaller municipalities were especially incapable of fully disseminating information via the Web. Research limitations/implications The data from the prefectures and municipalities surveyed in this study were collected from websites and do not necessarily represent the actual response to disaster-related evacuation in the context of COVID-19 in those areas. To clarify this evacuation, more detailed surveys are needed. Originality/value This study is unique because no research has been conducted on the response of Japanese administrative agencies to disaster-related evacuation in the context of COVID-19; the actual situation was analyzed in this study by examining central government ministries, prefectures and municipalities as administrative agencies and comparing their responses.

Design and fabrication of a lower limb exoskeleton to assist in stair ascending

2019 ◽  
Vol 46 (2) ◽  
pp. 290-299 ◽  
Author(s):  
Payman Joudzadeh ◽  
Alireza Hadi ◽  
Bahram Tarvirdizadeh ◽  
Danial Borooghani ◽  
Khalil Alipour
Keyword(s):  
Lower Limb ◽  
System Performance ◽  
Design Methodology ◽  
Stair Climbing ◽  
Robot Design ◽  
Disabled People ◽  
Content Type ◽  
Lower Limb Exoskeleton ◽  
Knee Braces ◽  
Novel Design

Purpose This paper aims to deal with the development of a novel lower limb exoskeleton to assist disabled people in stair ascending. Design/methodology/approach For this purpose, a novel design of a mixture of motors and cables has been proposed for users to wear them easily and show the application of the system in stair climbing. Findings One of the prominences of this study is the provided robot design where four joints are actuated with only two motors; each motor actuates either the knees or ankles. Another advantage of the designed system is that with motors placed in a backpack, the knee braces can be worn under clothes to be concealed. Finally, the system performance is evaluated using electromyography (EMG) signals showing 28 per cent reduction in energy consumption of related muscles. Originality/value This investigation deals with the development of a novel lower limb exoskeleton to assist disabled people in stair ascending.

scholarly journals Becoming part of a temporary protest organization through embodied walking ethnography

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Amanda J. Lubit ◽  
Devon Gidley
Keyword(s):  
Northern Ireland ◽  
Media Coverage ◽  
Design Methodology ◽  
The Novel ◽  
Emotional Experiences ◽  
Conflict Setting ◽  
Content Type ◽  
The Social ◽  
Or Organization ◽  
Impact Data

PurposeThis paper explores the consequences of researching temporary protest organizations through embodied ethnography, paying attention to how, when and why a researcher takes sides.Design/methodology/approachThe authors employed embodied walking ethnography to study Lyra's Walk, a three-day, 68-mile protest walk held in May 2019 to advocate for peace in Northern Ireland. Data were primarily ethnographic, complemented by an analysis of social media, photos, videos and media coverage.FindingsFirst the authors argue that embodied walking ethnography can provide an inhabited understanding of organizing. The social, physical and emotional experiences of walking encourage researchers to identify more closely with participants and obtain a greater understanding of the phenomena studied. Second, the authors identify that methodological choice can have a greater impact on side-taking than either the conflict setting or organization researched.Research limitations/implicationsThis paper demonstrates the promise and consequences of using embodied walking ethnography to study a mobile organization. It further illustrates the nuances and challenges of conducting ethnography in a temporary protest organization.Originality/valueThe paper makes two contributions. The novel use of embodied walking ethnography to study temporary protest organizations can lead the research to become intertwined with the temporary organization during its process of organizational becoming. With the researcher's body acting as a research tool, their sensations and emotions impact data collection, interpretation and findings.

In-flight reconfiguration of lithium-ion cells aimed at extending flight times and range of electrically powered UAVs

2019 ◽  
Vol 7 (3) ◽  
pp. 98-111 ◽  
Author(s):  
Svetoslav Zabunov ◽  
Garo Mardirossian
Keyword(s):  
Design Methodology ◽  
Lithium Ion ◽  
Test Results ◽  
Content Type ◽  
Test Setup ◽  
Lithium Ion Cells ◽  
Battery Design ◽  
Novel Design ◽  
Battery Module

Purpose The purpose of this paper is to disclose a novel reconfiguration battery design suitable for electrically powered UAVs. Design/methodology/approach A design of a reconfigurable battery module is presented. Test setup with prototype battery module is developed and described. Test results of measurements are shown and discussed. Findings The results ascertain the benefits of implementing a reconfigurable battery in small electrically powered UAVs and specifically prove the efficiency of the proposed design. Originality/value The proposed novel design is compared to previous work while advances from the latter and the gained advantages were established.

Edge controller – a small UAVs distributed avionics paradigm

2019 ◽  
Vol 92 (2) ◽  
pp. 229-236
Author(s):  
Svetoslav Zabunov ◽  
Roumen Nedkov
Keyword(s):  
Unmanned Aerial Vehicles ◽  
Design Methodology ◽  
The Novel ◽  
Functional Requirements ◽  
New Paradigm ◽  
Content Type ◽  
Novel Approach ◽  
Novel Concept ◽  
Practical Implications ◽  
Structure And Design

Purpose This paper aims to reveal the authors’ conceptual and experimental work on an innovative avionics paradigm for small unmanned aerial vehicles (UAVs). Design/methodology/approach This novel approach stipulates that, rather than being centralized at the autopilot, control of avionics devices is instead distributed among controllers – spread over the airframe span, in response to avionics devices’ natural location requirements. The latter controllers are herein referred to as edge controllers by the first author. Findings The edge controller manifests increased efficiency in a number of functions, some of which are unburdened from the autopilot. The edge controller establishes a new paradigm of structure and design of small UAVs avionics such that any functionality related to the periphery of the airframe is implemented in the controller. Research limitations/implications The research encompasses a workbench prototype testing on a breadboard, as the presented idea is a novel concept. Further, another test has been conducted with four controllers mounted on a quadcopter; results from the vertical attitude sustenance are disclosed herein. Practical implications The motivation behind developing this paradigm was the need to position certain avionics devices at different locations on the airframe. Due to their inherent functional requirements, most of these devices have hitherto been placed at the periphery of the aircraft construction. Originality/value The current paper describes the novel avionics paradigm, compares it to the standard approach and further reveals two experimental setups with testing results.

How and when intragroup relationship conflict leads to knowledge hiding: the roles of envy and trait competitiveness

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
He Peng ◽  
Chris Bell ◽  
Yiran Li
Keyword(s):  
Regression Analysis ◽  
Design Methodology ◽  
Organizational Innovation ◽  
Underlying Mechanism ◽  
Relationship Conflict ◽  
Hierarchical Regression ◽  
The Novel ◽  
Content Type ◽  
Trait Competitiveness ◽  
Knowledge Hiding

Purpose Although studies have demonstrated that knowledge hiding is an important inhibitor of organizational innovation, current research does not clearly address how intragroup relationship conflict influences knowledge hiding. This study aims to identify the underlying mechanism between intra-group relationship conflict and knowledge hiding. Design/methodology/approach Drawing on affective events theory (AET), the authors propose a theoretical model and empirically test it by applying hierarchical regression analysis and a bootstrapping approach to data from a multi-wave survey of 224 employees in China. Findings Consistent with AET, the empirical results show that envy mediates perceived intragroup relationship conflict and knowledge hiding. As predicted, trait competitiveness moderates the indirect effect of perceived intragroup relationship conflict on knowledge hiding via envy. Originality/value The results support an AET perspective whereby knowledge hiding is shaped by relationship conflict, envy and trait competitiveness. This study introduces the novel proposition that relationship conflict and competitiveness influence envy, and consequently knowledge hiding.

Microwave assisted one-pot synthesis of pyrazoloquinazolinone derivatives and their application on printing of synthetic fabrics

2015 ◽  
Vol 44 (3) ◽  
pp. 165-171 ◽  
Author(s):  
G.H. Elgemeie ◽  
K.A. Ahmed ◽  
E.A. Ahmed ◽  
M.H. Helal ◽  
D.M. Masoud
Keyword(s):  
Design Methodology ◽  
The Novel ◽  
Reaction Products ◽  
Color Strength ◽  
One Pot ◽  
Content Type ◽  
Microwave Assisted ◽  
Silk Screen ◽  
Ice Water ◽  
Benzaldehyde Derivatives

Purpose – The purpose of this paper is to synthesize some novel 2-amino-6,6-dimethyl-9-phenyl-3-(phenyldiazenyl)-6,7-dihydropyrazolo-[5,1-b]quinazolin-8(5H)-one derivatives by multi-component one-pot reaction using a microwave as a new tool for green chemistry. Design/methodology/approach – An equimolor from arylazopyrazole, 5,5-dimethyl-1,3-cyclohexanedione (dimedone) and benzaldehyde derivatives was dissolved in Dimethylformamide (DMF) to be irradiated in a microwave for 15 minutes; after completion of the reaction, as indicated by Thin layer chromatograph (TLC), the reaction mixture was poured into ice water, filtered and then crystallized with an appropriate solvent. Findings – The structure of the synthesized dyes was established and confirmed for the reaction products on the basis of their elemental analysis and spectral data (MS, IR and 1H-NMR). These prepared dyes were used to print polyester and polyamide fabrics using synthetic thickener in the printing paste for the silk screen technique. The synthesized dyes are superior in terms of yield, purity, color strength and fastness properties and will lead to valuable achievements for commercial production. Originality/value – An efficient method for synthesis of pyrazoloquinazolinone dyes was designed. The novel procedure features short reaction time, moderate yields and simple workup. The authors studied its application in printing polyester and polyamide fabrics.

Educational mismatch and its impact on earnings: evidence from Indian labour market

2017 ◽  
Vol 44 (12) ◽  
pp. 1778-1795 ◽  
Author(s):  
Swati Sharma ◽  
Prateek Sharma
Keyword(s):  
Labour Market ◽  
Design Methodology ◽  
Sample Selection ◽  
The Novel ◽  
Educational Mismatch ◽  
Endogeneity Bias ◽  
Content Type ◽  
Work Related ◽  
Wage Effects ◽  
Identification Strategy

Purpose The purpose of this paper is to examine the incidence and determinants of educational mismatch in the Indian labour market. It also attempts to measure the wage effects of educational mismatch, and other individual and work-related characteristics. Design/methodology/approach Educational mismatch is modelled using multiple Mincerian equations. Wage effects are measured using the novel identification strategy of Lewbel (2012), which constructs internal instruments to obviate potential endogeneity problems. Findings The authors find that the returns to over-education are positive and significant, while the returns to under-education are negative and significant. However, over-educated would earn less than the workers who have the same educational level, but who are engaged in occupations for which they are adequately educated. Originality/value This study is one of the earliest attempts to identify the determinants of educational mismatch in the Indian labour market. Additionally, it measures the effect of educational mismatch on labour market earnings, as well as marginal wage effects of each surplus (or deficit) year of education. Methodological improvements ensure that the results are robust to the sample selection bias, as well as the endogeneity bias.

Everest sales staff learn at home-from-home

2015 ◽  
Vol 23 (4) ◽  
pp. 5-7
Keyword(s):  
Design Methodology ◽  
Training Center ◽  
Content Type ◽  
Home Improvement ◽  
Novel Design ◽  
Practical Implications ◽  
Sales Staff ◽  
At Home

Purpose – Describes how a home-improvement company that seeks to “rewrite the rule book in its sector” has opened a dedicated training center whose design replicates customers’ homes where most of its sales take place. Design/methodology/approach – Explains the reasons for the Everest Training Academy, the form it takes and the results it is helping to achieve. Findings – Reveals that the idea behind the training academy is to help the company’s sales people to feel comfortable about selling in people’s homes and to showcase other products than simply windows and doors. Practical implications – Explains that the academy is designed to ensure that staff are respected for their knowledge and professionalism, and feel good about themselves and the position they hold at Everest. Originality/value – Describes a novel design of training academy.

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